14-02-2018, 00:28
(13-02-2018, 22:15)[Barrow4491 Wrote: On the issue of 20 x4 LCD’s I recently received a couple of serial units without the I2C module, and realising my mistake, I ordered the modules and attached them but they will not work with my AQ unit.
I noticed that the only difference is that the two capacitors C1 andC2 are missing from the two ex serial modules.
Do you know what the values of these SMD caps are? C2 appears to be a tantalum as it has a polarity marking, because I am sure that if fitted they would be usable again
Hi Jim,
Do not fully understand what you are dealing with serial modules? I'm used to buying both parts separately, and after soldering I've never experienced any problems.
For example on Aliexpress:
LCD 2004 5V yellow-green - the price is USD 3.29
I2C interface LCD 1602 2004 - the price USD 0.94
Good luck!