Found in a Popular Electronics from the 80's, this circuit simulates the equivalent card game. The circuit is CMOS and can be supplied with voltages from 6 to 12 V.
This 1965 Philips circuit uses old company transistors like the BFY51 and BFY50. The circuit is...
This circuit with an operational amplifier was found in the magazine Radio Electronics of...
This trigger produces an output pulse when zeroing the input signal. The circuit is from a...