Practical electric curtain remote control device

I once bought a remote-controlled electric curtain. The original control part used infrared remote control, which had a limited range and was inconvenient to use. For this reason, I modified it and replaced the original control part with a wireless remote control. The effect was very good. The following introduces the circuit principle of the electric curtain for readers' reference.
Working Principle

The transmitting/receiving part of the device uses the T966/T988 multi-channel wireless transceiver module. The transmitting part uses the finished T966 two-button transmitter, and the working principle of the receiving part is shown in Figure 1.

When the power is turned on, IC3 is reset, Q (pin ①) and Q (pin 11) output low level, T1 and T2 are turned off, J1 and J2 are not attracted, motor M does not work, and the curtain stops moving. Press the remote control transmitter key C, then IC1's C terminal outputs high level, VD1 is turned off, and the high level output from Io terminal is shaped by IC2A and IC2B and sent to IC3A's CK (pin ③) terminal, so that Q (pin ①) flips to output high level, T1 is turned on, J1 is attracted, the motor rotates forward, and the curtain closes. If the transmitter key C is pressed again, Q (pin ①) flips to output low level again, J1 is released, and the curtain stops moving. If the transmitter key D is pressed while the motor rotates forward and the curtain closes, VD2 is also turned off, and the high level output from Io terminal is shaped by IC2C and IC2D and sent to IC3B's CK (pin 11) terminal, and through VD3, IC3A's R terminal presents a high level, IC3A is forced to reset, and J1 is released. At the same time, Q (pin 13) flips and outputs a high level, T2 is turned on, J2 is closed, the motor reverses, and the curtain opens. Similarly, press the D key again, Q (pin 11) flips and outputs a low level again, and the curtain stops moving. In this way, the curtain can be opened, closed, and stopped at will by using two keys, which is very convenient.

Component selection and production

The components list is shown in the table below.

Note: This article has been partially modified based on the original text