We found this circuit in an old documentation. Its purpose is to turn on warning lights when the vehicle in a garage touches or passes a sensing bar preventing it from hitting the wall.
Can be used as a shield, this old American documentation circuit offers digitally selected...
For 220 pF C1 this circuit generates a 10 MHz signal. Other frequencies can be obtained with...
This low power bass booster is from the 1977 National Semiconductor Audio Handbook. The circuit is...