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Single Transistor LED Flasher Circuit

Can you imagine of making a formidable little LED flasher or blinker using just a single transistor and a couple of other passive parts. Contents How it WorksParts List for the proposed single transistor LED flasher circuitCircuit DiagramConnecting an External Transistor for Higher LoadsVideo Clip:PCB Design How it Works That looks too good to be … Read moreSingle Transistor LED Flasher Circuit

Automatic Voltage Stabilizer Circuit for TV sets and Refrigerator

stabilizer relay transformer wiring diagram

Here we will study the design of a simple automatic mains AC voltage stabilizer which can be applied for safeguarding appliances like TV and refrigerators from fluctuating voltages. A voltage stabilizer is a device which is used to sense inappropriate voltage levels and correct them to produce a reasonably stable output at the output where the load … Read moreAutomatic Voltage Stabilizer Circuit for TV sets and Refrigerator

How to Make a Dual Tone Siren Circuit

This two tone siren circuit explained here gives out a continuously varying high amplitude sound. Since the supply voltage is not critical, it can be used in cars, motor cycles or at home. It can replace the ordinary call bell. Circuit Operation The circuit consists of two separate free running multivibrator and an oscillator.A free running or … Read moreHow to Make a Dual Tone Siren Circuit

Connecting Two or More Transistors in Parallel

In this post we will learn how to safely connect multiple transistors in parallel, these can be BJTs or mosfets, we will discuss both. Contents Why Parallel Transistor become NecessaryWhat is “Thermal Runaway” in BJTsHow it’s connected? See the figure below.How to Calculate the Emitter Current Limiting Resistor in Parallel BJTsHow to Avoid Emitter Resistors … Read moreConnecting Two or More Transistors in Parallel

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