Shared Projects

The AD5293 Digital Potentiometer is an SPI, 100K-ohm device. The potentiometer sports 1024 resistance steps. The digital logic power requires 2.7v to 5.5v. The potentiometer circuit operates with dual analog supply voltages from +/-9v to +/-16.5v. The pins act similarly to a passive resistive potentiometer, but require that voltages placed on any of the three pins not exceed the analog power supply voltages.

The Cedar Grove AD5293 custom breakout board provides power and signal connections for SPI and the potentiometer chip. The AD5293 is also used in the AD9833-based Cedar Grove Precision VCO Eurorack module. A CircuitPython driver is available: https://github.com/CedarGroveStudios/CircuitPython_AD5293

CST206-3A based Current Transformer Board for Dual-Resonance Solid-State Musical Tesla Coils.

FDD8424H DRSSTC Driver Bridge daughter board. This is like the V1 Driver Bridge, but it has split enable signals for freewheeling support using the DRSSTC Driver V5 Board.

UCC37322D DRSSTC Driver Bridge daughter board. This is like the V1 Driver Bridge, but it has split enable signals for freewheeling support using the DRSSTC Driver V5 Board.

This board has been superseded by a new DRSSTC V5.1 variant. It’s recommended that you use that version instead of this one.

Driver board for a Dual-Resonance Solid-State Musical Tesla Coil. This version is based on the DRSSTCDriver V3.2 design, but uses a CPLD for adding freewheeling support. For freewheeling, it requires a V2 Driver Bridge daughter board (either: UCC37322D V2 or FDD8424H V2 ).

ERRATA:

• U6, the footprint for the secondary (OPF2412T) fiber optic input, is rotated 180-degrees, due to a source footprint error. This causes pin 2 (VCC) and pin 6 (Data) to be swapped. Either leave it unpopulated (using only U7, the other format fiber optic input) or reloate it and swap the pins back.

• UVLO issue : The output of U9 (LM8365BALMF27) Vlo level is too high to properly trigger the CPLD Schmitt-trigger input due to the Vf drop of D14 and with the low impedance of R53 and R19, and is even worse when the TCDAQ is present as it adds to the low impedance of R53. Use a MBR0530 Schottky diode for D14 in place of the LL4148. Use a 100K resistor for R19 in place of the 1K and use a 10K resistor for R53 in place of the 1K.

There’s a Mezzanine Board available for fixing the OPF2412T footprint on this board. However, the better choice is to use the new V5.1 driver board linked above.

Keeps the trailer parking lights from flashing when using a turn signal by turning on the parking lights only when both taillights are on.

AiXun T3A soldering station input protection board (v1.1 - enlarged holes for mounting/connectors)

Can’t find that 74xxx part in DIP-14 but there’s a TSSOP-14 available? This little adapter will help you. It connects the pins 1:1.

This hardware is released under Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)

Want to use a 74ABT08 in a DIP14 form factor?

Compact carrier board for LB1836 low voltage DC motor driver, frequently used in Lego products at 4.5 V or 9 V.

Components: 1x LB1836 chip (1 mm pitch) 1x 350 mA 1206 PTC fuse 2x 0.1 uF 0603 capacitor 1x 47 uF 6.3 mm electrolytic capacitor (optional)

This motor driver can control two DC motors independently at 400 mA each, or one motor at 800 mA in parallel configuration. Solder jumpers are provided on the board for parallel output.