This circuit was obtained from an American documentation of 1967. The circuit provides a 30 mA output current for driving standard Nixie indicator tubes at the time.
This circuit was obtained from HAM Radio magazine in an 80's issue. The FETs are types of the time...
This circuit shows how to control an astable configuration using the 555 IC. The control signal is...
This interesting circuit was found in a French publication from the 1980s. The circuit indicates when a...