Radio remote control dimmer light circuit

The radio remote control dimming lamp uses a micro radio transmitter, receiving module and dimming special integrated circuit,
so the circuit is simple, easy to make, and has good working reliability. Moreover, the entire control switch only has two lead wires to the outside,
so it can be directly used to replace the ordinary lighting switch, and the ordinary lighting lamp can be changed into a remote-controlled fluorescent lamp without changing
the original indoor wiring.
    The rightmost part of the picture is the remote control transmitter, which consists of the transmitter module A3, the lu pool (and the key switch SH).
Al is the light-specific integrated circuit NB72S2. When the button SH of the transmitter is pressed. A3 (RC M-1A ) The
hidden transmitting antenna will radiate UHF electromagnetic waves with a frequency of about 25(J-300MHz) into the air. Within the effective
distance (<15m), it will be received by the built-in antenna of A2 (RCM-1R) . After decompression, amplification
, detection, delay and level conversion by the internal circuit of the module, a high-level pulse is output from pin ② and directly sent to the
high-voltage signal control input pin ⑥ of the optical integrated circuit Al. Use To control the trigger pulse signal of pin ⑧ of the input terminal, and then control
the opening and closing and conduction angle of the bidirectional thyristor VTH. When the command signal coming in from the transmitter is less than 332mS
, the switch at A1 is in the operating state, that is, the lU light When F is off, just press the emission switch SH briefly (
the time of pressing the key is less than 332n, s). The light E will be lit; press SH again briefly, the light will go out. When the button is pressed, the time is
332rns. Al is in Adjust Jt to the operating state, that is, the light turns bright and dim, and then gradually darkens and brightens
in a cycle. Until the button SH is released, the iLl light brightness is fixed at the moment before it is released. The light brightness cycle cycle is
7 64s .
    Al divides the brightness of the electric stroke E into 83 different brightness levels from the brightest to the darkest. At a
specific time of each cycle of the AC power, a trigger pulse is output from the ⑧ pin, and R is used to control the conduction angle of the VTiI (4l9 ~
lj 9 4), it can basically realize the adjustment of light brightness. Al also has a memory function, which can
store the height level before turning off the light in the circuit board and keep it until the next time the light is turned on. Therefore, when the light is turned on again , the electric worm can maintain its original
brightness.