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M15m Tracking Transmitter – Circuit Schematic
M15m Tracking Transmitter
The M15m Tracking Transmitter is a modified version of the M15 Animal Tracking Transmitter. It has been designed to be used on 147. 460 MHz using an inexpensive...
FM Tracking Transmitter – Circuit Schematic
FM Tracking Transmitter
The following plans describe how to build a very small tracking transmitter that can be tracked using an FM broadcast band radio receiver. The transmitter is po...
Build a FM radio transmitter – Circuit Schematic
Build a FM radio transmitter
This is a guide to becoming a techno rebel: a guide to becoming a radio pirate and raiding the silent airwaves with your own content. This is a follow up to my ...
A 70cm Wide-band Transceiver Concept – Circuit Schematic
A 70cm Wide-band Transceiver Concept
This article presents a description of a 70cm wideband transceiver for duplex operation. The modules are designed for operation in a 200 kHz wide duplex channel...
Autodyne Circuit – Circuit Schematic
Autodyne Circuit
An Autodyne circuit combines three functions normally found in different stages in an RF Receiver into a single circuit. However the three stages which are the ...
RF Mixer Circuit – Circuit Schematic
RF Mixer Circuit
In the general sense a mixer is basically any circuit that combines two or more circuits or signals into a common output. A more commonly used definition define...
Electronic Dictionary Radar Terms – Circuit Schematic
Electronic Dictionary Radar Terms
The allowable reduction in system performance. For a fire control radar, the acceptable degradation is usually expressed as a reduction in range; for example, t...
Monte Carlo Method for Determining the Interrogation Zone in Anticollision Radio Frequency Id Systems – Circuit Schematic
Monte Carlo Method for Determining the Interrogation Zone in Anticollision Radio Frequency Id Systems
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Millimeter-Wave CMOS Impulse Radio – Circuit Schematic
Millimeter-Wave CMOS Impulse Radio
An edge combiner comprising MOSFETs C and D has to generate a 16ps pulse. Centre frequency as a function of NMOS width Wser over inverter width Winv. Figure 12....
CMOS Integrated Switched-Mode Transmitters for Wireless Communication – Circuit Schematic
CMOS Integrated Switched-Mode Transmitters for Wireless Communication
Measured output power and efficiency of a 6 dBm 130nm CMOS class-D inverter chain, using gate bias variation to create a pulse width modulated inverter output v...
Radio Jammer – Circuit Schematic
Radio Jammer
This also Not a Cell phone jammer. Jamming a Cell phone is similar on its principle, but totally a different build, you need a range from 800MHz to 900MHz. You ...
RF Jammer Diagram – Circuit Schematic
RF Jammer Diagram
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FM Listening Bug Kit – Circuit Schematic
FM Listening Bug Kit
As you can see in the schematic below this is a very simple circuit and will be an easy build. On thing the Schematic doesn`t convey very well is wher.....
433 MHz UHF lost model radio beacon – Circuit Schematic
433 MHz UHF lost model radio beacon
Here`s a simple 433.92 MHz short range radio beacon that may be handy for locating downed R/C planes, lost ballons, model rockets - or perhaps hidden.....
fm radio jammer – Circuit Schematic
fm radio jammer
This is VERY illegal. As a consumer, you MUST comply with part 15 of the rules and regulations. Part 15 states that your device must accept any interference rec...
555 Am TransmitterCircuits – Circuit Schematic
555 Am TransmitterCircuits
I have two ICM7555 CMOS 555 timers, and I was wondering if anyone has any good am radio transmitter circuits that incorporate two (or one!) 555 timers.....
88-108Mhz FM Radio Transmitter – Circuit Schematic
88-108Mhz FM Radio Transmitter
The mod I present here is to use a 2n2219 NPN transistor in place of T2 and a 2n3553 NPN transistor in place of T3. Both are VHF transistors. The last transisto...
UHF indicator – Circuit Schematic
UHF indicator
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TDA7000 FM Radio Receiver Circuit – Circuit Schematic
TDA7000 FM Radio Receiver Circuit
The TDA7000 is a monolithic integrated circuit for mono FM portable radios or receivers where a minimum on peripheral components is important (small dimensions ...
Superheterodyne Radio Uses One Tube – Circuit Schematic
Superheterodyne Radio Uses One Tube
Nothing in this project is real original, but I did do a couple of modifications from the circuits I saw. The fellow that started this, as far as I can tell is ...