The Craftmans Shop > New from Old
JCB 803 Saga
awemawson:
I decided to mount the voltage regulator on flying leads off the board, and bolt it to the largish 0v copper plane on the main pcb as a heat sink - time only will tell if it is enough.
awemawson:
I think I will just snip off the thick mounting wires and bend them over as retaining tabs rather than solder them, so that I can easily disassemble it in the future should the need arise.
I should perhaps point out that this is a different display board from the prototype one in my earlier posts that used ic sockets - I decided to solder in the display and ic as it's likely to get a bit of vibration, and anyway the lower profile was an advantage.
So a quick test to see it works - phew it does - then a tweak with the pots to calibrate 'empty' and 'full', and all that remains is to cut a bezel to surround the LEDs and hide the electronics
awemawson:
So I cut a bezel - oh I like my Laser Engraver :lol:
Popped it in the hole, secured by a drop of super-glue and put it all together for a soak test to see how hot it gets.
awemawson:
That's actually the second bezel I cut.
Both were cut from some smoked brown perspex that I have squirrelled away that were water screens on my wire EDM machine that I replaced with clear polycarbonate. The perspex was a bit scruffy, so when it had been cut I cleaned it with IPA (Industrial Pure Alcohol - not the beer :drool:) and it instantly started forming stress cracks.
Now I've heard of this before but never seen it. The second bezel was cut from the same sheet, in fact with in a few mm of the first one, but this time I cleaned it with soap and water.
Have a picture of the cracks:
Bluechip:
Oh yeah, done it myself :doh:
One day at work on a IBM 1403 line printer, the print cartridge oiler reservoir was a Perspex block arrangement and it had some crap in it, so Dick-Ed here squirted it with AF spray .... :bang:
Just like dropping an ice cube into water .. :lol:
Didn't quite fall apart so I wrapped tape around it and ordered a new one. :scratch:
Dave
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