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Pogo pins
Hi there - I'm looking at making my own magnetic breakaway connector using pogo pins and magnets. I'm looking to see what pogo pins are available. Digi-Key doesn't seem to sell...
Mon. Mar 2, 2009 - 07:08 PM
magnetic connectors/quick release connectors
I'm working on a project for my bicycle. I'd like for there to be a cable going from my bicycle to my helmet. However, this scares me, having been in more than my fair share of...
Thu. Feb 26, 2009 - 02:03 PM
Choosing a MOSFET for carrying a fast analog signal
Hi there - I'd like to pass ISO 11898 (CAN) signals through an N-FET. I'm very comfortable using MOSFETs for power switching. This is the first time that I've wanted to pass a...
Thu. Feb 26, 2009 - 12:54 AM
solid state replacement for NC SPST relay?
Hi there - I'm looking for the functionality of a normally closed, single pole single throw (SPST) relay. Now - I know of the existence of SSRs. However, I think they may all be...
Wed. Feb 25, 2009 - 02:40 PM
SPI/ISP/reset oddness with ATMEGA32M1
Hi there - I'm working on a board that used the ATMEGA32M1. Its SPI peripheral is giving me trouble. Specifically, there are two sets of SPI pins, but only one SPI peripheral....
Thu. Feb 19, 2009 - 11:18 PM
waterproof connectors
Hi there - for a personal project I want to find some connectors that don't mind getting rained on. They will need to carry 4 or 5 electrical signals, two or three are low current...
Tue. Feb 17, 2009 - 06:26 PM
Finding inductance of an inductor at high speed (~10KHz)
Hi there - I've been looking at using something along the lines of this bad boy. It's a variable inductor, essentially. The inductance changes as you move the core over the coil,...
Mon. Jan 26, 2009 - 10:27 PM
Designing for high vibration environments
Hi there - I do a lot of work at work on electronics that experience high vibrations (maybe 10-100gs). So far - our company strategy seems to be to mostly ignore the vibrations. I...
Thu. Jan 15, 2009 - 06:18 PM
Designing a fault tolerant bus
Hi there freaks - I want to run a single cable with as few conductors as possible that carries CAN and power that will be subjected to all sorts of tortures. It needs to carry CAN...
Mon. Dec 15, 2008 - 10:38 PM
What in the hey is this component?
I've started up a little hobby of taking apart laptop Lithium-ion battery packs that have kicked the bucket. Why? At work - I design some fairly similar circuitry and like to...
Mon. Dec 15, 2008 - 10:27 PM
solar powered blinking LEDs
Hi there - I want to make a device that blinks two LEDs both with 50% duty cycle and with a 180 degree offset to each other. They don't need to be super bright - 1-2ma I'd guess....
Fri. Nov 28, 2008 - 06:36 AM
Where to find a cheap RGB LED matrix?
I want to make something like a 16x16 RGB LED matrix. I don't care too much about brightness or pitch. Sparkfun sells some 8x8s for $30. That's pretty spendy... You can buy...
Wed. Nov 26, 2008 - 06:37 AM

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