As far as I know this may be the easiest and high quality FM radio circuit that could be built by any new hobbyist. In addition, this circuit’s FM reception […]
Designing a IC 723 Power Supply with Variable Voltage and Current
The article provides tips and design considerations regarding building a well optimized IC 723 regulated power supply circuit. IC L146 is the improved version of IC 723 which can be […]
Musical Doorbell Circuit with Many Melodies – Christmas Carols, Big Ben, and More
As seen in the diagram the main stages of the circuit is built-in inside the musical chip in the form of oscillator, frequency divider, drive ROM, a ROM having 512 […]
Two Transistor Voltage Doubler Circuit
The following small circuit will create a DC output that may be nearly 2 times the supply voltage. A square wave input is necessary of adequate amount to switch T1 […]
1 Hz to 1 MHz Frequency Reference Generator Circuit
This circuit is a universal frequency generator, you can use it for many frequency and time period testing applications, so it is quite flexible. It is mainly suited for gate […]
20 Easy IC 555 Circuits for Students and New Hobbyists
In this post we learn how to build 20 simple IC 555 based application circuits which for many useful purposes. This post begins by looking at the 555 as the […]