Development of single chip microcomputer for learning remote controller

Development of single chip microcomputer for learning remote controller

Description of functional parameters:

Working voltage: DC12V

Quiescent current: None

Receiving frequency: 315MHz

Receiving sensitivity: - 105dB

Technical parameters of Launcher

Emission distance: 20-200m (different voltage, different effect)

Working voltage: 12V

Power supply mode: dry battery

Transmission frequency: 315MHz

1、 Brief description of working principle:

It is sensed by the receiver on the transmitting remote control signal. When it is very close to the transmitting, the field strength is very high and can be measured. According to this principle, we design this model with receiving mode and transmitting mode. The MCU learns and stores the signal, turns to the transmitting mode after completion, and then calls out the response internal code and transmits it through the matching antenna

2、 Operating instructions:

1. Clear the existing code

Press and hold the S1 button above and the S2 key in the upper row at the same time. Make sure that the LED will not go out after flashing for a while. The LED will start flashing after 2S, which indicates that the code has been cleared.

2. Copy other address codes

Take the original remote control in the left hand and our self-study test in the right hand. The two remote controls should be as close as possible. Press one of the two remote control lock keys (S3, S4, S5 and S6) at the same time, and the LED light will flash continuously after 3S, indicating that the original lock key code has been learned by our self-study test.

The other three keys operate the same way.

This learning method can be changed according to your requirements

3. Recovery error code

When you accidentally clear the self copied code, you can press start (Bell) and mute (lightning) at the same time. After 3 s, the LED will light up and then flash quickly, indicating that the self copied code has been restored.

Before using our self copy to copy, please be sure to clear the existing self copy code first.

The following is a method to test whether the existing self copying code has been successfully cleared:

When you end the code clearing action, you can press any key of self copying. If the LED flashes once, it is off instead of on, it means that the self copying code has been completely cleared. If the LED is on instead of flashing once.

Scope of use: it can copy almost all frequency fixed codes and learning codes in the market (refer to the following details for specific operation methods), that is, one of the two remote controllers must be able to transmit normally and the other remote controller must be empty. The remote control requires six keys or more to copy.

The identification methods of working frequency and coding chip model are as follows. If it meets the requirements, it can be copied: take the most common fixed code or learning code as an example, open the shell and see that the value on the sound meter element (like a small metal button or element similar to crystal oscillator) on the circuit board has 315 words. For example, r315a indicates the working frequency 315m, and this working frequency 315m, At present, the vast majority of frequencies in the market are 315m and 433M, accounting for 98% of the market, and a small number of frequencies such as 330m, 390m and 430m.