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HOW TO WORK PLC ?

A PLC works by continually scanning a program. We can think of this scan cycle as consisting of 3 important steps. There are typically more than 3 but we can focus on the important parts and not worry about the others. Typically the others are checking the system and updating the current internal counter and […]

On off Switch Control

On off Switch Control circuit using CD4027 On off Switch Control circuit using CD4027

Headphone amplifier ic

Headphone amplifier ic circuit using TL072, BD139, BD140

The 3.5MHz amateur band circuit

The 3.5MHz amateur band using LM386, MPF102, BC548 Super SO SSB Receiver. An ultra Simple receiver for the 3.5MHz amateur band using LM386, MPF102, BC548

Power Supply

Dual Power Supply circuit using Transformers This is dual power supply using voltage regulator BC547B and Dioda. It’s the best and simplest choice for most non-critical applications. The 3 terminals are input, ground and output. The Dioda can provide up to 1A load current and it have onchip circuitry to prevent damage in the event […]

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