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PCB design files question
I'm confused (yes, I know...). In particular, I'm confused about how to include board outline info in the file package. I want to send out a PCB design to a couple of outfits...
Wednesday, 24 August 2011 - 02:55
What would you think of using a jumper to select crystals?
I have a potential requirement to design a board that would need to be configured for one of two oscillator crystals. I'm considering adding both crystals to the board and...
Friday, 19 August 2011 - 15:51
Question about LCD character displays
This is a question about the physical layout of LCD character displays - in particular, two-line displays like 16x2. And I'm referring to the type that have a single row of...
Tuesday, 9 August 2011 - 14:58
Electronic widget companies like Sparkfun?
I'd like to find (or build up) a list of companies that sell useful electronic gizmos for hobby and low-volume development needs. I'm not talking about component sources like...
Monday, 8 August 2011 - 02:18
Couple of PCB copper pour questions
I'm a software guy but I do an occasional PCB design as well. I'm doing a 2-sided 6" x 6" design now that will be sparsely populated (more connectors than anything else,...
Friday, 29 July 2011 - 14:58
More common 5.5mm power plug - 2.1mm or 2.5mm center?
Based on your experience, what is the more common 5.5mm power plug found on various wall warts - 2.1mm center or 2.5mm center? I'm designing a board that can take a wide range of...
Friday, 29 July 2011 - 01:03
MOSFET blow-out
As in low prices, not release-the-smoke. Browsing for parts for a project on the Mouser site and I ran across this mosfet (20V, 2.5A, very low turn-on voltage). Looks like Mouser...
Friday, 22 July 2011 - 18:55
IO via USB - how simple?
I want to add some custom IO to a PC and USB seems the natural route. Total IO would be on the order of 10-20 bytes worth. I know almost nothing about USB. I do know what's...
Wednesday, 22 June 2011 - 14:13
USB - RS485 converters?
I have a general question about USB-RS485 converters. Most of them (e.g. search "USB RS485" on ebay) have a connection for +5V or +9V. In your experience, do these devices...
Saturday, 20 November 2010 - 02:43
Algorithm question - flickering candle
Mostly to amuse the kids I've been playing around with trying to get a flickering candle effect from some yellow LEDs, and so far I'm not really happy with the results. I've...
Sunday, 24 October 2010 - 04:37
Professional Ada 2005 tools for AVR
I just ran across this, even though the news is a year old. http://www.adacore.com/2009/03/3... Interesting, just interesting. (I should mention that I think Ada is an excellent...
Friday, 21 May 2010 - 18:02
What's a good jellybean MOSFET for 3Vgs, 100mA?
I'm looking for suitable MOSFETs to switch around 100mA or a little more in a 3.3V system. 2N7002 and 2N7000 variants pop up in my searches, but I'm wondering if there are any...
Wednesday, 17 March 2010 - 02:06

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