ESP8266 ESP-12 minimal stabilized circuit schematic and PCB
With breadboard friendly headers and Wemos D1 mini pin numbers
Designed for battery operation:
MCP1700 or MCP1702 (250mA, 4uA quiescent current)
MCP1825 (500mA, 220uA quiescent current)
VIN: max. 6V
It will also work without the capacitors, but the voltage regulator will be less stable.
You can also solder a...
A collection of protoboard designs, all ready-to-order via your favourite PCB manufacturer.
Boards in the collection:
- Breadboard-compatible - all with power rails on both sides as well as extra holes and pads for connecting power:
- Small (15 rows of 2x5 points)
- Medium (30 rows of 2x5 points)
- Large (60 rows of 2x5 points) in two variants: a) with continuous power rails, b) with...
A 30-pin mini-breadboard with power input via Barrel Jack or microUSB. Top and bottom positive strips can be separate voltages or joined by a jumper. Bottom strip is powered from barrel jack. Top strip is powered from microUSB.
A derivative of the 30-pin breadboard by Johan_a.
Ultra-compact 33mm x 10mm board for DIY prototyping.
- STM32F030F4P6 or GD32F130F4P6 MCU
- SOT23 or SOT223 LDO
- VDDA out
If you dont need ADC:
- skip placement CM8, CM7, FB
- short both FB pads
- PA14 SWCLK
- PA13 SWDIO
- PA4 LED
A breadboard-compatible dual non-inverter audio amp built around an opamp.
Exposes most of its internals on pins for more versatility (variable gain, simple filter, ...). Some parts are optional.
Can be stacked to create a mixer with 1 board per stereo channel and 1 board for a master volume.
PCB Breadboard made to fit the pinout of the AdaFruit Feather Line (and other tiny boards and chipouts with a .9"/900mil DIP stance) without compromising on the number of open bus strip holes. also, adds additional bus strips down the middle of the board.