DIY electronics

A cost-effective, compact amp using the NE5532 op-amp, providing clean, high-quality audio for headphones and as a buffer with gain in audio systems. It avoids the complexity of tube and transistor amps.

Many of us program microcontrollers and know that counters and timers are important parts of them. But not everyone remembers that they are also produced in the form of separate ICs, and once upon a time counters were assembled using flip-flops and logic elements.

Welcome to my guitar effects workshop! This scheme is already 46 years old. If you want tons of vintage mojo, you should consider assembling of this guitar pedal.

Let's assemble a completely analog PWM LED brightness controller using four operational amplifiers and figure out why PWM is needed and what it is.

What do you do when the controller doesn't have many pins to connect buttons, indicators, relays, etc.?

When it comes to clean guitar tone, we all think of Fender amps. And the overdriven sound is, of course, Marshall. Can a small transistor pedal replace a real tube amp? - Let's try and listen!

In this second part, we'll examine how to transform a successfully prototyped idea into a physical product. Several key aspects need to be reconsidered.

Sometimes, when making your own devices on microcontrollers, there is a need to display huge amounts of information on a display and to use a bigger screen for ease of perception. Unfortunately, there are no ready-made and budget-friendly solutions for this task on the market.

To make a good AM radio, one transistor is enough. It can amplify both radio frequency and audio signal. It is called a reflex circuit, and it shows excellent results.

It was the very first all-transistor commercial radio in the United States and in the world. How much have circuits and enclosure designs changed in 69 years?