TI Programmer - Red LED - Key bounce

[Thomas Radtke]

(02-22-2014 01:22 AM)Marcel Samek Wrote:  I cleaned it all out with some compressed air.

Ah, canned air! I should try that as well. Thanks for this tip.

(02-22-2014 01:22 AM)Marcel Samek Wrote:  Just as an experiment I cut a rectangle of thick felt cloth (about 1.5mm) that I had laying around and put that in there before reassembling the calculator.

Not needed. While the keys rattle notably, they work well without any protecting sheet. Just make sure the calculator doesn't gather too much dust. For one of the TI-59s, I have a printer along with a cover(*) for this assembly. Works great.

(*) do I have to mention that this cover also shows signs of disintegration and some sewing work was in order? ;-)