The thermal detonator was made of painted resin casting resin. In its interior a ATTiny communicates with a sound module that has stored the tracks on an SD card. The ATTiny ensures the triggering of different sounds (Enable continuous loop , disable) and makes the LEDs blink synchronously and alternately by a random generator.
The upper shell is secured with a bayonet fitting and can be removed to switch the batteries.
Demonstration of the final built.
Initial tests of the electronic component. For application comes a SD card sound module and an ATtiny13. The voltage supply is provided by two LR1 batteries. The small installation space is a particular challenge of this project…