Simple Water Level Alarm Circuit using IC 555

In this article we talk about an easy water level alarm circuit using a 555 timer designed to generate an audible alarm as soon as the water level reaches a predetermined stage. The circuit could be powered through a 3V battery and is extremely hassle-free to work with. The circuit is dependent on an astable […]

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Proximity Detector Circuit – LC Tuned IC CS209

The post details an LC tuned proximity detector circuit, using a LC tank circuits and the IC CS209A This is a straightforward proximity switch circuit using IC CS209. The CS209A is actually a bipolar monolithic integrated circuit for use in metal detection / proximity detection purposes. The CS209A consists of an oscillator set up through […]

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Metal Detector Circuit using a Single IC

In this post we learn how to make a simplest metal detector circuit using a single CMOS IC 40106 Simple metal detector circuit The metal detection circuit displayed here might reveal the limitations of the simpleness of a metal detector, however the design performs remarkably well. It works with a single 40106 hexadecimal incinerator, a […]

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Mains Wiring Phase, Neutral, Earthing Tester Circuit

The post discusses a circuit which can be used for testing mains wiring phase, neutral, earthing line faults simply through 3 neon lamp illumination with a specified pattern, let’s learn the details. In this article we include yet one more easy circuit, which involves a couple of neon lamps (with integrated series resistors) a push-button […]

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Anti-Burglar Home Lighting Circuit

In this post we study how to make an anti-theft anti burglar automatic light for homes, which will randomly switch ON-OFF at some predetermined delays and patterns, causing an impression to a stalking burglar that the house may not be empty rather occupied by habitants due to the automatic light switching. Burglars in many cases […]

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How to Charge a Li-Ion Battery Correctly and Safely

The post details the correct method of charging a Li-Ion battery with safe parameters. Let’s learn the main points below: The recommended charging rate of an Li-Ion Cell is between 0.5C and 1C; the full charge period is approximately TWO TO THREE hours. In “1C”, “C” refers to the AH or the mAH value of […]

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Simple Constant Current Battery Charger Circuits

In this post we study the method of making 3 simple constant current battery charger circuits, first one merely utilizes a single resistor, the second design incorporates a single Darlington BJT, while the 3rd circuit employs the IC LM317 for implementing the proposed current controlled charging of the connected batteries A straightforward way of charging […]

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Automatic Day Night Triggered Car Headlamp Circuit

In this post we learn how to make a simple automatic day night activated car headlamp circuit. The circuit uses a LDR for sensing darkness and daylight and results in the respective switching. This devices activates the car’s headlights as soon as evening falls and turns them down once the day time comes back. The […]

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Automatic Solar Charger Circuit Single Transistor

In this post we discuss elaborately an automatic solar charger circuit using a single transistor relay circuit. Simple Charger using a Battery and Solar panel A solar panel can certainly be applied to directly charge a battery with virtually no other elements. Just hook up the panel with the battery and it can charge once […]

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