Wireless Power Transmitter
#wireless power
#transmitter
#inductive coupling
#energy transfer
#resonance
#power electronics
#RF
#coil
#charging
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Small Radio Transmitters
Information about building a small radio transmitter, which has a PCB measuring 1.75" x 2.5" (45mm x 68mm) and has a range of approximately 30 yards. The documentation states that the frequency range is 100-108 MHz, but it has been...
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...
remote control circuit
The remote control circuit comprises two main components: a transmitter and a receiver. The transmitter circuit is controlled by an NE555 integrated circuit (IC), while the receiver operates based on the frequency of the signal emitted by the transmitter. It...
RF Remote Control Switch Rx-Tx circuits
This circuit includes a 2048 radio remote control transmitter and a corresponding wireless receiver that features high reception sensitivity and low power consumption. The combination of these two components provides a highly reliable remote control system, suitable for various applications...
Simple RF Power Meter
Many beginners trying out their skill with QRP TX for the first time have to overcome many problems before they are able to come on the air. One usual complaint is that everything is working fine, but the signal is...
Wide Dynamic Range Field Strength Meter
A field strength meter is a useful tool for locating a transmitter. However, a sensitive field strength meter has limitations: it responds to nearly any RF signal entering its input. This characteristic reduces the effective sensitivity of the field strength...
Test Transmitter
The Test Transmitter (A3020) is a combination of three circuits designed to test the Subcutaneous Transmitter (A3019) and to analyze surface acoustic wave (SAW) voltage-controlled oscillators (VCOs). The A3020 incorporates the complete A3019 circuit in its central section, which closely...
AM FM Simultaneous Transmitter Using Digital ICs
An FM and AM transmitter integrated into a compact device utilizing the CD4001 integrated circuit. It broadcasts at 20 MHz for AM and 100 MHz for FM.
The described transmitter combines both Frequency Modulation (FM) and Amplitude Modulation (AM) capabilities into...
Valve Transmitter circuit 70W
This transmitter, equipped with a quality antenna and utilized under optimal conditions, can achieve a range exceeding 45 km. The configuration benefits from the output lamp's elevation, enhancing the fidelity of the transmitted signal. The 6V6 lamp is employed in...