Radio Remote Control using DTMF
Radio Remote Control using DTMF Here is a circuit of a remote control unit which makes use of the radio frequency signals to control various electrical appliances. This remote control unit has 4...
View ArticleSimple Coil Less FM Transmitter
Simple Coil Less FM Transmitter For months IÂ’ve been looking for a simple FM BUG project, the ones online require inductors which you either have to acquire or build, if you donÂ’t have a LCR meter it...
View ArticleSimple FM Transmitter
Simple FM Transmitter Simple FM transmitter with a single transistor. Mini FM transmitters take place as one of the standard circuit types in an amateur electronics fan's beginning steps. When done...
View ArticleSolar Powered Long Range FM Transmitter
Solar Powered Long Range FM Transmitter There are many miniature FM transmitter bug circuits online, this one is unique in that it runs completely on solar power. No battery is required. As long as the...
View ArticleRamsey 25 BA1404 Stereo FM Transmitter
Ramsey 25 BA1404 Stereo FM Transmitter Stereo FM transmitter based on BA1404 and 145170 frequency synthesizer IC.
View ArticlePLL FM Transmitter
PLL FM Transmitter This new FM transmitter is very simple and doesn't need any RF tuning.First of all ,we have used an integrated VCO: The POS150 from Mini-circuits.This excellent RF circuit covers all...
View ArticleRemote control using VHF modules
Remote control using VHF modules A few designs for remote control switches, using VG40T and VG40R remote control pair, are shown here.The miniature transmitter module shown in Fig. 1, which just...
View ArticleSpy FM Transmitter Bug
Spy FM Transmitter Bug Here's a tiny one transistor spy FM transmitter bug that operates from a single 1.5V AA battery. Main advantage of this circuit is that power supply is a 1.5 Volts cell (any...
View ArticleMC145170 PLL FM Transmitter
MC145170 PLL FM Transmitter In order to simplify the transmitter design, we've used the new pll circuit from Motorola :the MC145170.This PLL includes the prescaler and a serial standard bus called SPI....
View ArticleStereo FM Transmitter Using BA1404
Stereo FM Transmitter Using BA1404 A high quality stereo FM transmitter circuit is shown here. The circuit is based on the IC BA1404 from ROHM Semiconductors. BA1404 is a monolithic FM stereo modulator...
View ArticleMicro Spy PLL FM Transmitter
Micro Spy PLL FM Transmitter This micro spy PLL FM Transmitter transmits on the 160MHz frequency (if we use a 40MHz quartz) and therefore can be listened through a receiver tuned on this frequency....
View ArticleRF Buffer Stage
RF Buffer Stage This bufferstage is intended to be used after a BF900 or BF199 (even a BF245) oscillator. It delivers several milliwatts and is perfect to drive a 2N2219 or 2N4427. Be sure the coils...
View ArticleStereo FM Transmitter with BA1404
Stereo FM Transmitter with BA1404 Circuit of stereo FM transmitter of of high quality using integrated circuit ba1404 for mp3, mp4, ipod, computer, radio of the car. Transmit of your equipment of...
View ArticleLowPass Filter
LowPass Filter The schematic you find here comes from another site on the internet, but because it's on so many sites, we don't know who actually designed it. However it's a nice one.Capacitors:C1,C4...
View ArticleMicro Transmitter Bug
Micro Transmitter Bug Presented FM transmitter bug is built using BF414 / BF324 / BF606 transistor. The 30cm antenna has a range of about 30m in the building, more in the open field. Power supply 2x...
View ArticleSuper Spy Transmitter Bug
Super Spy Transmitter Bug A very small home made FM transmitter Bug using a single transistor and with a transmission range of 200 meters. This FM transmitter Bug is very easy to build. The size of the...
View ArticleFM Transmitter with Varactor Diode Tuning
FM Transmitter with Varactor Diode Tuning Presented here is a low-power FM transmitter with varactor diode tuning using surface-mount devices (SMD) that will be received with a standard FM radio....
View ArticleMini FM Broadcast Transmitter
Mini FM Broadcast Transmitter Build your own simple mini FM transmitter. This fun project will show you how to build a mini broadcasting transmitter that can transmit an audio signal up to a quarter...
View ArticleHigh Power FM Wireless Microphone
High Power FM Wireless Microphone This FM Wireless Microphone has been a very popular project with beginners and experienced constructors alike. It has been used inside guitars and as the basis of a...
View ArticleMini FM Radio Transmitter
Mini FM Radio Transmitter This small FM transmitter with a range of about 50 meters designed for hoby. With lots of mini-transmitters then you have a comprehensive, action-packed radio program. Due to...
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