Free Simple Circuit Diagram

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Simple pH Meter Circuit, A Low Cost Adapter for Your Digital Voltmeter

What is A pH Meter? A pH meter is actually a precise voltmeter  that measures the generated voltage of a pH electrodes. The requirement of such meter is high input impedance and has the gain of  voltage-pH conversion. The standard pH probe generate voltage about 59 mV per pH,  so all we …

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5V Switching Regulator, Very Simple Circuit

Switching Regulator for High Power Efficiency When you should regulate a high voltage to a much lower voltage, switching regulator must be the only choice. Fortunately,  a simple switcher integrated circuit chip is available, let you build a complete step-down switching regulator using five components. The switching regulator IC used in …

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Hydrophone Pre-Amplifier Circuit

Hydrophone is a tool like microphone, but this tool is used in the underwater environment. When used to pick up a sound on the air then this tool becomes less sensitive because it’s mechanical-acoustical properties is designed to match the Acoustical impedance of water. Circuit shown in this article is the hydrophones …

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Op-Amp Circuit: Difference Amplifier

This is a circuit of difference amplifier. This circuit is an inverting amplifier that allows the subtraction of two voltages and that is the summing amplifier’s complement.This circuit also allows the the cancellation of a signal common to the two inputs.This circuit can be used as a computational amplifier, in in rejecting a common mode …

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Op-Amp Circuit: Summing Amplifier

This is a summing amplifier circuit. This is an inverting circuit that provides an inverted output equal to the sum of all three input. This circuit has some advantages such as there is no interaction between the operation and inputs, and also it is very easily to implement the weighted averaging and summing on this …

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Super Simple Inverter

This is example of a simple inverter that can be used to power fluorescent lamp and a small strobe. This circuit will produce over 400VDC from a 12 VDC, 2.5 A power supply or marine battery or an auto. This circuit is very simple because it does not require custom transformers or coils. Also all …

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