Long press reduces TX range? Check energy storage leakage or signal damping.
Tonny12138 2024-07-11 22:27:12 51 Views0 Replies 2024-07-11 22:27:12 If you press the button and release it quickly when you use it, you don’t need to consider this issue. To ensure that the stored energy will not accumulate and cause the chip to burn out, a bleeder resistor is added to the system. In the "press, store energy, bounce, transmit" mode, the stored energy will begin to bleed slowly after the button is pressed. If it takes a long time, this part of the stored energy will be slowly exhausted by the bleeder resistor. If you have to press it down for a period of time before transmitting the signal during use, you can remove the bleeder resistor at the energy storage terminal. However, it must be noted that in this state, if a DC power supply is used to power the module (DC power supply is required for pairing learning), the energy storage capacitor will be in a state of full energy after the DC power supply is disconnected. Then a bleeder resistor must be connected to discharge the energy storage capacitor to below 1.5V. If the power generation switch is not discharged at this time, the chip will be burned directly when you press down the button. And when the bleeder resistor is removed, it is strictly forbidden to press the power button quickly in a continuous manner.
The discharge resistors are R4 and R2. R4 is used to dissipate the energy generated when the button is pressed, while R2 is used to dissipate the energy generated when the button is released. Tonny12138
Tonny12138 
