Voyager
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LM909 radio telecontrol receiving decoding circuit diagram
The performance indices of the telecontrol receiving decoding circuit are as follows: radio frequency (f) = 27 MHz, audio frequency (f) = 5.5 kHz, 100% modulation in square-wave form; radio frequency deviation is ±600 Hz, and the frequency shift keying...
Radio frequency Of Remote Control
This is a remote control circuit that uses radio frequency electrical signals to control a variety of applications. Component: Transistor.
The remote control circuit operates by transmitting radio frequency (RF) signals to communicate with various devices. At its core, the circuit...
The alarm circuit diagram for safety box and other metal objects
When an individual touches the safety box or other protected metal objects, the sensor circuit generates a pulse to the alarm circuit. The positive edge of this pulse activates the semiconductor and thyristor flash GE, subsequently triggering the camera to...
Metal detector using radio frequency
This metal detector schematic circuit is based on a transistor radio as a detector. This metal detector is entirely different from other metal detectors because this circuit does not have a speaker. With the radio tuned to a weak station,...
Pots water alarm circuit
The flowers in pots require watering, as relying solely on the observation of moist soil surfaces can be unreliable. To address this issue, a flower watering indicator has been developed. This circuit includes a field effect transistor (VT1), a second...
Remote-Controlled Telephone/Fax Machine Switch
This system uses a transmitter operating at approximately 100 kHz to control a remote receiver. A line splitter can connect the transmitter to the active telephone line. The transmitter is a CMOS oscillator equipped with output buffer stages to drive...
remote control for electrical
A circuit for a remote control unit utilizes radio frequency signals to operate various electrical appliances. This remote control unit features four channels, which can be expanded to twelve. Unlike typical remote control circuits that rely on infrared light for...
Wire Break Sensor Alarm Circuit Schematic
The circuit of a loop sensor-based simple security alarm is described here. The sensor loop consists of a short length of thin enamelled copper wire.
The loop sensor security alarm operates on the principle of detecting interruptions in the circuit formed...
Field disturbance sensor-alarm
The change in ambient light triggers the alarm by changing the resistance of LDR1 and LDR2.
The circuit utilizes two light-dependent resistors (LDR1 and LDR2) to detect variations in ambient light levels. LDRs are passive components that exhibit a change in...