Project details: https://github.com/andyclymer/kerntroller

Plugs into an J-Link to convert the 100mil 20-pin header into a 100mil and 50mil 10-pin headers with standard SWD pinout. A reset switch and some test loops are also provided.

Because of the depth of the header on the J-Link relative to the housing and the limited selection of heights of female SMT headers, I recommend using a piece of ~1/16" or 2mm thick craft foam as a spacer between the bottom of the board and the J-Link. It can be cut to the outline of this board, with a rectangle cutout for the header on the bottom, and glued or double-stick-taped to the bottom of the PCB.

#   Manufacturer    MFR PN  Quantity    Qty Ext'd   Value   Description Designator
------------------------------------------------------------------------------------
1   Kingbright  APTD1608CGCK    1   100 Green   0603 LED Green 60° 230mcd 570nm    D1
2   3M Interconnect Solutions   966210-2000-AR=PR   2   200 966210      J1, J2
3   Amphenol FCI    20021521-00010T1LF  1   100         J3
4   3M Interconnect Solutions   N2510-6V0C-RB-WD    1   100         J4
5   KOA Speer   RK73H1JTTD1000F 1   100 100 100Ω 100mW 1% 100 PPM/°C 0603 Thick Film Resistor R1
6   KOA Speer   RK73H1JTTD2201F 1   100 2k2 2k2Ω 100mW 1% 100 PPM/°C 0603 Thick Film Resistor R2
7   Wurth Electronik    430 182 095 816 1   100 430 182 095 816     SW1
8   Keystone Electronics Corp   5015    6   600 5015    SMT Micro Miniature test point  TP1, TP2, TP3, TP4, TP5, TP6

Breakout board for the TDK InvenSense ICP-10100 barometric pressure sensor. These sensors have a very high resolution, measuring pressure changes of as little as 1 Pascal, which is equivalent to a 8.5cm change in elevation.

Arduino library and KiCad design files available on Github

Contact me on Github if you are interested in fully populated breakout boards.

Microprocessor controlled switching power supply module. LM2596, MCP4725, INA226. 0-30V output with 10mV/1mA resolution.

More details here: http://stevenmerrifield.com/powersupply/index.html

Python powered GameBoy-compatible cartridge.

RPUno

ATmega328P based controller board with options for DIN mounts and 3.5mm connections. Eight digital I/O (10, 11, 12, 13, 14*, 15*, 16*, 17*) with level shift, the last four (*) are also analog channels (0..3). Four 22mA current source for use with loop sensors are also available with enables (5, 6, 3, 4). One 17mA current source for the pulse sensor with enable (7). ICP1 is pulled down when enough current (>7mA) arrives from the pulse sensor. Alternat power input may be enabled (9), and power to the shield VIN pin may be disabled (2). Power with 7 thru 36V DC.

GitHub Forum HackADay Tindie

New Improved Version - 1088XEL MPBI to IDE/CF Interface Board with Disk Swap Support

A small 2m/70cm diplexer rated at 10W for satellite work

Using Tabor Lab LPA setup for optogenetics.