Demodulator circuits assembly
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#signal processing
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RF Inductance Meter
This RF inductance meter measures RF chokes in the 500 nH to 50 µH range. A simple solution was required to measure hand-wound RF inductors in a secondary lab setting. The user intended to utilize this device occasionally and did...
5474 tips
The Aristo ART-5474 Accessory Panel is a complete receiver designed to control accessories using buttons A through E on the Train Engineer transmitter. The ART-5474 is capable of controlling two turnouts, one constant load such as lights, and can trigger...
Electronics Projects Circuits
Over 1400 top electronics projects and electronic circuits with photos, datasheets, and easy-to-read schematics, along with explanations of how they work and how to build them.
The collection comprises a vast array of electronics projects suitable for enthusiasts and professionals alike....
Desheng 89701 type radio small shortwave Wang schematic
The circuit diagram for the Desheng 89701 type radio, a compact shortwave receiver, is provided below.
The Desheng 89701 is designed for shortwave reception, making it suitable for capturing a variety of radio frequencies across the shortwave band. The circuit typically...
Energy-sucking Radio Antennas
Here's something that has always bugged me: light waves are about 5000 Angstroms in wavelength, while atoms are more like 1 Angstrom across. Atoms are thousands of times smaller than light waves, yet atoms obviously interact very strongly with light....
Rf-actuated-relay
Automatic antenna switching or RF power indication can be achieved with this circuit. Relay will key with less than 150 mW drive on 2 m.
The circuit designed for automatic antenna switching or RF power indication utilizes a relay that is...
Onkyo TX2500 mk II
An Onkyo TX2500 mk II receiver is being repaired for a friend, but it is experiencing issues with both AM and FM tuning, resulting in low reception quality.
The Onkyo TX2500 mk II is a vintage audio receiver known for its...
RF 433MHz - 3 channels remote control
The schematic is very simple and includes, in addition to Nutchip, with its three driving transistor and LED, the radio receiver. The data come from the OUT pin of the receiver and enter the pin REMOTE remote control. The RESET...
A Simple 80M Direct Conversion Receiver
A few weeks ago, Jason NT7S mentioned the ZL2BMI DSB transceiver as a rig that might be of interest for building. He was correct; it had been seen in SPRAT, but for some reason, it had not been seriously considered...