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 Morse code practice circuit produces a tone at the speaker whose frequency depends on C1 and...
The figure shows the basic circuit of a relaxation oscillator with operational amplifier. The...
This circuit was obtained in an American publication of 1970, making use of components of the...