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Qrome
Adding a capacitor to the LED matrix increases the system reliability
After having a lot of hassle with distorted LEDs in the matrix and unreliable startup behavior after power-on I added a 10uF capacitor to the power pins of the first LED matrix element, see attached picture. This was a great improvement, startup always perfect and not a single scrambled display.
(and, btw, thanks for this nice project!)
A capacitor on the the power is always a great idea. Thanks for sharing. Looks great and easy to add.
Will a 1K ressistor or 10k or 220K work?
Well, a resistor is not a capacitor. So I don’t think it should work as intended…
Sorry, didn’t want to close this. Regarding the resistor, do you have some constructive input? Always trying to learn… ;-)
Constructive like helpful like constructief
What I mean is that I don’t have any idea what a resistor instead of a capacitor would do. Maybe you can help me to understand…
Groetjes vanuit Duitsland :-)
What I mean is that I don’t have any idea what a resistor instead of a capacitor would do. Maybe you can help me to understand…
Have a look here for a very simplified introduction: https://science4fun.info/resistors-capacitors-and-inductors/
What I mean is that I don’t have any idea what a resistor instead of a capacitor would do. Maybe you can help me to understand…
Have a look here for a very simplified introduction: https://science4fun.info/resistors-capacitors-and-inductors/
A capacitor stores a charge, like a small battery except it can charge and discharge much faster than the battery.
One use for a capacitor is to smooth out a power supply.
The purpose of adding a capacitor to the LED matrix between the power and ground pins is so that the capacitor can help power the display as suddenly turning on a lot of the leds at once draws a lot of power and the voltage regulator on the D1 Mini may not be able to provide that much power that fast, which causes it to crash as it gets starved of power.
Using a resistor would likely make things worse as a resistor uses power.
