IR Sensor with 741 (CB25575E)

This circuit can be used to obtain control signals from an infrared emitting source. The circuit is from Electronics Now magazine from May 1993.

Photo alarm with the 555 (CB6854E)
This traditional configuration with the 555 was obtained in an 80s Hands-On Electronics. The relay...
Gas LASER Supply (CB7227E)
This circuit found in 1969 Popular Electronics is used to power a gas laser. The circuit produces...
Alternating Voltage Regulator (CB1581E )
National Semiconductor suggests the figure circuit for stabilizing the peak value of an...