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Development and breakout boards for use in Arduino projects, with Gerbers.
An ATtiny84 development board with FTDI interface. Works very well with Optiboot, in particular with the ATTinyCore. (Top, in picture.)
Same as t84opti, except with ATtiny85, and no LED_BUILTIN. (Bottom, in picture.)
A breadboard adapter for the nrf24l01 short-range wireless module. (Right, in picture.)
A breadboard adapter for the ncp1402 step-up switching regulator ("boost converter"). (Left, in picture.) Warning: SMD soldering required!
A Raspberry Pi "hat" containing an SPI-connected nrf24l01+ radio, two status LEDs and a shutdown button.
A shield for the popular Wemos D1 Mini ESP8266 board containing an SPI-connected nrf24l01+ radio.