This circuit keeps the neon lamp on for a moment when it receives a pulse. The turn on time depends on C. The transistor is of the old type, from the 60's, when the circuit was published.
This circuit was suggested by Texas Instruments in a 1980s documentation. The transistor must be...
This circuit was taken from a popular 90's Electronics. The LDR is mounted next to the LED to feed...
This circuit was obtained in an Argentine publication in 1976. It consists of a series voltage...