Hi Guys,
I have received my GLCD Kit and have built it.
Everything appears to work except the LCD display. I did miss step 21 of the build due to accidently filling a couple of the holes in which it mounts. So I had to keep these hot while inserting the display.
I have checked the voltages on each pin of the LCD and find that they are a lot lower than the list provide on another post.
GLCD version is 1.5
Pin posted my
voltage voltage
1 8.2 5.3
2 7.1 4.5
3 5.9 3.7
4 2.5 1.6
5 1.3 0.8
6 0 0
7 2.3 1.5
8 8.4 3.9
9 5.7 3.1
10 2.5 1.7
11 11.1 4.7
12 12.5 5.1
13 0 0
14 4.8 3.2
15 4.8 3.2
16 0 0
17 0.03 0.03
18 3.2 3.2
19 3.2 3.2
20 0 0
Where should i start looking?
Re: GLCD
"Where should i start looking?"
Not at that table! There's an error there - 14 & 15 are VCC which is 3.3 V, so yours is correct there.
But the rest are too far off, so start looking around the voltage multiplier capacitors, etc. The GLCD generates internally higher voltages than the supply as you can see - pin 12 is the top of the chain, the components are the 10 μF electrolytic capacitors C13 - C16, and the 100 nF C8 - C12. Is one of the electrolytics the wrong way round? Also check for all the usual PCB-assembly nasties like solder splashes, damaged tracks etc.
Re: GLCD
Sorted thanks, reread the instructions and found i did out te capacitors around the wrong way.