TRF1400 RF TELEMETRY RECEIVERS VHF/UHF RZ ASK REMOTE CONTROL RECEIVER
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UHF Doppler Motion Detector
The UHF motion detector operates on the Doppler radar principle. An oscillating signal is generated by the oscillator (Q1), and a portion of this energy is reflected back.
The UHF motion detector employs the Doppler radar principle to detect motion through...
Homemade wireless remote control circuit diagram
The homemade wireless remote control circuit diagram illustrates a motor remote control transmitter circuit. The circuit utilizes a 555 timer along with resistors R1, R2, RP1, diodes VD1, VD2, and capacitor C1 to create a variable duty cycle astable oscillator....
Wireless am microphone
The transistor Q1 and its associated components form a tunable RF oscillator. The RF signal is directed to transistor Q2, which functions as the modulator. Operational amplifier IC1 amplifies the audio signal and transmits it through resistor R4 to the...
Remote control robot circuit
The remote control robot circuit is illustrated in the accompanying figure. Figure 2-36(a) presents the circuit diagram, while figure 2-36(b) depicts the operating timing diagram. The robot's rotation process involves an ultrasonic launching circuit, which consists of a 40 kHz...
control electric appliances
This circuit can power on or off various electric and electronic devices such as ADSL modems, personal computers, water boilers, water pumps, garage doors, lights, and more. Additionally, it allows for monitoring the status of eight switches, which can be...
Receiver for 50 khz optical transmitter
To achieve maximum range, the receiver should be constructed similarly to a radio receiver front end, as the signals received will exhibit comparable frequency components and amplitudes of the photodiode current. The primary limitation on the receiver's performance is the...
T5753 T5753 UHF ASK/FSK Transmitter
A typical low-cost FSK modulator, TA0038, is implemented by injecting the modulation voltage into the phase-locked loop (PLL) of the carrier synthesizer. This can be achieved in two ways: by summing the modulation voltage with the loop error voltage and...
low noise vhf uhf oscillators
Unlike conventional small-signal methods, employing large-signal, time-domain design techniques facilitates the creation of low-noise grounded-base oscillators suitable for VHF/UHF applications.
The development of low-noise grounded-base oscillators for VHF/UHF applications presents unique challenges and opportunities. By utilizing large-signal, time-domain design techniques, engineers...
MAX2606 VHF FM Transmitter
To test VHF receivers independently from local radio stations, a frequency-modulated oscillator is required, covering the range of 89.5 to 108 MHz. Building such an oscillator with discrete components is challenging. The MAX260x series from Maxim offers five integrated oscillator...