Re: Marriage of antique and neo-nowism. (Microcontroller controlled 1910 "digital"clo
Many thanks!!!
I can't believe its still properly running (and near perfect time still) now 24 hours on!!! I spent a long time on this with it in nice easy "bits" to start but the mechanism and controller do need realy packing in so when it stopped working I've been loathe to un-pack it till now.
I had it working of sorts ages ago but it took me a while to get the timing bang on.. Starting using a 16f628a and with an actual RTC chip and crystal in a quest for accuracy but that was *real* lame time wise. 0.1second per minute out (I hooked up the PC to measure its movement pulses)... Too much error for my digitally expectant world! So then I got it to work perfectly (after several chip-deaths so now on a 16f88) using its extenal 4MHZ Crystal, perfect to
0.1s per hour avg accuracy) using my own simple timing loops. but then then I have had to take a 3 month break from it I've been away, so when I plugged my ICD lead into the nice (robbed off a photocopier) 3pin plug recently and it didnt work I had to take a while to carefully unpick everything. I got the chip out it's carrier to program it, but forgot WPUB (628 to 88 change to nRPBU) so I did find the ICD lead's veroboard track had broken (fixed now)
so this must be the most accurate one of these ever made I am sure... I had to sit down and count how many stepper pulses were in between each flick and put it in an array, but well worth it!!... I'll post a video I am that chuffed with it!!!
Many regards, thanx
NEAL
I am not quite that old but I remember taking to bits a "speak and spell" once...
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annd the only one ever with an ICD lead sticking out its bottom
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Ps keep hold of tubes for post nuclear!!!!!!!