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4 layer pcb, questions.
It is time for me to do a 4 layer pcb, I have experience with 2 layer but I am a 4 layer virgin. Where should I put the ground layer? Should I have 2 ground layers, 1 below each...
Saturday, 26 April 2008 - 01:49
PCB layout, components on both sides
Hi guys, I have laid out pcbs with components on a single side before, but now I need to do one with components on both sides. Are there any helpful pointers for me? What are the...
Saturday, 5 April 2008 - 05:47
5V regulator output not quite 5v?
Hi guys, Whenever I use a 5v regulator the output is always slightly above 5v, 5.05-5.10. I usually put 100uf on the input and 100uf with a 100nf on the output. I tried another 5v...
Monday, 31 March 2008 - 04:47
3 terminal 5v regulator, current flowing backwards.
Hi guys, I am working on a USB device, the 5v of the usb is tied to the output of my 5v regulator. When the device is powered totally off USB, I get about 4v on the input pin of...
Friday, 21 March 2008 - 03:35
PCB traces, thermal relief, solder mask.
Hi Guys, I am using a SMD 5v regulator, it is getting quite hot so I am going to put down a few traces on the ground terminal to try to conduct some heat away from the IC. My gut...
Friday, 25 January 2008 - 21:07
Looking for a linear step up regulator, 12v in, ~20v out
I am looking for a step up regulator that can take 12v input and output ~20 v @ 100ma or more. All the regulators i can across from digikey are pwm based boost converters, but I...
Friday, 2 November 2007 - 01:36
Serial EEPROM, reccomendations?
I am looking for a cheap and easy to use serial EEPROM. I am looking for a brand and family model reccomendation, I am not sure what the size requirements are yet. Regards, Alan To
Saturday, 15 September 2007 - 17:55
Op Amp help: My turn
I usually use the lm324 and it works very well. My recent app needs 1 op amp only so I decided to use a Texas Instrument ua741cd. Looking at the datasheet it looks like it should...
Friday, 7 September 2007 - 17:39
Debugging without a mk2?
I posted the same question before and I was not really able to get an answer. Hopefully someone can answer it now. Can I debug a linux program without the mk2, is there some...
Thursday, 5 July 2007 - 04:39
I have a habbit of always using eletrolytic capacitors for my projects. it has been pointed out to me that I should use ceramic/tan/etc... caps instead. What are the strengths and...
Wednesday, 20 June 2007 - 04:10
Hand soldering QFN package
I am looking to prototype with a 48 pin QFN device, I am a afraid of trying to do it without proper tools and knowledge. I have googled the subject and came up with lots of info....
Friday, 15 June 2007 - 02:22
I think I have the pine sap type of flux resin, how do you apply that stuff to the circuit? It is so hard, so I use my iron to apply it? How do you clean that stuff off the...
Friday, 15 June 2007 - 02:14