a2afbhelp@gmail.com 
Hey friend, if you’ve ever wanted a solid, adjustable bench power supply that can swing from 1.2 V all the way up to 35 V and still push a full 10 amps without crying, this classic UC3845 + TIP35C design is still one of the best DIY kings. I’ve built probably a dozen variations of … Read more
Hey friend, if you’ve ever dreamed of pulling in stations from Europe, Cuba, or pirate broadcasters on a radio you built with literally two transistors and a handful of parts, this little gem is going to blow your mind. I’ve been chasing shortwave signals for over thirty years, and this exact two-transistor regenerative circuit covers … Read more
Controlling the temperature of a soldering iron is essential for safe, clean, and professional solder joints. Overheated tips can damage components and circuit boards, while underheating leads to cold, unreliable connections. Commercial temperature-controlled soldering stations are often expensive, but you can achieve accurate control with a simple electronic circuit. This article demystifies a proven soldering … Read more
Electric fencing offers a practical way to secure properties, keep livestock in, and keep intruders or wild animals out. Understanding how an electric fencing circuit works—especially as shown in the provided diagram—can help you build a safer, more effective, and reliable barrier on your land. This article breaks down the essentials: how the circuit works, … Read more
Hi Friends, I’ve built a few high-voltage projects in my time, and this circuit is a classic example of how a 9-volt battery can be transformed into a spark-shooting beast. Let’s tear it apart, explain every resistor and transistor, and talk about what actually works, what’s sketchy, and how you can experiment safely on your … Read more
Hey friend, if you have ever wanted to pull AM broadcasts out of thin air with nothing more than a single CMOS IC and a few passive parts, this CD4049-based AM radio circuit is pure electronics magic. I have been building radio projects for decades as an engineer, and designs like this one The star … Read more
Hey friend, if you are looking for a reliable way to power your small electronics projects with a steady 5V at up to 2 amps, building a simple switch-mode power supply (SMPS) is a smart move. I have designed and troubleshot plenty of these as an electronics engineer, and they are efficient, compact, and way … Read more
Hey friend, if you have ever wanted to drive a speaker with clean, punchy sound from a simple audio source, this 60-watt MOSFET amplifier is one of the most satisfying projects you can tackle. I have built variations of this design for years as an electronics engineer, and the schematic we are looking at really … Read more
Hey friend, if you have ever needed a high voltage supply for something like a Geiger counter, a small Nixie tube display, or even some experimental projects, a 9V to 400V DC to DC converter can be a handy tool to have in your electronics arsenal. As an experienced electronics engineer, I have built several … Read more
Hey friend, if you have ever wanted to tune into your local FM stations with something you built yourself, this simple FM radio receiver circuit is a fantastic place to start. I have tinkered with radio projects for years as an electronics engineer, and designs like this one bring back memories of my first experiments. … Read more