To further improve the PiRadio I created a PCB which addresses all components used and makes the cabling easier.

The PCB handles the power circuit based on the PowerBoost 1000C with the possibility to power-on/shutdown the Raspberry Pi with a simple button press (see https://github.com/NeonHorizon/lipopi/blob/master/README.power_up_power_down.md#a-simple-press-no-hold-power-up-version) and voltage monitoring of the battery (see https://github.com/craic/pi_power#voltage-monitoring-with-an-adc). The battery state is available by two leds.

Additionally the DAC Pins, the WS2812B LEDs Pins and the Button Pins can be connected directly.

For the Particle devices in the 3rd generation which are using the Adafruit Feather form factor I created a PCB to use a MCP23017 I/O Expander.

This PCB is inspired by the pilight PCB kit and supports the following components:

• pilight 433 MHz sender and receiver
  • with ATTiny low-pass-filter
  • SMA antenna connectors
• shutdown button
• IR-Receiver
• IR-Transmitter
• Status LED

Futhermore I designed and printed a 3D case for mounting the PCB better reachable positions.

To have a simple shield for the Raspberry Pi’s I created a Breakout for the GPIO headers. The Breakout is usable for alle generations of the Raspberry Pi by cutting along the marked line.

For different purposes I created a Breakout for the Particle Photon which can be used for mounting a Photon with and without headers. Both footprints are connected in parallel so a project can start with a Photon with headers and later use a soldered Photon without headers.