Yahoo Groups archive

Analogue-sequencer

Index last updated: 2026-04-28 23:15 UTC

Message

RE: [analogue-sequencer] No PLED trouble anymore

2003-10-17 by Colin f

> Think I solved the problem. And again I did something pretty stupid. 
> For lines 15 and 16 are not used using the PLED they were hanging 
> lose in my enclosure and I didn't like that, maybe it would make some 
> shortcut somwere.

Pin 15 and 16 are the backlight supply for the LCD module.
With them shorted together thru 10R, you'd have been sinking 500mA, or
2.5 watts.
The resistor's only rated for half a watt or so, so it's not surprising
it burnt !
I cut off the wires for pins 15 and 16 on the cable to my module, and
made sure they weren't touching.
I'll add a note to the construction page to make this clear.
At least it was within the limits of the voltage regulator, so there
shouldn't be any permanent damage !

Cheers,
Colin f

Attachments

Move to quarantaine

This moves the raw source file on disk only. The archive index is not changed automatically, so you still need to run a manual refresh afterward.