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.
We found this circuit in an English publication from 1980. The transistor can be either the BC548...
This power supply is indicated to power small loads up to 30 mA. The original output voltage is 6...
This is a amplifier for XTAL high impedance earphones or piezoelectric types. Current drain is...