Shared Projects

Simple JTAG adapter, may work to connect ESP-PROG to a D1 Mini32 board.

(NOTE: YOU MUST VERIFY DESIGN YOURSELF BEFORE USE.)

Fits even with Ethernet Shield

Fits with TwilightLord’s ethernet shield. May also fit with other ethernet shields.

Normally-open solder jumper for 3v3

The ESP-PROG does not appear to require this to be connected. Check your debugger board to see if they require this (e.g., to detect which level signal to output).

JTAG header may be soldered on either top or bottom

Due to space constraints, the center two pins are shared, so only one JTAG header can be attached per board.

Used pins are marked with silkscreen

• Circle for the four JTAG signal pins: TDI, TDO, TCK, TMS
• Square for ground pins (note: only on bottom of board until v1.5)
• Dashed-circle for optional 3v3 pin

Other Parts (BOM)

A through-hole 1.27mm JTAG connector (keyed IDC box header) is the only non-obvious part. An example description might be CONN HEADER VERT 10POS 1.27MM or similar. Two examples:

• LCSC: Wcon 3130-10SG0BK00T1
• Digikey: CNC Tech 3220-10-0100-00

You likely also want standard 0.1" pins or sockets, to allow you to stack this board onto an existing ESP32 D1 Mini board. Specifics will vary by use case, so those 0.1" headers / sockets are not listed here.

Adapter PCB for Gottlieb Pinball

See: https://github.com/joeyoravec/stargate/wiki

Can be used with most USB to Serial TTL adapters. The standard CH340 adapters tend to be a great option (if it has an Rx LED, you may need to physically disable that). This programmer is my favorite as it doesn’t require any modifications. I usually order these as 0.8mm thickness option. I solder straight header pins flat to the board and then cover with clear heat shrink.

• R470 is a 0805-sized 470 Ohm resistor (or any value in that range)
• DIODE is a SOD-323 Schottky diode such as BAT54WS, 1N4148WS, or B5819WS
• Uses 3x P50-B1 pogo pins
• Heatshrink (optional but highly recommended): clear 7mm (9/32") tubing

This has an error in the silkscreen (the RX and TX text is mirrored). Please see this project for the corrected version.

A multivoltage power supply

BJT lab panel. Tactile switches are TL3215 series illuminated, pushbutton switches (momentary??/latching??). Vo for typical output grounding, and Vo (hi) for amplified output grounding (ie: for use with a buck converter).

This file is outdated, contact Thomas Bennett for updated file link

Replaces 20V barrel jack with a USB-C PD port!

IC1 2114 SRAM IC2 6116 SRAM Untested yet should work just fine.

Based off prior work by Jules Ryckebusch and Scott Helmke. Small OPA1642 amplifier for a (presumably) TSB-160A electret capsule.

Lens Tab Fixture at IIDU

A minimal breakout board based on the Raspberry Pi RP2040 processor.

See http://www.technoblogy.com/show?3U75.

Op amp lab panel. Tactile switches are TL3215. Op amp footprint fits most single op amp footprints. High output pins are for amplified output for high return impedance using watt resistors.