A cellphone or mobile phone detector is actually a high gain op amp amplifier which detects slightest of RF disturbance from a mobile phone, and illuminates an LED. NOTE: This […]
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How to Make Car LED Chasing Tail Light, Brake Light Circuit
The circuit explained here is presented in response to a request sent by one of the avid readers of this blog. The proposed circuit is of a sequential LED light […]
Build Simple Transistor Circuits
A compilation of important assorted transistor simple circuits to build has been included here. Simple Transistor Circuits for New Hobbyists Many simple transistor configurations like, rain alarm, delay timer, set […]
16 Easy IC 741 Op Amp Circuits Explained
The 16 fundamental IC 741 based op amp circuits presented here are not only interesting but also very amusing to build. The included circuit ideas like inverting and non-inverting amplifiers, […]
Make a Simplest Temperature Indicator Circuit
A very simple temperature indicator circuit can be built by interconnecting a single transistor, a diode and a few other passive components. Using Transistor as a Heat Sensor As we […]
3 Accurate Refrigerator Thermostat Circuits – Electronic Solid-State
Interested to make an accurate electronic thermostat for your refrigerator? The 3 unique solid state thermostat designs described in this article will surprise you with their “cool” performances. Design#1: Introduction […]