This TTL circuit is from a Radio Electronics magazine from February 1973. The circuit must be powered with 5 V and the maximum frequency depends on the TTL integrated circuit.
This circuit can be used with the CIR12053 receiver or with others shown in this section of the...
When the input of this circuit goes to high level, the LEDs start to flash alternately. The...
This circuit is from a 1965 Radio Electronics. The triggering transformer generates high voltage...