LED board for 3D Printed Ghostbusters PKE Meter for Arduino on thingverse.

https://www.thingiverse.com/thing:2338494

A Mother4X Compatible Expansion Port Connector for the Amstrad / Schneider CPC 464.

Use an angled 2x50 Card Edge Connector for CPC 464 expansion port connector, and a 2x25 Shrouded IDC Box header (male), or a 2x25 Female Pin Header to plug in a M4X compatible CPC expansion card. Notice that the expansion port is all pass through, so you don’t lose the port.

A Breadboard Breakout Cobbler for Amstrad / Schneider CPC Computers.

Use a 2 X 25 IDC (male) box header, and 50pin flat ribbon cable to connect to CPC. Use 2 single 2 25pin headers pointing downward to connect to breadboard.

Use a rotary encoder to switch Neopixels between different patterns.

https://github.com/benjibritt/rotary-encoder-controlled-neopixels

http://fritzing.org/projects/rotary-encoder-controlled-neopixels#

version 1 Carrier board for VCS-ES interface boards.

Please use new revision found here: https://oshpark.com/shared_projects/WhLjVooT

This has only been tested on 1 board, use at your own risk. If you do not get sync, try adjusting R23. Wire up a pot to make it easier. There are now 3 jumpers. These are for a non-pot install. Change R5/R17/R18 to X values. I haven’t done enough testing (only installed in one machine) if these are static for all models.

RPUlux

Controller board with six AL8805 constant current drivers connected to PWM pins of an ATmega328p. Analog channels ADC0, ADC1, and ADC2 and an N-CH MOSFET that may be used to sink a few amps of current. Two 22mA current source for various task. ADC6 measures input power (7 thru 36V DC) and ADC7 measures input current. SHLD_VIN pin which is used to power a shield can be disabled with IO2 (so it can power off a Pi Zero on the RPUpi shield)

GitHub Forum

Simple and useable Arduino shield for teaching surface mount soldering techniques.

Cartucho con memoria de 512 Kb para 32 roms de ZX Spectrum 48K para interfase 2

One of the final beta versions of my RC motor controller circuit. This one allows the ECM to be plugged in at the top, and the Arduino (or a jumper as a manual option) to plug in to the bottom. BOM is included on the board.

For more information, contact me at: [email protected] https://techelpr.com

Main purpose is to break everything out to 0.1" and 2x3 IDCs for analogues for easy connectivity to pots, etc. Use pot breakouts for other end.

DIP adapter for 150 or 208 mil SOIC-8 packages. Bottom side has pads connecting to pins 4 and 8, where common memory and op-amp pinouts want a decoupling cap.

Enlarged connector pads for a better solder connection

A simple LED power circuit for driving LED’s from AC voltage up to 22 volts. It is intended for use for AC powered model trains.

This circuit can be configured for constant voltage or constant current. It also includes an input RF choke for MTH DCS compatibility.

RefDes Value Name Manufacturer C1 100uf 35V UWT1V101MCL1GS Nichicon D1 1.2A MDB10SV Fairchild L1 22uh IND_3218 Taiyo Yuden R1 Note 2 RES_0805 RES_0805 R2 Note 1 RES_0805 RES_0805 U1 LM317MBSTT3 ON Semiconductor

An LTZ1000-based 7V reference, based on the circuits of Andreas of the EEVBlog forum.

See http://www.eevblog.com/forum/metrology/px-reference/ and https://github.com/pepaslabs/px-ref/tree/master/kicad/releases/v2.2b

The “b” variant uses two discrete resistors for R4/R5, rather than a divider. The footprints are directly adjacent, so that the resistors can be thermally bonded.