voltage controlled oscillator

This simple and inexpensive crystal oscillator consists of one-third of a 7404 IC, four resistors, and a crystal. The inverters are biased into their linear regions by resistors R1 to R4, while the crystal provides the necessary feedback. Oscillation...

When troubleshooting the 12V electrical system of an automobile, it is beneficial to have a simple voltage indicator tool instead of a voltmeter. This electronic circuit is powered by two AA batteries or two N cells, providing sufficient energy...

This general-purpose signal source is highly effective for signal-tracing applications. The output level is adjustable, exceeding 1 Vrms into a 50 Ω load. It is compatible with nearly any crystal in the 1 to 15 MHz frequency range. Q1...

This circuit is a simple design that outputs a voltage higher than the input. It can be used to power 12V or 9V devices from a 6V system or to operate 6V devices from a 1.5V battery. The circuit...

The schematic diagram below illustrates a circuit for a high voltage generator. This circuit employs a 4049 hex inverter as an oscillator, and it can be utilized for ignition purposes. The high voltage generator circuit is designed to convert a...

Integrated circuits (ICs) that require 3 or 6 volts can be powered from a battery or a fixed regulated supply with a higher voltage using the circuit illustrated. It is essential to mount the transistor on a heatsink, as...