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esp201 memory upgrade

PostPosted: Fri Dec 03, 2021 9:42 am
by nerezw
I was found a memory upgrade on an old esp201 but in the process of removing the old chip I blew off what looked like a resistor next to the user pins. If it is a resistor does anyone know what value it is so that I can replace it

Re: esp201 memory upgrade

PostPosted: Mon Dec 06, 2021 7:12 am
by rpiloverbd
If you share the picture of your board,marking the damaged part, may be someone can come up with help.

Re: esp201 memory upgrade

PostPosted: Mon Dec 06, 2021 4:38 pm
by btidey
I don't use that board myself but an on-line picture shows it is pretty simple. Here are my guesses.


Below the memory chip I think are two leds and two 12K resistors.
The capacitors either side of the crystal oscillator would typically be about 10pF
The resistor to the right of the oscillator is a 12K used to ties RES12K pin to GND
The capacitor above the CPU is probably a 3.3V power decoupling capacitor. One could verify this by checking the pads with a meter and if so they would go to the 3v3 and GND pins. Typically they would put either a 4u7 or 10u capacitor here.

But as said a picture of the damaged board would be helpful

Re: esp201 memory upgrade

PostPosted: Thu Dec 09, 2021 1:33 pm
by nerezw
Thank you very much, let me try the 4u7 capacitor