Arup, Author at Circuits DIY

Simple contactless water level indicator project

Water level indicator is a very easy electronics project. Water tank overflow as well as tank exhausting without any previous clue is a common household issue which we have to…

Arup April 15, 2020

Others

Repair TP-Link TL-WR740N Router WAN port

This article describes how I repaired my router which had burnt WAN port at no cost.

Arup April 10, 2020

Others

Reduce Refrigerator bills with this Simple circuit

Refrigerator is a common household electrical appliance. When we buy refrigerator we try to minimize the electrical power consumption by looking for BEE 4 or 5 star rated ones which…

Arup April 7, 2020

LED Driver

Directly Drive LED array from 230V AC

LEDs are DC devices, operating from a few volts of direct current. Where power is supplied by a DC battery like mobile phone, or torch, you can easily run LEDs.…

Arup January 24, 2017

Amplifier Gadgets

Simple dekstop audio amplifier by A6283 I.C

I got two creative speakers from a friend who didn't need that. Since they are only speakers, and not with inbuilt amplifiers, it's not possible to run those speakers from PC/mobile…

Arup December 12, 2016

Others Solar Projects

Zero drop dusk to dawn solar charge controller by Sandeep

When you work with solar panels, you don't just need a panel to supply power, battery to store power and lights to glow, you will always need a good charge…

Arup October 4, 2013

Gadgets

Inside a $10 phone

Last week I bought a cheap china phone as my primary phone went to service center for 3 days. It's this: http://icellmobiles.com/product_detail.php?&getID=133 I got the phone for Rs.500 (~US$8.4) including…

Arup July 4, 2013

Site news

Happy New year & Intro:BuyCircuitsOnline

We wish all our readers a happy and prosperous new year. We wish to do more experiments/engineering this year. In this new year occasion, a new website is launched from…

Arup January 1, 2013

Site news

USB li-ion charger built by Jamie

Jamie Navarro built a USB li-ion charger on breadboard. Now he is working to get it fine tuned to accurate voltage levels. He scored a free PCB for this. Wish…

Arup November 29, 2012

AVR

Failed Prototype: VAmeter v3

Just a few days ago the PCBs for VAmeter v3 came in. VAmeter is a simple board that connects to your existing power supply and shows the volatge, current, etc.…

Arup November 14, 2012