5. 2 module, castellated pins BC833M, BC833E, nRF52833 BLE 5. Bob both explains and demonstrates how castle nuts are used alongside cotter. from $11. 3 Module for Wearable IoTs. Recommendations and comments When castellated features are required, it is best to use the following general rules when at all possible . When comparing the mixing achieved by disc and pin type stirrers, it was found that pin type stirrers exhibited higher and more fluctuating circumferential fluid velocities than the disc stirrers. Using these castellated holes, we can change the pin layout of the component as we desire. Once this is done, bend the legs of the cotter pin in opposite directions, forming a secure and tamper-resistant connection. 902 to 928 MHz. 2 Connector In addition, Portenta C33 features castellated pins, making it suitable for automatic assembly lines. Nuts used with cotter pins for positive locking. BC832, micro Bluetooth 5. MX 8M Plus application processor board. On the next pad, hold the tip of the iron so that it touches both the castellated via and the pad. 27mm. Line of sight range between 2 BT832X is 1170 meters. Designing a printed circuit board [. 2mm pitch. • Operation voltage: 2. Since iOS 15, all nav bars are transparent by default. Straighten the split pin and pull it out with pliers. Place a via whose drill lies inside the pads. 8-3. An alternate method where the cotter pin is mounted normal to the axis of the bolt may be used where the cotter pin in the preferred method is apt to become a snag. 2 module using Nordic nRF52805 SoC with integrated antenna. With a finer pitch, I'd use a thinner board though (like 1mm thick). 0 SMT footprint requires the addition of edge cuts (indicated by lines in the Dwgs. Use pliers to grab a split end and bend it around the castle nut. the ball joint stud, doing a one size fits all. STEP 2 . The module form factor is compatible with Portenta and MKR ranges and features castellated pins – friendly for automated SMT assembly on application specific carrier boards. Four RP2040 IO are used for internal functions - driving an LED, on-board Switched Mode. 27mm. 54 mm, and a pad diameter of 1. Technician A says technological innovations in today's. The cotter pins mostly used on custom aircraft are AN380 and AN381. 20 x GPIO pins with following capabilities: 18 GPIO on castellated/pin breakout pads. Height includes the. Technician B. Of these 14 pins, 11 can be analog inputs or digital I/O. Maximizes available PCB real-estate. One major challenge is the decoupling capacitors on the bottom of the PCB. You can use castellated holes to create wireless links between PCBs. 50 each at 1 pcs; $2. The board uses well known Pro Micro footprint with castellated mounting holes. It still requires soldering in place, but has helpful features like castellated pins for the LED board side and 3M tape to adhere and stabilize the cable. 2. Castellated pads can change the pin layout of the component based on user requirements. 4 12 bit ADCs; 2 I2C, 2 SPI and 2 UART peripherals, we label one of for the ‘main’ interface in standard Pro Micro locations; 16 PWM outputs - for servos, LEDs, etc2. BC832, micro Bluetooth 5. Cite. Solder the black wire to the castellated pin (which is connected to DA7280's OUTN pin) that is. • 45 LGA (Land Grid Array) pins to access all 48 GPIOs of nRF52840 when needed. 5mm and they should be separated by a spacing of at least 0. Pin Functions BT680F module has 16 castellated pins for product needing limited GPIOs and additional 24 Land Grid Array (LGA) pins. (Maybe you can't do through hole) But more to the importantly: Surely you'd have to be making a custom PCB to match the board you're looking for. BC805M, the $1. Zero Component Cost on the PCB. 2" 0. KiCad-RP-Pico. SMT equipment is not required for soldering castellated pins. Place a large rectangular pad on the top layer. Back the nut off 1/2 to 1 full turn and rotate wheel assembly. Bence Kaulics. V), the voltage at this pin will be about 4. Don't forget to follow us on social to stay up-to-date on. Size of this micro module is 7. 54 mm female headers that are connected to the pins of the module mounted in this board. Additional 24 LGA (Land Grid Array) pins provide access to all nRF52810 GPIO pins. 50 each at 1 pcs; $2. BC832, micro Bluetooth 5. It has 16 castellated pins for applications needing limited number of GPIOs. It includes specifications for cotter pins from 1/32 00to 3/4 diameter and 1/4 00to 6 length for various materials and coatings. SparkFun and Adafruit also sell Pogo Pins. Features castellated pins for automatic assembly lines; Cost Effective Performance. These hexagonally shaped hardware nuts are designed most commonly with six slots that have a 60-degree space in between. 5 mm. Board features: Same size and form-factor as a Pro Micro breakout and nearly-identical. 50 ; a version with breadboard-friendly male headers pre-soldered is also available for $25. Here are some steps explained that show how castellated pins are created: PCB Design: In the PCB design phase, you define the shape and location of the castellated pins on the board’s edge. Favorited Favorite 18. The correct way to install a split pin is to first tighten the castellated nut and align its slots with the hole on the screw or bolt. Split the cotter pin ends and bend them. The castellated pin layouts match that of the Raspberry Pi Pico ensuring maximum compatibility with existing boards, however, the board is a little longer than the original to accommodate the Ethernet port. 2 module, castellated pins BC833M, BC833E, nRF52833 BLE 5. Operating at 3. We put the latest RP2040 board to cross our. SparkFun’s Pro Micro RP2040 looks to be the ideal form factor for those that need lots of GPIO pins, castellated edges and a Qwiic connector. Pins. It includes specifications for cotter pins from 1/32 00to 3/4 diameter and 1/4 00to 6 length for various materials and coatings. 1 module BC840M, BC840, BC840E, Compact nRF52840 modulesEC06-IDC 6-pin Castellated Board-Edge Connectors $ 83. 16 castellated pins. Each Steel Pin is machined with 12 spirally. This board like many ESP32 boards is breadboard friendly for prototyping but it also has castellated pins that allow it to be soldered directly to other PCB like any other SMD component, so. . 0 mm. • Half holes. Discard the pin and fit a new one later. This is said to have been used by Rhodes as a belvedere, and (according to some sources) by railway staff for some time after opening. We can incorporate a variety of design options from floating bases to. Specifically Nicla boards are designed so that a nicla board can be fitted in the first half of the MKR. nRF52832 + SKY66112 module with an u. Single-chip USB to UART bridge provides transfer rates of up to 3. Solder the black wire to the castellated pin (which is connected to DA7280's OUTN pin) that is. 50 . 35mm), please use the Advanced PCB service. BC832 is a Bluetooth Low Energy (BLE) 5. Sometimes, users may have different layout requirements for their contacts. BT, Feature Upgradeable, BLE Range to 4500meters+ BT Series, 18 modules with compatible footprints, support BLE 5/5. The red power LED doesn't light up when running off battery. 3V variant of the family with an Arm Cortex-M0+ microcontroller and a pre-certified ESP32-based WiFi and Bluetooth®. Select the dummy pad and set the following dimensions: Castellations— or castellated edges, plated holes on the board’s edge, plated half-holes — are rampart-like structures along the edges of a printed circuit board. 1 module BC840M, BC840, BC840E, Compact nRF52840 modules16 castellated pins. Ranges between 2 BT832XE with ANT060 external antenna is 1350 meters. 04×25. They’re not recommended for use on parts exposed to high vibration because the pin is prone to shearing under prolonged stress. 00 modules: nRF52832, BT832 (castellated pins); nRF52833, BM833 (42 GPIOs); BC833M (no external component required for VDD power). This prevents the nut from rotating in either direction to prevent. 20 x GPIO pins with following capabilities: 18 GPIO on castellated/pin breakout pads. 2 ConnectorIn addition, Portenta C33 features castellated pins, making it suitable for automatic assembly lines. 0mm. Soldering the devboard is easy with the castellated pins but it can be a bit too big to incorporate in some designs. Raspberry Pi Pico’s pins are castellated, allowing pin headers to be fitted for breadboard use or the entire board to be soldered as a flat module. 1. 2 module, castellated pins BC833M, BC833E, nRF52833 BLE 5. Four 12 bit ADCs; Two I2C, Two SPI and two UART peripherals, we label one of for the 'main' interface in standard Pro Micro locations; 16 x PWM outputs - for servos, LEDs, etcSoldering the devboard is easy with the castellated pins but it can be a bit too big to incorporate in some designs. Castellated holes are used on small modules as an alternative to pin-header mounting. 6 KB. . These female headers are connected to pins of the module mounted on this board. I've started from the schematics and footprint files available on the HeadBoffin RP_Silicon_KiCad GitHub project. While we don’t offer full support for castellations, they can be fabricated if you don’t mind a few minutes of rework and verification of the PCBs. The pins are not 5V tolerant. The design process involves drilling and copper plating, but via is not like normal PCBs, instead, it is smaller than a standard hole. BC832, micro Bluetooth 5. These slots allow for the insertion of a cotter pin or a similar locking mechanism. Spring Pins. 8V (USB's 5V minus a Schottky diode drop). Breadboarding a castellated SMD daughter board. Learn more. 05″ or 20 pin 0. Will castellated pads make much difference to the profile? The pins on the common Dev boards don't stick up further than the module anyway. 2 (40) 4. Cotter Pins: The Perfect Companion. 7mm (!) pogo pins ( MPN: 1007-D-0. Sometimes, users may have different layout requirements for their contacts. Can I map pins 101 and 102 in software to couple of the castellated pins. 20 x GPIO pins with following capabilities: 18 GPIO on castellated/pin breakout pads. It is a QFN style 29 mm square system. TX power is + 21 dBm. Welcome to a new Voltlog, in today’s video we’re going to be talking about castellated holes and how you can create them in your CAD tool. Unfortunately, the Teensy does not come with castellated holes (like the Photon or most wireless boards):. We can mount PCBs with castellations on top of one another with ease. Slowly feed solder into the space between the iron's tip and the pad. Castellations— or castellated edges, plated holes on the board’s edge, plated half-holes — are rampart-like structures along the edges of a printed circuit board. WiFi 6 Companion Module Summaries. Rather than an RP2040 microcontroller with its two Arm Cortex-M0+ cores running at up to 133MHz, though, the. BT840F and BT832F Mechanical drawings, top view !9Three castellated (with battlements) towers stand sentry here, with one being particularly large. 27-mm spacing; ESD and surge protection on USB data lines and power input; 500-mA polyfuse; Ferrite bead for power filtration; Low-pass filter for analog voltage reference; 24 available IOs; Protruding USB Type-C port with mounting slots beside it; LED on pin 13; Made in the EU; Comparisons The standard specifies 4, 6, 8, and 10 pin varieties (mapping to sizes of available connector, the ‘010’ in the number above specifies pincount) offering increasing levels of connectivity up. Torque the Castellated Nut to 200 ft-lbs. The castellated PCBs are capable of replicating specific components on a circuit board. You can make the board square and use a finer pitch of castellated pins. WT02E40E Series modules support 4 radio interfaces with various antenna options. • 16 castellated pins for application needing limited number of IOs. Use a plug-and-play QT cable to connect to the last two pins without having to do. Use a plug-and-play QT cable to connect to the last two pins without having to do any desoldering/rework. The combination between the MS9358 nut and the NAS670x bolt is good regarding very similar strengths and resistances, but not regarding mounting and locking them with cotter pins. Castellated holes are advantageous when it comes to changing the pin layout. Castellated Power and Reset Pins USB Power Pins These nets consist of the following: V is the voltage provided from the USB connector. The keyhole is proper when redesigning the pin. Portenta C33 is a streamlined module that offers the high performance of the Portenta family at a lower price point, thanks to optimizations and streamlined features. FlexyPin is a connector pin designed to be used with castellated modules with pitch down to 1. Has anyone tried using plated through-hole vias (castellated holes) as receptacles (female side) of a pogo pin? On top of that the pogo pins would need to be embedded in the pcb to be in the same height. Holding a multimeter probe (even if it's a PCBite) up to it by hand would be a nightmare so, I designed a little test jig that uses 0. 1 module BC840M, BC840, BC840E, Compact nRF52840 modulesShare on Twitter Share on Facebook Pin It. 6,383 12. Castle nuts are used in conjunction with a cotter pin to prevent loosening. Dowel pins in the socket base align with the non-plated thru-holes on the device and are essential for testing devices with. Castellated PCBs can make small modules and breakout boards. Cotter pin with castellated nut tests AN380 [6] and AN381 [7] have been superseded by MS24665 [8] and then NASM24665 [9] which is the specification standard for aerospace cotter pins. PCB Library Expert can intelligently create the footprint for you based on the module's dimensions. Customers who purchased this item also purchased. Solder the black wire to the castellated pin (which is connected to DA7280's OUTN pin) that is the closest to the PWR LED. Also, it’s easy to mount castellated PCBs on another to make a final product. 27-mm spacing; ESD and surge protection on USB data lines and power input; 500-mA polyfuse;. Castellated holes appear on the edge of PCBs typically as plated half holes. In addition, these holes make mounting PCBs easier and. Based on size, are the castellated nuts to be torqued to the same values as the standard AN bolt / locknut combination (say, 20-25 inch lbs. This leaves the nut being past the hole in the stud for the pin. BC832, micro Bluetooth 5. These pins configure the electrical connection of a sub-module to the main board. Firmware configuration is required to perform the same function. And this is only for prototyping. Hello list, I want to solder the nano 33 ble board on a PCB. Additional 24 LGA (Land Grid Array) pins provide access to 29 GPIOs of nRF52832. Separate the hub carrier from the wishbone. $10. Stainless Steel Locknuts for use with Cotter Pins. Size of this micro module is 7. In this OnTrack episode, Ben Jordan goes in depth on design considerations for castellated modules. 2 module, castellated pins BC833M, BC833E, nRF52833 BLE 5. In this post, we will discuss How to Design a Castellated PCBs Board in 2023. Finally, its ultra-low power consumption makes 24/7 always-on sensor data processing possible, with the option of battery-powered standalone operation. Two types of pins are available to meet different application requirements. g. One leg of the pin is bent back against the flat of the nut, the other is bent up around the end of the axle and pressed tight against the axle end. With such clips, you can quickly connect and disconnect. 3V signals. The compact board is very clearly inspired by the Raspberry Pi Pico, borrowing the same overall layout and handy castellated pins which make it suitable for breadboard use and surface mounting as as module. Super Atv sent axle stenders. 1″) pitch, so you can solder headers directly onto it and even use them in a breadboard. Fortunately, I caught the problem before damage occured, but many of the nuts had lost both tails. Today’s Diminutive Device is a small castellated System-On-Module (Twitter link, nitter proxy) from [MangoPi] called M-Core, with a quad-core A53 CPU and 1 GB of RAM. In essence, this means all overlapping pads should just have the same pad number. It provides 26 GPIO pins, three of which can function as analogue inputs, on 0. Design templates. for example module physical pin #15 (SWCLK) / pin #16. 5mm and they should be separated by a spacing of at least 0. The Eagle file for the Nano Every shows 0. 00. Castellated Grounded Seal Ring: VLLD: Alumina: ENEPIG: Yes: QFN-8848. Electrical connectivity: The castellated pins establish a dependable electrical connection between the PCB and the components. The nut is attached and a pin is passed through the notches and the hole in the screw, preventing the nut from turning. Rolling Pins. 2 out of 5 stars. BC832, micro Bluetooth 5. 00mm pitch but that would require a more expensive PCB because the footprint drills would be very close. My approach has been the following: Create a custom package. [1] The name comes from the nut's resemblance to. Renesas R7FA6M5BH2CBG microcontroller. Raspberry Pi Pico specifications. 1″ connector such as found on the standard J-Link debuggers). While castellated holes can be created in various ways with small cutouts and lead-in holes, the most popular method is to use the half-hole approach where a via within a. Reliable, secure and with computational power worthy of its range, Portenta C33 was designed to provide big and small companies in every field with the opportunity to access IoT and benefit from higher efficiency levels and automation. It’s a clever trick that could be modified to other boards and designs that use castellated mounting holes: Made this adapter to program and test esp8266-12e modules. Setting it to 0 still does not allow a route to start from the pad. - Slots (called castellation) in the nut are designed to accommodate a cotter pin or lockwire for safety. The castellated shear nut, AN320, is designed for use. 4" 0. With a 2 dBi antenna, the maximum radiated power is +31. The castellated holes can serve as a direct electrical connection between the PCB and other components, reducing the need for additional connectors or wires. Castellated Edges. The image below illustrates a castle nut: Enter a caption (optional) In this application, a hole is drilled in the bolt, so the cotter pin can go through the slots in the castle nut. The pins will fit into the module’s castellated holes. Locking moments up to safety lock. Spring washers are used in many joints but are only used with locking. 1 module BC840M, BC840, BC840E, Compact nRF52840 modules27x GPIO including castellated headers; JTAG pins on the header; TinyPICO/TinyS3 compatibility; FAQ. Norman_E said: It depends on thread diameter and pitch but 50nm or about 75 ft lb would be OK if the thread diameter is around 5/8th inch. We put the latest RP2040 board to cross our. This can result in lower signal loss and improved signal integrity, especially in high-frequency applications. _ , CABLES . 2 module, castellated pins BC833M, BC833E, nRF52833 BLE 5. A car hub showing a castellated nut cover and split pin (near center) Split pins are frequently used to secure other fasteners, e. 6. installation of cotter pins 1-16 revision 1. 50. 3Dogs January 17, 2023, 5:19pm 11. Physically the QT Py is less than 1” square at 20mm×17. Leadless Chip Carriers (LLCC) packages are characterized by external connections consisting of metallized inset terminations (a castellation), making the package resemble a miniature castle. SKU. If the. Pad placement on castellated circuit board. Remove any castellated retainer. 48. These holes give designers an easy time when they want to change the pin layout. More and more we see castellated PCB connectors. Specifications are: Max TX power: +29. • 16 castellated pins for application needing limited number of IOs. Castellated holes typically perform a function similar to that provided by edge connectors, but they do not take up so much space and allow much higher connection density. These holes give designers an easy time when they want to change the pin layout. I §~----. As such, it’s very…Two types of pins are available to meet different application requirements. It is footprint compatible with BT40F (15x20. 1”-pitch through-hole pads with castellated edges. BC832, micro Bluetooth 5. 5V • Operation temperature: -40°C to +85°C • FCC ID: • ISED ID: • CE: • Japan: • Australia RCM: Bluetooth Host Modules Matter applications, Certified or being certified for BLE and Thread. Specifications:Header pins are referenced to the VDDIO pin which can either be generated internally with a programmable voltage or fed externally. Raspberry Pi Pico W is available as an individual unit, or in 480-unit reels for. LEADLESS CHIP CARRIERS. If the board is powered via USB (i. 6V Operation temperature: -40°C to +85°C QDID: 138610 FCC ID: X8WBC805M ISED ID: 4100A-BC805M CE: Compliant (including EN300 328 V2. Castellated pins at 1. The through-hole pads have castellated edges for each pin to add a lower profile in your projects should you decide to build it into another assembly during production. Many tutorials on castellated half-holes are for designing the half-holes themselves (OSH Park, and Danny Staple's question). Haven't been able to ride since. 6 x 1. User layer) which. Sometimes, users may have different. Hey hey, the stock Pico has castellated pins, so it's fairly easy to directly solder it onto the pcb directly. BT40F mechanical drawings, top view 8SparkFun Qwiic Pro Micro - USB-C (ATmega32U4) - Compatible with Arduino development board 5V/16MHz microcontroller AP2112 3. Flat rate shipping is available within the USA via USPS, and worldwide via FedEx or DHL International Express. For prototyping, if the pins are spaced correctly, you can solder them directly onto the copper side of stripboard (Veroboard). 17. Step 2: Select the Appropriate Software. Product Type All Cad plated Stainless steel. On the other hand, if theYou may use safety wire in lieu of a cotter pin. BC832, micro Bluetooth 5. Fanstel BC805M is a Bluetooth Low Energy, BLE 5. 06" x 0. Size: 10. 00 modules: nRF52832, BT832 (castellated pins); nRF52833, BM833 (42 GPIOs); BC833M (no external component required for VDD power). forencich' and '@Tony Stewart Sunnyskyguy EE75' these parts are called castellated edges, castellation, castellation. Non-plated thru-holes on the UUT are used for fine alignment of the device to the pogo pins. Interestingly, you can use single PCBs to create integrated modules. Cotter Pins: The Perfect Companion. It has 16 castellated pins for applications needing limited number of GPIOs. For [Nick Johnson]’s Hackaday Prize entry,. Don't forget to follow us on social to stay up-to-date on the. These holes give designers an easy time when they want to change the pin layout. BC832 with castellated/LGA hybrid pins. For the standard PCB service, the minimum diameter of castellated holes is 0. If you use a castle nut and wire or cotter pin, the nut will never come off. Female Headers. 8x1. Split the cotter pin ends and bend them. Hence, I DO NOT want to solder using regular header pins -- i. 13-1B states: 7-66. BC832, micro Bluetooth 5. Connectors on rigid PCBAs do not use pins or solder balls. The plated pins provide increased stability and durability compared to other surface-mounting techniques. Configures the strapping pin. 2 module, castellated pins. Size of BT832A is 14x16x1. 4mm (2. This uses version 2 of our patented literal edge of the board connector which is smaller and more robust whilst being fully compatible with version 1. Note to self. Who is correct? Question 38 options: Technician A. FL, approtect version. 2 module, castellated pins BC833M, BC833E, nRF52833 BLE 5. Here are some steps explained that show how. This kind of edge where the board edge goes through plated holes and the holes are cut in the middle is called castellation castellated edge plated half-holes semi-plated holes etc. These would require a cut out if one were trying to solder to a baseboard. 3V Voltage Regulator Castellated PTH pin pads Reset button Maximum 6V input Page 1 of 1 Start over Page 1 of 1To push against the castellated pin headers of a Raspberry Pi Pico or wireless-capable Raspberry Pi Pico W, the FlexyPins which are available as an extra are soldered into the board. Additional 24 LGA (Land Grid Array) pins provide access to 29 GPIOs of nRF52832. This paper presents test results and analyses of safety lock wire and cotter pins with castellated nuts used as locking features in threaded fasteners. Four 12 bit ADCs; Two I2C, Two SPI and two UART peripherals, we label one of for the 'main' interface in standard Pro Micro locations; 16 x PWM outputs - for servos, LEDs, etcBC832, micro Bluetooth 5. 2 module, castellated pins BC833M, BC833E, nRF52833 BLE 5. Study with Quizlet and memorize flashcards containing terms like Castellated Nuts, Hexagon ("Hex") Head, Square Head and more. 04 inches or 10 mm. Castellated PCBs can act as breakout boards for a particular area of a larger PCB. 1 module BC840M, BC840, BC840E, Compact nRF52840 modulesShown in the images above is the Version 1 Tag-Connect Edge-Connect EC-14 14-pin cable with Castellated Edge Connector and attached target PCB (Demo PCB not included). Digi provides a set of pre-populated design templates. 9mm. 12", (60 mil x 120 mil) pads that are truncated at the board edge. These locknuts have good chemical resistance and may be mildly magnetic. • 16 castellated pins for application needing limited number of IOs. Think about an Arduino hat or shield board form factor; instead of. 8. Page 10 BLE 5. 14" (80 mil x 140 mil) that should work ok. Select a reliable PCB design software that offers the necessary features for castellated PCB design. Although the SOMs are not 100% drop-in compatible, a lot of primary functionality is pin-to-pin compatible between platforms. I would assume my only real option is to solder breadboard jumper wires onto the pins I need and leave the rest floating. 9mm or 15x20. Plated half holes are available in both standard and Advanced PCB services. 2 module, castellated pins BC833M, BC833E, nRF52833 BLE 5. Sold By All Each. Crown nut shearing cotter pins. e. Castellated holes are advantageous when it comes to changing the pin layout. 27mm pitch single row pin headers and sockets, and i was thinking to use socket to make a 1. I haven't tried it but it should be possible to make something with pogo pins and a 3D printed jig to guide and hold things in place. 6×1") The pinout is designed for compatibility with Arduino's MKR family of development boards, but there's also a pair of high-density. BC805M: BLE 5. RSS Feed. SMT equipment is not required for soldering castellated pins. With a peened nut, use a small cold chisel and hammer to raise the peening from the axle groove. J4. AN960 Flat Washer (100 pack) AN310 Castellated Nut. The boards are fabricated with semi-plated holes on their edges known as castellated pins. BC832, micro Bluetooth 5. (Edited to correct units) castellated pins. • Holes with small leads for connectors. Create a footprint or several footprints which have the holes and their copper pads. 1 module BC840M, BC840, BC840E, Compact nRF52840 modulesIt’s “castellated edge” or holes or castellation. clevis pins, or to secure a castellated nut, or, infrequently, as a low-tech shear pin. castellated meaning: 1. bask185:Castle nuts rely on cotter pins and protruding triangular sections to create a formidable locking mechanism that can withstand a lot of vibration and movement. Boeing-Stearman PT-13D (9). The pin must not too snug or too loose should be the feeling when you put it on. 6mm QFN package. Castellated nuts are a positive locking device that’s used to ensure that the nut remains affixed and resists vibration. SparkFun’s Pro Micro RP2040 looks to be the ideal form factor for those that need lots of GPIO pins, castellated edges and a Qwiic connector. Once you have enough solder, remove the solder first. The keyhole is proper when redesigning the pin. One reason to use holes is to fit the edge holes for some standard width so that the castellated board can be soldered to pin headers, although extra holes inside the board outline may also be used for that if there’s enough room. FlexyPin. March 7, 2022 [SolderParty] just announced FlexyPins (Twitter, alternative view) – bent springy clips that let you connect modules with castellated pins. Like the castle nut, it is castellated for safetying. I would recommend using a set of vias with header pins. I have a Commander 1000. These nuts are also called castellated nuts and spindle nuts.