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Optical Air Bubble Sensor
T.K. Hareendran - 07/01/24
Air bubble sensors are used to detect air or gas bubbles in flexible clear plastic tubes. They are [...]
Programmable Unijunction Transistor (PUT) – A Quick Rescript
T.K. Hareendran - 06/22/24
What is a Programmable Unijunction Transistor (PUT)? Simple – it is a three-lead electronic semiconductor device, similar to [...]
Microwave Based Presence Detector
T.K. Hareendran - 06/22/24
Detection using today's microwave sensors has some advantages. Unlike traditional passive infrared motion sensors, most microwave sensors can [...]
ICL8038 Nostalgia
T.K. Hareendran - 06/16/24
The ICL8038 precision waveform generator/voltage-controlled oscillator chip is obsolete and has not been made for years! The ICL8038CCPD [...]
9V USB Li-ion Battery Teardown
T.K. Hareendran - 06/15/24
In this article, I will take apart a Li-ion alternative to the classic 6F22 9V battery. This battery [...]
Proportional Solenoid Valve
T.K. Hareendran - 05/25/24
A proportional solenoid valve is an electromagnetic valve designed to respond to a variable power input to regulate [...]
Precision Current Source
T.K. Hareendran - 05/25/24
Current sources are widely used in industrial control systems to transport analog process signals over long distances, but [...]
Marker Generator
T.K. Hareendran - 05/25/24
It may sound odd, but a home-brewed marker generator can be useful in many situations. Let us see [...]
Bilge Pump Controller
T.K. Hareendran - 05/25/24
The primary job of most bilge pumps on most boats is to clear infliction water from the bilges [...]
DIY SAD Lamp
T.K. Hareendran - 04/29/24
This post is about a SAD Lamp construction project that I recently attempted. Winter Blues & SAD Lamps [...]
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