This game aims to make you discover which is the combination of activated switches that make the LEDs light up. The circuit is powered by batteries or cells.
The current of this source is 200 mA at the most, and the output depends on the zener that may...
Found in a 1970 documentation, this SCR bistable can be implemented with modern equivalent SCRs. Observe...
This circuit produces sounds that depend on the measured voltage and that can be compared with a...