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Posts tagged 2N4403

Preamps Microphone Mixer circuit

Preamps Microphone Mixer circuit Choosing a good power amplifier is very easy but to choose the perfect microphone preamps is not easy, because the adjustment of sound pressure level (SPL) with volt level (dBu). Matching microphones and preamplifiers requires proper research and measurement, so to do this does not depend on your budget – but […]

Is there online PCB Design course available?

Prabir Debnath asked: I am embedded board designer. I would like to know PCB Designing in detail, preferably through online pcb design course I am sorry for categorizing in the Special Education — my mistake

Wireless Systems Using Aurel RX FM

Portable PA System with Wireless Microphone using wireless systems circuit diagram Component 1: R1 100 Ω        C1 100 µF 25V     D1 1N4007 R2 5.6 kΩ       C2 10 µF 16V        T1 BC547 R3 470 kΩ     C3 220 nF              U1 Aurel TX FM […]

what is power supply ?

what is power supply ? what is power supply ? This article is about the common off-line switching power supplies used Preamplifiers what is power supply ? +15 and -15 , GND what is power supply ? One unit of Preamplifiers has begun working, while the second one will be operational The power supply +15 […]

A simple low cost LED pulser

A simple low cost LED pulser using a 555 timer device A simple low cost LED pulser using a 555 timer device

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