HP-25C Eumulator
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12-22-2014, 01:48 PM
Post: #118
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RE: HP-25C Eumulator
(12-20-2014 09:47 PM)BobVA Wrote: Attached are photos of a display filter test, using a defunct HP-21's front panel. Quite an improvement! Good call, I don't even notice your packing-tape fix. My son uses a similar DataMath at school and I tape a piece of "foam" (from arts & craft supplies) to the back so it won't poke his fingers. There is not much we can do about the LED brightness w/ the current "direct drive" design. And these bubble LEDs are tinier than most, so it's really meant to be a toy piece / occasional use rather than a work horse calculator. |
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