Wednesday, January 17, 2018
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Mini Mic Pre-Amplifier Circuit based IC LM358

The following diagram is a easy to build, simple and low cost mic pre-amp circuit which build using op-amp chip of LM358. Component Parts List: R1, R3, R4 = 10K R2 = 1K R5 = 100K-1M Potensiometer C1 = 0.1uF C2 = 4.7uF/16V IC1 = LM358 dual op-amplifier Mic = Electret MicrophoneNotes: Vary the variable resistor of R5 to adjust the gain of op-amplifier IC LM358. The...

LM723 and 7812 based Top Linear power supply regulator 5V 5A circuit

This ciruit Top Linear power supply regulator 5V 5A. It is good power supply circuit than IC 7805+MJ2955( regulator 5V 5A ) . Use IC 7812 and LM723 regulator IC, Thansistor TIP142 for boost current to 8A max. P1 for Control Volt output 2.5-7V,Transformer 10A min. Detail other see in picture citcuit.  

LM317 based Adjustable Regulator For battery 9V circuit with explanation

LM317 Easy Adjustable Supply Regulator From battery 9V Here’s how to build a simple LM317 or LM117 or LM217 based power supply. writes: “Being able to poke voltages into your projects will help you debug. You can buy an adjustable power supply for $50 or so, or build your own from a kit. You can also build it...

LM723,CA3140,2N3055 based Variable Regulator 0-30V 5A circuit with explanation

This is circuit Variable Regulator power supply,Output voltage 0-30V and Current 5A max. Use IC LM723 is a voltage regulator designed primarily for series regulator applications. By itself, it will supply output currents up to 150 mA I so use Transistor 2N3055 X 2 for Booster current to 5A. IC CA3140 for Control Current and Voltage. P1-50K for...