5 Input Microphone Mixer Amplifier Circuit using a Single IC

This circuit enables the user to blend in one 5 separate signals from 5 dynamic low-impedance microphones and a couple of external auxiliary inputs, which can be electret-type microphones or even actually amplified inputs for example those from your CD player or a phone. The circuit really is easy and is made up of feedback […]

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220V Light Dimmer Circuit using Push Button Control

The following circuit can be effortlessly used for dimming a 220V or 120V mains operated lamp or fan using a single push button operation. Referring to the given figure, the IC ┬áNB7332 is an advanced frequency generator which changes its high frequency pulse range to alter the triac’s switching pattern such that for lower power […]

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Cellphone Power Bank Circuit you can Make at Home

This simple cellphone power bank circuit charger can be built at home and used for emergency charging your cell phone anytime anyplace regardless of an AC mains outlet or input availability. The idea is all about using a 4 AAA N-Cd cells in series and then keeping it fully charged through a suitable SMPS charger […]

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How to Calculate Capacitor Series Parallel Connections

In this article we will learn the formulas for calculating capacitors connected in series and parallel, and also understand regarding the various parameters associated with capacitors in electrical circuits, in conjunction with inductors. Capacitance which denoted as C and measured in Farads is internally made up of two identical parallel plates. The various parameters associated […]

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Simple Microphone Amplifier Circuit with Bass Treble

The post details regarding a simple microphone (MIC) amplifier circuit which includes built in bass and treble control feature. The active components of the circuit (amplifiers A1 and A2) proven in figure 1 are within IC1. A1 runs as a non-inverting amplifier along with the microphone input is given to pin 1 through coupling capacitor […]

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Water Level Controller using a Single SCR

The water level controller circuit explained here uses just a couple of parts including a single SCR for implementing the sensing as well as controlling water levels. The circuit can also be used as a rain alarm circuit. By using this circuit we can now perform the activation of a warning process each time the […]

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Diesel Engine Delay Start Circuit

In this post we make a simple delay start circuit for diesel engines in order to enable a proper preheat It happens to be well known that diesel engines need a preheating delay time of approximately 5 seconds. When we attempt to start the engine with the cold diesel it is not going to not […]

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Simple 40 watt Fluorescent Tube Emergency Light Circuit

This simple 40 watt fluorescent tube emergency light circuit permits one to hook up a fluorescent tube up to 40w in a vehicle or any other 12v source. It is well suited for camping, motor homes and cabins intended for trucks or buses. Because of its minimal consumption it can be applied as a complimentary […]

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