| General > General Technical Chat |
| What's your favorite calculator? |
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| armandine2:
my TI59 - needs a battery pack - which I never had as it was on a printer. |
| David Hess:
--- Quote from: rsjsouza on October 23, 2022, 01:27:47 am ---This is plain evil... I put this as evil as the negative center tip on power barrel jacks of japanese musical instruments. --- End quote --- There is actually a good justification for center tip negative. It allows the built in switch to disconnect positive in a negative ground system, so ground remains connected and ground is connected first. |
| artag:
I have a selection of HP calculators and like them all, especially the 'Voyager' hp1xC series, but if I had to keep only one it would be the one I bought new - the HP16C. I probably use the 32SII more often though, as the 16C doesn't have trig functions and the integer features of the 32SII are just about sufficient for most needs. Non-hp / non-RPN calculators don't really compare. I just keep them as curiosities. But I like the keyboards of older Canons - Canola and Palmtronic with Nixie, VFD and LED displays. I'd really like to get another Palmtronic F5 like the one I owned nearly 50 years ago. |
| Calambres:
--- Quote from: David Hess on October 23, 2022, 01:18:39 pm --- --- Quote from: rsjsouza on October 23, 2022, 01:27:47 am ---This is plain evil... I put this as evil as the negative center tip on power barrel jacks of japanese musical instruments. --- End quote --- There is actually a good justification for center tip negative. It allows the built in switch to disconnect positive in a negative ground system, so ground remains connected and ground is connected first. --- End quote --- There's even a better rationale for that: it disconnects the positive side of the included 9V battery clip so it is irrelevant whether it is left without a battery connected, bouncing inside a metallic negative ground chassis. |
| artag:
--- Quote from: eti on October 23, 2022, 02:08:02 am ---The one GOD gave me, in me noggin ;) --- End quote --- I've got one of those but it's just not reliable for more than a couple of digits. |
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