CGS programmer/sequencer (previous version) (view source)
Revision as of 19:03, 16 November 2018
, 5 years agono edit summary
(→Notes) |
No edit summary |
||
Line 29:
On the rear of the "B" board there are a number of small square pads, near the TL072s and the PSU connector. These pads are in pairs, one on pin 8, and its pair near by on the thick 0V rail, and one on pin 4, and its pair nearby on the 0V rail. These are for 100n 1206 (or even 805) SMD capacitors (or 10n, or 47n - it isn't critical). Put a little solder on one pad. Move the capacitor into position, and re-heat the solder. The capacitor will now be held in place. Solder the opposite end, then go back and tidy up the first joint if needed. Use ceramic monoblock caps, NOT electro or tant.
On the rear of the "B" board, below the LM393 there are two square pads connected to pins 4 and 8. These are to allow a 100n
This board set is a little different to most CGS boards. There would be too much wiring needed if pots had to be hand wired to the PCBs, so I have gone with a design that mounts as much as possible directly on the PCBs themselves, as well as making parts that do need wiring as close as physically possible to their wiring points. The photographs below will help explain things. If you wish to use a different panel arrangement, it would of course be possible to remote-mount the pots etc., though I expect you would soon be wishing you hadn't.
The vertical centers for '''ALL''' of the holes is 3/4 of an inch - standard Serge spacing for 8 vertical controls. Horizontal spacing is not fixed, but is best at an inch (Serge standard).
| |||