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| Thread ID: 60598 | 2005-08-06 22:10:00 | Astable Multivibrator | Dannz (1668) | PC World Chat |
| Post ID | Timestamp | Content | User | ||
| 378935 | 2005-08-07 03:43:00 | thanks i will put that on | Dannz (1668) | ||
| 378936 | 2005-08-07 06:09:00 | I think this is what you are looking for: www.temp.eleinmec.com oh yes that looks a lot cheaper than $27 |
ERR (8231) | ||
| 378937 | 2005-08-08 03:35:00 | Having another look through the thread I noticed that you had a problem with the pin numbers. DIL chips ("dual in line") are numbered like this: Looking at the top of the package, with the "notch" or "dot" (always on the top left, by pin 1, if it's there) to the top, start counting 1, 2, 3, 4 ... down the left hand side. When you reach the bottom, at "4" for a 555, do a U turn and continue counting: 5, 6, 7, 8... up the right hand side. On a 555 pins 1 and 8 are the two pins at the "top", and 4 and 5 are at the "bottom". That works on all DILs from 4 pin to 64 pin. It gets very confusing if you try to work out the pin numbers when looking at the bottom of the board. (I never, ever, work from the bottom of the board.) I tend to draw my own circuits with the pin numbers in correct order. I see that most PCB design programmes don't. But I'm usually working with Veroboard so it helps me to work out the layout as I go. I use wire-wrap so I don't have problems with accidental connections between tracks. :) |
Graham L (2) | ||
| 378938 | 2005-08-08 04:59:00 | Thanks | Dannz (1668) | ||
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