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A philopsophical problem regarding board assemblers
You really need to control your supply chain. Especially when doing business or subcontracting your assembly to China. This is much easier said then done as not many IC or...
Friday, 11 June 2010 - 05:59
dc to dc (1.5V to 5V)
http://www.holtek.com/PDF/consumer/77s1xv110.pdf
Wednesday, 9 June 2010 - 01:07
Using X2Y caps
What sort of load are u driving? Just saying a 8Mhz MCU is a little low on details. In short decouple the input with a LC filter, have local LC filter for MCU supply. Make sure...
Friday, 4 June 2010 - 01:06
My Great Project
Nice work. I love your entusiasm for electronics. oddbudman
Wednesday, 26 May 2010 - 05:39
Detecting AC power
Optocoupler sensing AC supply. IR transmitter to turn the tv on when power returns ? oddbudman
Friday, 21 May 2010 - 01:42
Avoid this Chinese PCB maker: Flypcb
Gee, thats no good Ross. Looking at that layout your clearances don't look very tight at all :( I've had a similar expereience while over here on some protoboards. Some houses...
Thursday, 13 May 2010 - 01:34
Using an oscilloscope to measure mains
Use an isolation transformer for the DUT. Don't isolate the CRO (otherwise your cro probes can go live). Make sure everything you use is properly fused and you are running off...
Saturday, 1 May 2010 - 01:49
Which multimeter to get
For a cheap meter, try and make sure it has an auto power off feature. Otherwise it gets expensive replacing the batteries after a while. I love my cheap meters, always got...
Friday, 30 April 2010 - 05:30
Simple DC-DC with wide Vin
Have you considered using the Avr as the dc:dc controller? Thats quite the wide input operating voltage in your spec. oddbudman
Thursday, 29 April 2010 - 15:34
What is this trace geometry for?
I think perhaps its so the tech can repair the board with a busted track fuse. For instance if the board fails during testing after assembly and the fuse goes, a simple drop of...
Thursday, 29 April 2010 - 04:43
More temperature stable analog Optocoupler
incal99, What i was suggesting is simply sending serial data from the input side via the opto to the secondary side. No modulation, just simple 8N1, manchester, whatever style...
Tuesday, 27 April 2010 - 01:53
More temperature stable analog Optocoupler
Could you use a 1.8V mcu with an adc on the input side? Just stick it behind a simple regulator and have it send packets to the other side using an opto? oddbudman
Monday, 26 April 2010 - 01:16

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