Why We need decoupling Capacitor? Ever wondered what would happen if you jump over the decoupling capacitor in your PCB Layout design?
Without decoupling capacitors, the on-board microcontroller will not work properly because voltage fluctuations will send it to power-down mode to reset it.
Any attempt to obtain a reliable ADC conversion is futile, because the analog voltage source is almost impossible to stabilize. If you send a PCB without a decoupling capacitor to the site, you will encounter many strange problems due to greater electrical noise.
So, can placing a few decoupling capacitors randomly on the PCB solve the problem?
The placement of decoupling capacitors is essential to alleviate voltage fluctuations in the PCB drawing reverse engineer. If the capacitor is not placed in the correct position, the effect will be minimal. In some cases, the wrong placement of the decoupling capacitor is a problem in itself because it may absorb EMI coupled to the copper trace.
