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I used a 25K pot at first to get the contrast working:
- Vss at one end with 0V.
- Vout at the other end with -30V (built-in negative voltage).
- V0 at the wiper.
For a good contrast, the V0 wiper varied from -20V to -24V, with -22V for a good setting.
Robert
My Creality Ender 3 S1 Plus is a giant paperweight that can't even be used as a boat anchor, cause I'd be fined for polluting our waterways with electronic devices.
Not as dumb as yesterday, but stupider than tomorrow!
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DOH! sorry... always read the Datasheet first, always read the schematic correctly too (Vout) Tabarnak!
Where's the whip?
Steve
It's not a bug, it's a random feature.
There's no problem, only learning opportunities.
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maybe another solution... maybe, if not, broke my legs... again
try it first. Place a 10K resistor between Vout and VO, on Vo place a 1K resistor in serie. Now send the other resistor end to 5 Volt. What happen with the contrast?
If i'm not dumb it should do something. If so, in serie with the other 1K resistor, place a diode in serie. Anode to PIC, cathode to resistor end. Is it working? I have some doubt on that so far... -voltage against 0V and 5 Volt+diode plah plah. I really need to return on a bench... feel rusty here!
Last edited by mister_e; - 29th May 2006 at 15:19.
Steve
It's not a bug, it's a random feature.
There's no problem, only learning opportunities.
|
$99 USD per LCD.
I can't afford to do magic shows with these suckers.
Robert
My Creality Ender 3 S1 Plus is a giant paperweight that can't even be used as a boat anchor, cause I'd be fined for polluting our waterways with electronic devices.
Not as dumb as yesterday, but stupider than tomorrow!
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anyway, forget me on the previous, it will work yeah but not on the range you said... your method is good, keep it.
Steve
It's not a bug, it's a random feature.
There's no problem, only learning opportunities.
|
Nice job you did! Any spare MAX232 output on your board?
Last edited by mister_e; - 29th May 2006 at 15:49.
Steve
It's not a bug, it's a random feature.
There's no problem, only learning opportunities.
|
I'm not using any MAX232...?
Why do you ask that?
Robert
My Creality Ender 3 S1 Plus is a giant paperweight that can't even be used as a boat anchor, cause I'd be fined for polluting our waterways with electronic devices.
Not as dumb as yesterday, but stupider than tomorrow!
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