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Radio Shack Special - Transmitters (Patrick Cambre) - (electronic schematic /
circuit added 08/09) |
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Ramsey 25 BA1404 Stereo FM Transmitter - Highly praised transmitter based on
BA1404 IC. (electronic circuit added 6/07) |
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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 measures 34 mm x 29 mm x 10 mm, can be used to
operate all remote control receiver-cum-switch combinations described in this
project....(10/05) |
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Remote RF Xmiter - ….(design added 05/09) |
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RF amplifier 25W - FM 88-108MHz RF amplifier 25W (electronic circuit added
6/07) |
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RF Power Meter - RF Power Meter for QRPers (electronic circuit added
03/04/05) |
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RF telemetry transmitter features minimal parts count - 01/06/05 EDN-Design
Ideas:.....(design idea added 5/05) |
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RF Transmitter - (electronic circuit added 7/03) |
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RF Transmitter for PIR Sensors - (electronic diagram added 6/03) |
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RF Transmitter Light Sensing - (Tony van Roon's electronic schematic / circuit
added 4/02) |
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RF Transmitter uses AMI encoding - 11/24/99 EDN-Design Ideas: Although
alternate-mark-inversion (AMI)encoding is well-suited for direct-conversion FM
transmission, designers often overlook the technique. AMI, a three-phase,
synchronous-encoding technique, uses bipolar pulses to represent logic ones and no
signal to.....(design idea added 6/06) |
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RF/SS Handie Hopper Transmitter Schematic - (electronic circuit added 7/03) |
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RFPIC12F675 Transmitter Module - Microchip Application Note Published 20-Jun-03
(app note added 2/06) |
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Sensitive FM Transmitter - (schematic added 8/03) |
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Shortwave converters for scanners - ….(design added 03/08) |
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Shortwave converters for scanners - ….(design added 03/08) |
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Shortwave Transmitter - (electronic Circuit / Schematic added 10/04) |
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Simple AV Audio/Video Wireless Transmitter - (circuit / schematic design added
6/06) |
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Simple FM Microphone - (electronic circuit added 7/03) |
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Simple RF Power Meter - Here is a simple set up which will enable them to measure
the out put power of their transmitter. All that they require is a good multimeter
which has a sensitivety of 20k ohms/4 Watts which is adequate for low power
transmitters. (electronic circuit added 6/07) |
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Simple RF Transmitter - (electronic circuit added 7/03) |
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Simple speakerphone - (electronic design added 6/07) |
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Simplest RF Transmitter - (Tony van Roon's circuit added 9/04) |
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Single Channel RC Cars TX and RX - Here is the 9 volt GS transmitter which does
not use a crystal. This clever design allows only two transistors to generate both the
carrier and the modulation. Shown below at 27MHz 40MHz and 49MHz: (added 2/05) |
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Small bug using SMT surface mount technology - (schematic / circuit added 05/07) |
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Small circuit forms Programmable 4 to 20 mA Transmitter - 04/17/03 EDN-Design
Ideas: One of the key challenges in the design of 4to 20-mA current transmitters
is the voltage-to-current conversion stage. Conventional transmitters use multiple op
amps and transistors to perform the conversion function. These approaches have been
around for a long time, but they.....(design idea added 1/05) |
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Small FM transmitter SMD - (electronic design added 6/07) |
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Small Radio Transmitter - (electronic circuit added 7/03) |
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Spark gap Transmitter - (electronic circuit added 7/03) |
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Spark-gap transmitter - (circuit added 6/07) |
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Stereo FM Transmitter - AN-543-StereoFMTransmitter-Analog Device Application Notes
(app note added 6/06) |
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Surveillance Transmitter Detector - This circuit can be used to "sweep" an area or
room and will indicate if a surveillance device is operative. The problem in making a
suitable a detector is to get its sensitivity just right, Too much sensitivity and it
will respond to radio broadcasts, too little, and nothing will be heard. |
