This circuit was obtained from HAM Radio magazine in an 80's issue. The FETs are types of the time and the frequency is determined by the crystal. The circuit operates at voltages from 3 to 9 V.
This circuit was obtained in a 1991 Electronics Handbook of 1991. The publication no longer...
This fast RGB multiplexer circuit was found in a Linear Technology manual from the 1990s. The...
This circuit is from a Hands-On Electronics from 1987, but it can still be easily assembled, as...