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Tuesday, December 27, 2016
Tuesday, December 20, 2016
Sunday, April 13, 2014
Wireless FM Transmitter Circuit
With MAX2606 we can make a small mono fm transmitter. It is build with MAX2606 and covers at least 20m with 1.5 m long copper wire antenna. You can use this transmitter as an oscillator but change the 1000pF capacitor from the antenna with 15pF.
MAX2606 transmitter output power is -10dBm, that means something around
100µW (micro-watts) = 0.0001W. Of course this is very low, that’s why we
recommend you to use an auxiliary power amplifier if you...
Long Range FM Transmitter
This is very stable, harmonic free, long range fm transmitter circuit
which can be used for fm frequencies between 88 and 108 MHz. This can
cover 5km range (long distance). It has a very stable oscillator because
you use LM7809 stabilizer which is a 9V stabilized power supply for T1
transistor and for frequency adjustment that can be achieved by using
the 10K linear potentiometer. The output power of this long range rf
transmitter is around...
Good FM Transmitter Circuit
This house FM transmitter for your stereo or any other amplifier
provides a good signal strength up to a distance of 500 meters with a
power output of about 200 mW. It works off a 9V battery.
The audio-frequency modulation stage is built around transistor BF494
(T1), which is wired as a VHF oscillator and modulates the audio signal
present at the base. Using preset VR1, you can adjust the audio signal
level.
Audio FM transmitter circuit...
Monday, March 10, 2014
8 function christmas lamp
Description.This 8 function serial Christmas lamp controller is based on the IC UTC 8156 from Unisonic. Specially designed for the same purpose, the UTC 8156 can control the four lamps in 8 modes namely waves, sequential, slo-gol, chasing/flash, slow fade, twinkle/flash, steady ON and auto scan. Control signals for controlling the lamps will be available at pin 12 to pin 15 of the IC. SCRs are used to drive the lamps according to these control...
Multi-channel audio mixer circuit using LM3900
LM3900 multi-channel audio mixer.
A simple multi-channel audio mixer circuit using LM3900 quad amplifier is given below. The circuit consists of 4 channel quad amplifier (LM3900). Two mic audio inputs and two direct line inputs are available in this circuit. By adding the same circuit parallel with this, you can increase the number of inputs according to the applications. Each input is connected to the inverting terminal of LM3900.The built in...
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