• Raspberry Pi 2 or 3 with soundcard in/out and some sensors
• BME680 = temperature, pressure, humidity, air quality sensor
• PM2.5 Air Quality Sensor
• enviro pHAT
• mpr121 capacitive/touch sensor (12)
• 3D tracking and gesture, RGB sensors
• software: python, puredata
• lcd displej and a bluetooth reproduktor

• Teensy + Prop shield (6DOF + 2 watt amp)
• all weather speaker 2-4 watt
• the megaphones (sd-card, record/loop, voice, aux)

Lately our mood turned into a quick live setup in the middle of the BBQ area with self-built devices: 4 split-stereo channels transmitted by 4 raspberry pi radio transmitters, received on 8 portable radios, mobile phones, tablets, … It is all working easily on usb-batteries with(out) a solar panel. A piece for green low voltage power and live musicians: let's go to Tempelhof and just play it! But how how how?

• https://howtoraspberrypi.com/create-radio-transmitter-raspberry-pi/
• https://www.raspberrypi.org/magpi/raspberry-pi-fm-transmitter/
• https://www.rtl-sdr.com/transmitting-fm-am-ssb-sstv-and-fsq-with-just-a-raspberry-pi/
• https://www.rtl-sdr.com/building-a-ham-tranceiver-with-an-rtl-sdr-raspberry-pi-and-rpitx/
• https://www.rtl-sdr.com/pitx-qrp-tx-shiled-for-wspr-on-20m-now-for-sale/
• https://www.tapr.org/kits_20M-wspr-pi.html
• https://gerolfziegenhain.wordpress.com/2013/04/13/raspi-as-wspr-transmitter/
• https://github.com/JamesP6000/WsprryPi
• https://docs.google.com/document/d/1bLKEDmJvKQegqUwDXEy3V7wQTqupIfyg2LkN0dOuPY4/edit
• https://qrp-labs.com/
• https://www.rtl-sdr.com/raspberry-pirate-radio-fm-transmitter/
• https://www.rtl-sdr.com/transmitting-datv-with-a-raspberry-pi/
• http://rfsparkling.com/qrpi/
• http://www.pabr.org/radio/leandvb/leandvb.en.html
• https://www.rtl-sdr.com/a-pocket-datv-transmitter-and-receiver-with-raspberry-pi-limesdr-mini-and-rtl-sdr/
• https://www.rtl-sdr.com/transmitting-dvbt-hdtv-raspberry-pi-rtl2832u/