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Transmitter circuit diagram:  Transmitter parts: R1 68K 1/4W Resistor C1 4n7 630V Ceramic or Polyester Capacitor C2 60-80pF 63V Ceramic Trimmer C3 100µF 25V Electrolytic Capacitor Q1 BC337 45V 800mA NPN Transistor Q2 BD139 80V 1.5A NPN Transistor L1 500 turns on a 10mm. diameter, 10cm. long ferrite rod. Enameled wire diameter: 0.2mm. The tap is made after 200 turns, ground side P1 SPST Pushbutton B1 6-9V Battery (4 to 6 AA 1.5V Cells in series, see Notes)  Receiver circuit diagram: Receiver parts: R1,R3 1M 1/4W Resistors R2,R4 47K 1/4W Resistors R5 330K 1/4W Resistor R6,R7 68K 1/4W Resistors R8 180R 1/4W Resistor R9 100R 1/4W Resistor C1 470pF 63V Ceramic Capacitor (See Notes) C2 10nF 63V Polyester or Ceramic Capacitor C3 100µF 25V Electrolytic Capacitor C4,C5 100nF 63V Polyester or Ceramic Capacitors C6 1µF 63V Polyester, Ceramic or Electrolytic Capacitor D1 5 or 3mm. Red LED Q1,Q2,Q3 BC549C 25V 100mA NPN High-gain Low-noise Transistors Q4 BD328 30V 800mA PNP Transistor L1 70...

This is a Simple Project of Remote Control Receiver Circuit Diagram. An infrared receiver, or IR receiver, is hardware that sends information from an infrared remote control to another device by receiving and decoding signals.This circuit is based on the Sharp GP1U52X IR module and 1NS8048L microprocessor. The GP1U52X is a hybrid IC/infrared detector that provides a strong clean signal for later filtering and demodulation. Remote Control Receiver Circuit Diagram

Suitable for any Infrared emitting device, 3V battery supply. A very simple device allowing a quick check of common Infra-red Remote-Controls can be useful to the electronics amateur, frequently asked to repair or test these ubiquitous devices. A reliable circuit was designed with a handful of components: the LED will flash when any of the Remote-Control push buttons will be pressed. The side of the Remote-Control bearing the IR emitting diode(s) must be directed towards the Photo Transistor (Q1) of the checker circuit: maximum distance should not exceed about 20 - 25cm. . Circuit Diagram:   Infrared Remote Tester Circuit Diagram Parts: R1 = 470K R2 = 47R D1 = LED Any Type Q1 = Photo Transistor Q2 = BC327 B1 = 3V Battery or 2 AA cell Notes: Current drawing of the circuit is less than 1mA when the LED illuminates and 0mA when no signal is picked-up by the Photo Transistor: therefore, SW1 can be omitted. SW1 will be SPST Toggle or Slider Switch Sourced By: Streampowers

This is the simple Remote control tester circuit diagram. When the remote control is not working, first check the battery before, It may be loss.If it is good,so detect transmit infrared light device.However, because the human eye can not see infrared light,so can not know how good or bad.But the photo transistor can use to detect infrared light.  This circuit so use this photo transistor is the light receiver from the remote control.If it is nice to have the bias current of the transistor BC558.It runs a current flows through the LED,so the LED bright.The remote control that works correctly. The variable resistor VR1 is used to adjust the sensitivity of the circuit.  Remote control tester circuit diagram  

This circuit allows a 240V mains appliance to be controlled remotely via low-voltage cabling and a pushbutton switch. The mains appliance (in this case, a light bulb) is switched with a suitably-rated relay . All of the electronics is housed in an ABS box located in proximity to the appliance. The pushbutton switch and plugpack are located remotely and can be wired up with 3-core alarm cable or similar. Cable lengths of 20m or more are feasible with this arrangement. When the switch (S1) is pressed, the input (pin 8) of IC1c is briefly pulled low via the 10mF capacitor, which is initially discharged. Low-Voltage Remote Mains Switch Circuit diagram: Low-Voltage Remote Mains Switch Circuit Diagram The output (pin 10) immediately goes high and this is inverted and fed back to the second input (pin 9) via another gate in the quad NAND package (IC1d). In conjunction with the 1MW resistor and 470nF capacitor, IC1d eliminates the effects of contact "bounce" by ensuring that IC1c’s o...

The normal level-indicator circuits which are available in the market require connections to be made to the output of the player, which may not be easily accessible. The audio level indicator circuit described here removes this restriction as it may be placed close to the player’s speakers and yet the desired effect can be realised.  Remote Audio Level Indicator Circuit diagram : Remote Audio Level Indicator Circuit Diagram As shown in the circuit, signals are picked up by the condenser microphone, which get further amplified by the noninverting amplifier built around one of the four op-amps of LM324. The remaining three, along with four op-amps of the second LM324, are used as seven comparators to work as the level detector, giving seven output levels through seven coloured LEDs.  The sensitivity of the audio level indicator circuit may be improved by varying the 220k potentiometer. If a fine adjustment is desired, a 4.7-kilohm potentiometer may be connected in series resis...

The circuit is very effective to test the remote controls what still works or not, the remote record will be tested using infra red. Examples of the TV remote, AC and others. Please try I am sure 100% will be successful. TV  Remote Tester Circuit The workings of the circuit is very simple, when the infra red sensor receive infrared signals pin 2 sensor will produce a voltage, this voltage will drives the PNP transistor so that the LED lamp and piezo disc (BZ) is active. for the power supply you can use a 9 volt battery and then use IC 7805 or use 1.5 volt batteries x 3 Following the specification of components installed Transistor BC557 TSOP 1738 Sensor Infra Red R1 = 10k ohm ¼ watt Resistor R2 = 1k ohm ¼ watt Resistor R3 = 1k ohm ¼ watt Resistor BZ = piezo disc led

Suitable for any Infrared emitting device, 3V battery supply. A very simple device allowing a quick check of common Infra-red Remote-Controls can be useful to the electronics amateur, frequently asked to repair or test these ubiquitous devices. A reliable circuit was designed with a handful of components: the LED will flash when any of the Remote-Control push buttons will be pressed. The side of the Remote-Control bearing the IR emitting diode(s) must be directed towards the Photo Transistor (Q1) of the checker circuit: maximum distance should not exceed about 20 - 25cm. . Circuit Diagram:   Infrared Remote Tester Circuit Diagram Parts: R1 = 470K R2 = 47R D1 = LED Any Type Q1 = Photo Transistor Q2 = BC327 B1 = 3V Battery or 2 AA cell Notes: Current drawing of the circuit is less than 1mA when the LED illuminates and 0mA when no signal is picked-up by the Photo Transistor: therefore, SW1 can be omitted. SW1 will be SPST Toggle or Slider Switch