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cheap adjustable square wave generator? (0.1-10hz)
Hi - I need to generate a square wave. A slow one. It does not need to be accurate at all. But I would like the wave to be as crisp as possible, as it'll be a clock for a shift...
Saturday, 2 October 2010 - 22:49
Favorite hand tools?
Hi - I'm working on figuring out the ultimate tool kit for myself. Do people have favorite tools? A couple of mine: scissors: Wiss 175E (these things are awesome) tweezers: Erem...
Friday, 1 October 2010 - 15:25
How is a "synchronous DC/DC" synchronous?
Hi - so I understand what a synchronous DC/DC is. But - I just find it confusing to call it synchronous. So you have two PWMs that are almost inverses of each other... How is that...
Thursday, 23 September 2010 - 16:52
Teaching soldering - what to have students make?
Howdy - I'm going to be teaching three soldering classes in the near future. The first class will be through hole soldering, the next will be basic surface mount, the next more...
Saturday, 18 September 2010 - 14:45
High end soldering equipment - how/what to choose?
Hi - I'm looking at purchasing a high end soldering station for my employer. In my professional career - I've only used Weller irons. At my last job, my iron was a WD1002 and I...
Saturday, 11 September 2010 - 03:14
AVR input capacitance?
Hi - I'm looking at the datasheet for an AVR (ATTINY45) and it doesn't seem to specify input capacitance. That is... odd. I'm trying to figure out the maximum number of nodes you...
Friday, 13 August 2010 - 16:20
Handling high currents (~75A)
Hi - I'm working on an active load for testing high power batteries. My goal is to be able to load it with about 75A. The power dissipation is not a problem. However, I'm...
Monday, 5 July 2010 - 17:36
Speeding up a relay
Hi - I'm looking at using some relays in an upcoming project. Datasheet here. They're a bit slow for my taste. What I'm wondering is this: could I overdrive the coil of a relay...
Wednesday, 21 April 2010 - 21:03
Can a silicon diode be used as an inaccurate zener?
Hi - I was just thinking about this... can you use a normal silicon diode as an inaccurate zener diode? I mean, if so I suspect it won't be nearly as accurate as a zener, but for...
Thursday, 15 April 2010 - 03:16
Who makes high voltage MOSFETs?
As far as I can tell - Ixys seems to have a monopoly on the high voltage MOSFET market. Same goes for IGBTs. They can make parts up to 4KV. Do they have any competitors? Or are...
Wednesday, 14 April 2010 - 21:56
Inexpensive source for nice Banana-banana cables
Hi - I'm working on setting up our lab with cabling. One thing I keep on buying and that we keep on needing more of is banana-banana cables. The cheapest source I've found so far...
Tuesday, 6 April 2010 - 14:11
Calling the logic chip gurus
Hi there - I'm hoping to find a buffer with complementary outputs. Or in other words - a buffer and an inverter on one chip. Does such a beast exist? My hope is to find a way to...
Monday, 22 March 2010 - 22:10

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