AndyFe
New Member
I’m using an ESP8266-DEV to measure battery voltage and control some LED lights.
The first 2 voltage dividers are used to get the voltage bellow 1V, required by the ADC GPIO – it is working fine.
The third voltage divider lower the voltage bellow 0.4V, in order to power down the Pololu S10V2F12 12V step-up, by keeping the SHDN pin powered during sleep cycles of the ESP.
By setting GPIO12 on HIGH, the 12V module activates, and through IRL510 MOSFET I can control the LED light.
In my prototype the circuit works fine, but on my PCB design the third divider either not give me any voltage, or give me the same voltage as input, and the MOSFET is behaving glitchy – every couple of seconds it turn off and on. I’ve even managed to burn one ESP...
I’ve measure all wirings and connections, I do not have any shorts or wrong voltages... What am I missing? What else can I measure to identify the source of the problem?
The first 2 voltage dividers are used to get the voltage bellow 1V, required by the ADC GPIO – it is working fine.
The third voltage divider lower the voltage bellow 0.4V, in order to power down the Pololu S10V2F12 12V step-up, by keeping the SHDN pin powered during sleep cycles of the ESP.
By setting GPIO12 on HIGH, the 12V module activates, and through IRL510 MOSFET I can control the LED light.
In my prototype the circuit works fine, but on my PCB design the third divider either not give me any voltage, or give me the same voltage as input, and the MOSFET is behaving glitchy – every couple of seconds it turn off and on. I’ve even managed to burn one ESP...
I’ve measure all wirings and connections, I do not have any shorts or wrong voltages... What am I missing? What else can I measure to identify the source of the problem?