Warning: Take care with transmitter circuits. It is illegal in most countries to operate radio transmitters without a license. Although only low power ...
The oscillator, Q1, is a standard overtone circuit. A fifth-overtone crystal, 80.545 MHz, is operated on the seventh overtone, 112.763 MHz. C6 couples ...
This article describes the FM Radio Transmitters With OpAmp CIRCUIT (LM2936Z). The content is very simple, very helpful. Components in this article can...
For you who has failed to build? radio transmitters, this circuit worth a try. This circuit uses74HC14hex Schmidt trigger as the oscillator, and you ca...
This 1 channel infrared transmitter/receiver remote control is the cheapest and simplest you can find. The transmitter transmits a sequence of pulses o...
Here is a simple USB FM transmitter that could be used to play audio files from an MP3 player or computer on a standard VHF FM radio by connecting it t...
The BA5104 is designed as one kind of remote control transmitter integrated circuit that is produced by the Toyo company, and it can be used in various...
80-watt 175 MHz FM transmitter for 12.5-volt operation. Forthe rated output of 80 watts 180 mW of RF drive is required (courtesy MotorolaJ Semiconducto...
Modern pulse-code modulator can be used for experimentation above lowest legal frequency of 2.3 61ih, such as for satellite and moonbounce communicatio...
Feeds single-wire loop surrounding area to be covered. Multivibrator V1-V2 produces carrier frequencies in range from 15 to 30 kc, keyed on and off at ...
For the regulation it needs a voltmeter (with needle better) and charge 50W/5W. Connect charge 50W in the place of aerial, with the voltmeter in the ex...
For maximum range, the receiver must be designed in the same manner as a radio receiver front end, since the received signals will be similar in both f...
This line powered xenon flash circuit drives a small camera type flash tube. It has an optical isolator to allow the flash to be safely triggered from ...
BH1417 USB FM Transmitter Here's BH1417 USB FM Transmitter with built-in PLL circuit. Its low-frequency signal is converted into high-frequency, which ...
Current loop analog data transmission is used in industrial environment because of its robustness (good noise immunity), while providing wiring fault d...
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...
This is long range FM transmitter with transmision power output is up to 15W. This fm transmitter use power transistor BLY88c as the main transmitter a...
Here is miniFM transmittercircuit. The FM transmitter circuit using 2 transistor. Audio sensitivity is very good when used with an ECM type microphone ...
Most of the IR remotes work reliably within a range of 5 metres. The circuit complexity increases if you design the IR transmitter for reliable operati...
TV Transmitter Description: A VHF band TV transmitter using negative sound modulation and PAL video modulation. This is suitable for countries using TV...
The following shows the FM transmitter with two VHF circuits. The circuit is very simple, and very practical. Recommend Duokanjibian The schematic in o...
This transmitter uses a 741 op amp as a high-gain audio amplifier, which is driven by a rnicro-phone. The output of the 741 is coupled to Q1, which ser...
This article describes the Four Stage FM Transmitter (BF494). The principle is very simple, very practical. The circuit components can help you underst...
The difference between the 4-channel and the 8-channel version is only the software inside. The 8-channel transmitter has one button (S1-S8) per channe...
The baby-alert transmitter is built around an LM334 quad op amp(U1), two LMC555CM CMOS oscillator/timers(U2 and U3), and a few support components. The ...
This is a medium range transmitter circuit diagram. This is also improved by changing the values of the resistor. Circuit diagram Download this schemat...
Output power is 0.5 w at 95 Mc, and range is 400 miles. Provides two channels.-L. E. Peterson, R. L. Howard, and J. R. Winckler, Balloon Gas Monitors C...
A very good 1 watt fm transmitter circuit, very easy to build circuit. It has 4 transistors, one is a very stable oscillator, followed by a buffer stag...
Notes: It is illegal to operate a radio transmitter without a license in most countries. This ircuit is deliberately limited in power output but will p...
This transmitter has a built-in distortion effects unit and a touch switch to switch effects off and on. The circuit operates from a 9-V battery. IC1-a...
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