Community Projects
Projects published below, have NOT been tested at Electronics For You Labs. But, that does not mean that they don’t work.
We invite YOU to try and test them, and share your feedback and suggestions for improvements.
We will be happy to recognise the good ones via Certificate of Recognition and a Surprise Gift, on a weekly basis….
Dual Universal Hardware Driver for Embedded Systems
Introduction
The embedded systems should drive different peripheral devices requiring significant electrical power.
A typical case is the DC motors, operating from 6V, 12V and 24V.
These...
Low Cost High Impedance Buffers for Oscilloscopes and Voltmeters
Most of the low cost digital oscilloscopes and voltmeters have input resistance around 1 MOhm and input capacitance around 100pF. But in many case...
Bipolar Power Supply with LM317T and with LM337T Controllable with Stereo Potentiometer
LM317T and LM337T are well known and low cost adjustable voltage regulators with current limiting up to around 1.5A and power dissipation up to...
Simple Audio Power Amplifier With NE5534/А And Darlington Transistors With Up To 30W Of Output Power
These days there a lot of audio power amplifiers in integrated circuits (ICs). But it is still interesting to produce audio power amplifiers with...
Multifunction Rechargeable Clock
Building clocks are one of the interesting and easiest projects that can be seen among hobbyists and makers. Presented here is a multifunction rechargeable...
Low Cost Dual Channel Active AC Analog Probe
Introduction
When we are experimenting with AM receivers for LW, MW and SW we are in need of high impedance analog probe with low input...
LM1875 Based Simple Amplifier
LM1875 is a low cost and very popular and useful integrated circuit (IC). It is designed to be stable with gain higher than ten....
Transistorized Microphone Preamplifier With Band Pass Filter
Introduction
The signal from most of the microphones should be amplified before to be send to the interconnection cables.
In order to reduce the noise of...