We found this circuit in a Philips documentation from 1965. The circuit uses a common LDR sensor and the transistors are general purpose types. TR2 can be a BD135.
This circuit was found in General Electric documentation from 1964. It makes use of a PUT, called the...
This circuit uses a diode to generate white noise for various applications. One involves the...
This circuit is a reminder for drivers who leave the headlights on and the car does not have the...