Screen Shot 2016-10-19 at 3.31.35 PMOct 19

Projector Hushbox with the STM32F4 – Hardware

In my family, we’ve never had a normal television set, using projectors for our entertainment […]
smoke system for electric aircraft

Desktop Smoke Generator

T.K. Hareendran - 10/13/2016

I recently decided to do some research on electric smoke generators and was surprised to learn that ready-made [...]
8. lm35_setup

Arduino Datalogger with Memory Card

T.K. Hareendran - 10/04/2016

How do you save data from an Arduino-based device to a memory card? Fortunately, a microSD card and [...]
lipo charger circuit

Compact 2S LiPo Battery Charger

T.K. Hareendran - 09/28/2016

The compact LiPo battery charger introduced here can be used to charge almost all standard 2S LiPo battery [...]

Arduino Visual Basic Integration

T.K. Hareendran - 09/22/2016

Usually, I use the Serial Monitor of the Arduino IDE to communicate with the Arduino hardware. But now, [...]
blackcout alert circuit

Intelligent Blackout Notifier

T.K. Hareendran - 08/27/2016

The intelligent blackout notifier is a mains supply monitoring device that will trigger a distinct alarm when the mains supply cuts off. The system, based on a tiny microcontroller module and a handful of other [...]

Automatic Fragrance Dispenser Circuit

T.K. Hareendran - 08/10/2016

I am building an automatic fragrance dispenser (AFD) from scratch and, because I am a little crazy, I [...]
toilet cistern overflow monitor schematic

Retrofit Toilet Cistern Overflow Monitor

T.K. Hareendran - 08/01/2016

Toilet cistern overflows not only waste water but increase the risk for slip-and-fall injuries. The retrofit cistern overflow [...]

Wireless Remote Camera Flash Trigger

T.K. Hareendran - 07/25/2016

Here is an efficient and economical circuit for a wireless remote camera flash trigger, useful for capturing scenes [...]
water pump guard schematic

Air Cooler Water Pump Guard

T.K. Hareendran - 07/17/2016

Compact, submersible water pumps are mostly used on air coolers, aquariums, and fountains. If the pump runs out [...]
live fence tester

Cordless Live Fence Tester

T.K. Hareendran - 07/11/2016

Electrified fencing is usually used to control animals with smaller and cheaper fence constructions than would otherwise be necessary with non-electrified wires. A typical live fence installation has a long wire or wires starting from [...]


T.K. Hareendran - 07/08/2016

Every non-battery-powered electronic device requires converting offline ac power to some dc voltage for powering electronics. Nowadays, efficient [...]
Solar Window Charger Schematic

Solar Window Charger Circuit

T.K. Hareendran - 06/30/2016

Solar window chargers have several advantages when compared with other charger types. You can stick this DIY solar [...]
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