Shared Projects

This PCB board is 17mm in diameter, it has a four P-Channel SSM3J355R,LF channel mosfets that is capable of tolerating 20V 6A each. It should be fairly simple to solder, even that it is surface mounted. It does not conduct any electricity if subjected to the wrong polarity. It has two solder pads,the one on the DC protected side can be soldered to the top of your existing drivers spring. There is also two DC- or ground connections, I suggest a AVG 15 (1.45 mm diameter ) flexible wire for this usage. The + IN unprotected side goes to the batteries. DC OUT to the driver spring, as this is the protected side.

BOM: four P-Channel SSM3J355R

Github: https://github.com/Supermagnum/smallpolarity

Daughter board for Roland A-49 MIDI Keyboard Controller that adds analog synth CV outputs for the pitch / mod control (joystick thingy on the left side) making pitch / mod smoooooth and … well analog. Without this mod, MIDI will send 7bit codes which sounds stepped (USB does not have this problem - it’s only stepped when using a MIDI cable). When the ring contact of a jack is not grounded, the A-49 will exhibit stock behavior. Bolts on / plugs in using existing JST connectors. See https://groupdiy.com/index.php?topic=75780.0 for details.

https://drive.google.com/file/d/1YYBDUHiBtqtfx-wqjtNrHVXqmivN5oUv/view?usp=sharing

A fixed version of my original 2014 LEGO RCX IR Tower mini Arduino shield. Write up of it’s use with `NQC (“Not Quite C”) can be found here: https://gist.github.com/JamesHagerman/24f350ff177bf9bf80a440e7e5e4f525

Note: This version is untested, but it’s simple enough that I’m 90% certain it will work as expected.

Smallest possible Shoe board – OSHPark won’t make a board smaller than this. Only has one 6DoF, and no spot for I2C transceiver. Only uses six wires. Uses castelation connector.

This can still be compatible with the WearablePocketometer, as long as the software expects it.

Particle Xenon based solar powered soil sensor for garden monitoring.

DDDAC 1794 AC Power distribution. Including optional solid state relay. When a momentary switch is used in combination with the solid state relay, the soft power down controller can be used.

See for more info https://github.com/bitkeeper/dddac1794build/tree/master/powercontroller.

This PCB board is 31mm in diameter, it has a single P-Channel IRLR9343TRPBF mosfet that is capable of tolerating 20V 20A. It should be fairly simple to solder, even that it is surface mounted. It does not conduct any electricity if subjected to the wrong polarity. It has two 13mm solder pads,the one on the DC protected side can be soldered to the top of your existing drivers spring. There is also a DC- or ground connection, I suggest a AVG 15 (1.45 mm diameter ) flexible wire for this usage. The DC+ unprotected side goes to the batteries.

BOM: one P-Channel IRLR9343TRPBF MOSFET.

Github: https://github.com/Supermagnum/polarity

break out servo and power\ground pins

Ultra-low-power, BLE-enabled STM32WB55 host, wake-on-motion BMA400, 16 MByte SPI flash, LiPo charger and easy programming using Arduino IDE via USB. Accepts separate sensor module. SPI, I2C, and UART ports exposed along board edge. Mounts into a Hammond 1551P ABS box. For wearable event/limb tracking, ergonometrics and repetitive motion analysis, and inclinometry, etc.

Haptic Glove Shiel for Tiny pico

Breakout for a 74HC595 shift register that drives a ULN2803A Darlington array. Input comes in from J1 and can be chained via J2 to another module. Output is via pins 1-8 from J3, with VCC powering pins 9-16 for convenience.

Attaches 0805 Resistors and LEDs to breadboards for debugging purposes