- I performed actual IC surgery - 3 Updates
- Software to calculate Ohms Law and other electronics math - 1 Update
| William Beaty <billb@eskimo.com>: Jan 31 01:47PM -0800 I PERFORMED IC SURGERY on an analog amplifier, custom dip-16. Removed the gold cover. Pretty huge 1980s stuff, gold-on-ceramic hybrid. But still. This was a custom IC, a patchclamp front end with a peltier- cooled discrete amp, with a tiny peltier block, thermistor, and a three-jfets diff amp. And a large piece of a dessicant pellet. The thermistor had gone crazy from old age, shutting down their -30C cooling. axopatch photos http://staff.washington.edu/wbeaty/chem_axopatch.html#photo I've never had leadbond chips open before. I mean, besides looking inside those ancient Western Digital 6805-type microcontrollers with the eprom window. Mantis inspection microscopes: still NOT cheap on eBay. ((((((((((((((((((((((( ( ( (o) ) ) ))))))))))))))))))))))) William J. Beaty Research Engineer beaty a chem washington edu UW Chem Dept, Bagley Hall RM74 billb a eskimo com Box 351700, Seattle, WA 98195-1700 ph x3-6195 http://staff.washington.edu/wbeaty/ |
| jurb6006@gmail.com: Jan 31 11:37PM -0800 You got to be fucking kidding. Well almost... |
| N_Cook <diverse@tcp.co.uk>: Feb 01 08:53AM On 31/01/2019 21:47, William Beaty wrote: > beaty a chem washington edu UW Chem Dept, Bagley Hall RM74 > billb a eskimo com Box 351700, Seattle, WA 98195-1700 > ph x3-6195 http://staff.washington.edu/wbeaty/ What state was the dessicant? I expected it to be the cause going to gel , like the breakdown of con-formal coating causing chip failure. I vaguely remember repairing an STK???? hybrid IC,fairly easy to break open, that had been dropped and getting away with "bonding" the failed usonic weld point , with silver loaded paint. |
| mogulah@hotmail.com: Jan 31 09:48AM -0800 > I'd welcome a piece of software that would calculate simple ohms law > things like determining the resisitor size or amperage, etc. Just buy a multimeter from a hardware store. |
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