Arnab, Author at Circuits DIY

Simplest shortwave transmitter circuit ever

So, if you're looking for the the simplest and cheapest shortwave transmitter circuit, it's here. This transmitter is very low power and very stable as well, uses a readily available…

Arnab January 31, 2017

Basic Electronics

How to accurately measure low resistance with cheap Multimeter

We often need some low value resistors, less than 1 Ohm. Mostly as current sensing resistors in power electronics projects. You can't measure less then 1 Ohm with cheap multimeters.…

Arnab January 29, 2017

Basic Electronics

LM317 constant current source circuit design

A constant current source source can supply a fixed current to a load regardless of input voltage or load change. LM317 constant current source is one of the simplest design.…

Arnab January 26, 2017

Oscillator Others

What is dielectric resonator oscillator and it’s application

A dielectric resonator oscillator is basically a high frequency oscillator, operates within a range of few tens of gigahertz. The main frequency determining component is piece of dielectric material, usually…

Arnab January 23, 2017

LED Driver

HH004F LED driver circuit

HH004F is a low power integrated boost converter IC in a TO-92 package, look exactly like a small transistor. Though it's quite a uncommon and undocumented IC, but you may…

Arnab January 21, 2017

Basic Electronics PCB Making

Free PCB design software – Ultimate list of 2018

There's no short of free PCB design software to get your very own PCB ready. But which one should you choose ? Each of them have a fairly time consuming…

Arnab January 20, 2017

FM/AM Oscillator

FM transmitter circuit using C9018 transistor

FM transmitter circuit is a quite fun project for electronics beginners, so here's a circuit with the C9018 transistor. In a previous post I've wrote about a stable and simple…

Arnab January 13, 2017

FM/AM Oscillator

Stable miniature FM transmitter circuit

FM transmitter circuit projects are indeed quite popular among electronics hobbyists/students. But the frustrating part is most transmitters refuses to work at all, and secondly the internet is full of crappy…

Arnab January 5, 2017

Battery Basic Electronics Gadgets

Mobile charger circuit diagram, 100-220V AC

The market is flooded with cheap mobile charger circuit. Some of you may be looking for this type of charger circuit diagram and components list. These mobile chargers uses only…

Arnab December 29, 2016

Amplifier

TDA2003 amplifier circuit diagram 10 watt

TDA2003 is a robust automotive grade audio amplifier IC. It supports up to 28 volts of operating voltage and can withstand input voltage fluctuation of 40 volts. A TDA2003 amplifier…

Arnab December 24, 2016