This circuit appeared in the 1991 Electronics Experimenter Handbook. The circuit is for remote controls of the time that are slower than today's and may not work with modern types.
This circuit generates a pulse of approximately 1 second when the light incident on the sensor...
The 3403 operational amplifier is not common today, but the configuration can be implemented with...
This circuit, published in 1978, can use any general purpose NPN transistor such as the BC548 and...