4 CHANNEL RELAY BOARD

Quad Channel Relay Board is a simple and convenient way to interface 4 relays for switching application in your project. FEATURES Input supply 12 VDC @ 170 mA Output four SPDT relay Relay specification 5 A @ 230 VAC Trigger level 2 ~ 5 VDC Berg pins for connecting power and trigger voltage LED on…

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4 CHANNEL RF REMOTE CONTROLLER

4 Channel RF remote built using PT2262 and PT2272-M4 IC from Princeton technology. PT2262 used as Encoder (Transmitter) and PT2272-M4 Decoder (Receiver) ICs are heart of the project. The receiver provides 4 channel Momentary outputs. All outputs are TTL level can be interface with other circuits or relay board. Transmitter works with 5V to 12V…

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PWM SOLENOID AND VALVE DRIVER USING DRV103

This tiny module is a PWM Solenoids and Valves driver using Texas instrument’s DRV103 low-side DMOS power switch employing a pulse-width modulated (PWM) output. Its rugged design is optimized for driving electromechanical devices such as valves, solenoids, relays, actuators, motors and positioners. This board is also ideal for driving thermal devices such as heaters, coolers, lamps…

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MIC PRE-AMPLIFIER

This project is a microphone pre-amplifier based on LM358. DESCRIPTION This is easy to construct microphone pre-amplifier project using compact electret condenser microphone. The pre-amplifier is important building block of many audio communication systems. Circuit has been built around Op-Amp LM358. Power supply : 5 to 12 VDC @ 10 mA Output: Gain Approx. 100 On-Board…

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MINI AUDIO AMPLIFIER

This project is a mini Audio Amplifier based on LM386 IC. DESCRIPTION The Mini Audio Amplifier project is a good choice for battery operated gadgets.  It is based on Texas instruments LM386 IC, provides high quality Audio. SPECIFICATIONS Wide power supply input 6 to 12 VDC 500 mW output @ 8 Ohms load Takes standard audio signal...
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14W STEREO AUDIO AMPLIFIER

This project is a 14W Stereo Audio Amplifier based on LM4730 IC. DESCRIPTION 14W Stereo audio power amplifier build around LM4730 IC. The LM4730 is stereo audio amplifier capable of delivering typical 14W per channel of continues average output power a 4 Ohms or 8 Ohms load with less than 10% THD+N from  20Hz to 20Khz frequency. Each amplifier…

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MINI STEREO AUDIO AMPLIFIER

This project is a Mini Stereo Audio Amplifier based on TDA2822 IC. DESCRIPTION The dual low power amplifier built around TDA2822 8pin DIP. IC, it is mainly designed to use in portable players, radios and other building block project. A 3V supply can be used to drive headphones providing 20mW in 32 Ohms per channel, and a…

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6.5W STEREO AUDIO AMPLIFIER

This project is a 6.5W Stereo Audio Amplifier based on TDA2004 IC. DESCRIPTION The 6.5W Stereo Audio Amplifier project built around TDA2004 IC. The TDA2004 is a class B dual audio power amplifier, specifically designed for car radio applications etc. SPECIFICATIONS Power supply input 15 VDC Output power: 2 X 6.5 W, 4 Ohm / 2 X…

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10W STEREO AUDIO AMPLIFIER

This project is a 10W Stereo Audio Amplifier based on TDA1521 IC. DESCRIPTION The project built around Philips TDA1521 IC, The project provides high quality audio 2X10W Audio output. The device is specially designed for mains fed applications, (e.g. Stereo TV Sound and Stereo Radio). The circuit designed for asymmetrical power supply systems. SPECIFICATIONS It has few external components…

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TINY MIC PREAMPLIFIER

The Tiny Mic Preamplifier based is based on a single transistor amplifier design.  It amplifies the output of the electret condenser microphone.  Good choice for Karaoke. SPECIFICATIONS Power supply: 5 ~ 9 VDC @ 2 mA Provides standard audio signal PCB dimensions 26 mm x 56 mm SCHEMATIC PARTS LIST PCB DOWNLOADS mic_preamplifier.pdf

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