Shared Projects

AB optical gear encoder with homing. Compatible with Arduino Pro Mini, Teensy and Adafruit Feather

This switching regulator board is a cool-running, inexpensive drop-in replacement for TO-220 linear regulators such as 7805 (5V) or LM1117/LM3940/etc. (3.3V). You can change between these voltages by selecting different variants of the regulator IC. Bill of Materials and more info at http://tim.cexx.org/?p=1471

Quick and dirty IV-6 VFD tube breakout board.

Order as 0.8 mm 2 oz/in²

Should be good to about 12 A continous for a temperature rise less than 40 K (IPC-2221, 6 A, 2 oz/in,² internal layers)

batter power data logger for a RPi zero. 1 channel voltage/current/power monitoring 36V max. Voltage only channels 3x 4V max, 3x 6V max, 2x 15V max.

Test of Cypress' S27KL0641 3V3 8 MByte Hyper PSRAM as an SRAM augmentation for STM32L4 MCUs. https://www.cypress.com/file/183506/download

Sourdough Breadboard Adapter for Adafruit Powerboost 1000. Supplies 5V from the powerboost, and 3V3 from an onboard voltage regulator to your breadboard power rails.

VREG is NCP-1117, fused and filtered power input via micro usb.

UNTESTED!!!

This shim can (potentially) be mounted in place of 153-ball eMMC and allow the use of a MicroSD card using the molex 0475710001 microSD reader

Omnitec/GreenLine Motor Controller v1.0

CM600 Shield v0.2

The Scout ESC is an open-source, dual brushed-motor speed controller that accepts both standard RC inputs or logic-level serial commands. The onboard processor is an ATmega 328 and can be programmed with the Arduino IDE using a standard FTDI cable or adapter (precompiled firmwares can also be downloaded and flashed to the Scout using the OP Config program). It operates at ultrasonic frequencies (no motor whine), at voltages up to 16 volts, and is rated at 12 amps continuous per motor without heatsinking, but the addition of a fan can increase the current capacity (30 amps max, requires serial commands to increase overcurrent limit beyond 12 amps). The Scout has its own onboard fan controller that can drive any standard 12 volt, 2-pin PC case fan (the 40mm size works well). The board has over-temperature protection, over and under-voltage protection, over-current protection, and is reverse-polarity protected. Current and voltage limits can be adjusted via serial commands.

The Scout was designed with the Open Panzer Tank Control Board (TCB) in mind and requires no special setup in that application other than to plug and play. It is the perfect size for controlling even the heaviest 1/16th scale RC tanks. For more details on connecting the Scout and TCB together see the Serial Motor Controller page of the TCB Wiki.

The Scout can also be used in many other applications including robotics. You can think of it as an open-source variant of the Dimension Engineering Sabertooth 2x12 or the Pololu Qik 2s12v10.

Resources

• For instructions, firmware, Eagle board files, schematics, bill of materials, and a sample Arduino library, see the Scout repository at the Open Panzer GitHub site.

Revision 11 - Updated 9/5/2019 - Uses VNH5019 motor driver ICs

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Arduino Shield V3.0 for 20-bit DAC/16-bit ADC (dual card) boards

Github Repo

Version 1 of mini picc pcb

MK22-LQFP Breakout

Breakout board for Amphenol RJMG1BD3B8K1ANR Magjack. See source repository and blog post.