KVC758A124 3BHE021951R1024 | ABB| Remote control module

Description

KVC758A124 3BHE021951R1024 | ABB | Remote control module

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KVC758A124  Working principle: The device is divided into four major parts: remote control module, main controller, slave controller, and control circuit. Remote computers and mobile phones communicate with the main controller with the Windows KVC758A124   platform through the Internet network and GPRS network, respectively. The main controller and the slave controller are connected to the Bluetooth module through serial ports, and communicate through Bluetooth transmission. Directly connected to the control circuit from the controller, household appliances are controlled through the control circuit, as shown in the design of the wireless transceiver module circuit for nRF0433.

This is a common emitter KVC758A124  circuit that adjusts the base bias. When an analog signal is input, the collector current of the transistor changes with the intensity of the analog signal, so the output light power of the LED also changes with the analog signal. Adopting an improved form of this circuit, the circuit adopts a 5V DC operating point and is designed with R1=30 Ω and R2=2K Ω. A capacitor Cf=10uF is connected between the transmitting end and the signal source. As the gain of LM386 can reach 200, in order to reduce the amplitude of the transmitting end signal (otherwise the signal amplitude is too large and difficult to adjust to no distortion at the receiving end), a resistor Rb=100 Ω is connected between the capacitor Cf and the ground. Due to the KVC758A124  reaching around 20mA, it can be calculated from R1 and R2 biases that the resistance connected to the emitter is about tens of ohms. The design is Re1=20 Ω, Re2=52 Ω, and a DC isolation capacitor Cef of 100uF is connected in parallel on Re2.

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