Remote control color changing chandelier (TDC1808/TDC1809)

Relevant key device information applied in this article: MK5087 TDC1808 TDC1809 YN9102 This circuit adopts DTMF encoding and decoding method and can control four groups of lights. In the transmitter circuit, the row line end and column line end of the DTMF encoder are externally connected to the 4×4 standard Keyboard can generate 16 kinds of command codes. The mute signal output terminal MUTE outputs a low level every time a key is pressed, causing the external light-emitting diode to flash as a transmission indication. The encoded signal is output from the TONE end of the MK5087, and is sent to the transmitting component TDC1808 through the resistor R2 for outward transmission; in the receiving circuit, the receiving component TDC1809 receives the demodulated output signal and sends it to the DTMF decoder YN9102 for decoding, which is driven by D1~ The D4 terminal outputs the binary code corresponding to the emission command code in parallel, and then the thyristor controls the four colors of lanterns. The output signals from D1 to D4 are latched signals, and their outputs can only be updated and changed when the key is pressed again to send instructions.