Finally decided to sew all kinds of small electronic experiments on fabric. Easy for display and quite handy for transport in a box in my bag on my bike.
From very simple circuit demo's and soft buttons all the way to energy harvesting chips.
Most on 3.3V - coin cell battery, some on 4V lipo battery and a few on 9V.
All provided with switches.
Most microcontrollers ATtiny85, some ProMini's and some just transistors.
Light: LDR, temperature LM-37, MQ pollution sensors, touch sensors.
All images of the swatches can be found here: