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Arduino Nano Sensor Interface

TK Hareendran guides you to discover the basics of low power modes using an Arduino Nano. These modes are particularly useful for edge node sensor applications. This is the first in a series of blog posts on the topic.
preamplifier scanner circuit schematic

Audio Preamplifier Scanner Circuit

Received by Email - 06/05/2008

This circuit scan all the preamplifier entries to identify where is a audio signal and that entry remains [...]
short wave receiver preselector circuit schematic

SW Receiver Preselector Circuit

Received by Email - 05/29/2008

This is a Preselector for SW receivers (diy hf preselector) circuit. The entry low capacitance of MOSFET modern, [...]

Audio Amplifiers from Class A, B, D to T

P. Marian - 05/22/2008

The final amplifier is the power source of every audio installation. Its job is to convert a small [...]
vox-circuit-schematic

VOX Circuit

Received by Email - 05/21/2008

VOX is a switch ordered by voice, often used at microphones instead of the classic switch button. The [...]

NS741 Stereo FM Transmitter Circuit

P. Marian - 05/19/2008

NS741 is an integrated circuit, a small power fm transmitter were left and right audio signals can be modulated in FM stereo with multiplexing. (more…) [...]
stun gun circuit schematic

DIY Stun Gun Circuit

P. Marian - 05/11/2008

This is a diy simple stun gun circuit showned only for learning! In No Way Do I Recommend [...]

BLY94 50W RF Amplifier Circuit

P. Marian -

This fm rf power amplifier circuit is built with BLY94 transistor which delivers up to 50W at 175MHz [...]
stereo encoder circuit schematic

Stereo Encoder Circuit

P. Marian - 05/10/2008

This simple stereo encoder circuit schematic is build with 2 IC MMC4066E and MMC4047 and one transistor BC547B. [...]
tv transmitter circuit

Small TV Transmitter Circuit

P. Marian - 05/06/2008

This small video transmitter is very usefull for video surveillance on short distances ( up to 100m ) [...]

TLC272 Datasheet

P. Marian - 05/04/2008

The TLC272 and TLC277 precision dual operational amplifiers combine a wide range of input offset voltage grades with low offset voltage drift, high input impedance, low noise, and speeds approaching those of general-purpose BiFET devices. [...]
class a preamplifier circuit schematic

Class A Preamplifier Circuit

Received by Email -

This class A preamplifier has been designed in a symmetrical structure. In the input differential stages we've used [...]

2N3055 50W Audio Amplifier

P. Marian - 05/03/2008

A very simple audio power amplifier circuit built with 741, 2N3053, 2N4037, 2N3055 and MJ2955 which deliver up [...]
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