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Discussion Title Created date
Grounded mouse: good - bad - idiotic
I have a nice idea for grounding myself: Instead of touching the chasis of the PC (or some other grounded item) before playing with chips, I would install a small pad of aluminum...
Friday, 28 December 2007 - 12:54
PolySwitch for an Ampermeter?
Hi, Yesterday, I blew out the fuse in my multimeters ampermeter part. I don't have any left, and all of the specialized electronics shops are closed :-( . Can I use a PolySwitch...
Sunday, 23 December 2007 - 10:17
What sensor configuration do/would you use?
My students are making a line following robot, and they asked me about the best line following sensor. My reply was what I use (the output from a CNY70 is hooked up to the AVRs...
Friday, 14 December 2007 - 13:51
Why did tubes have inner coating or whatever
It's stupid question time again! In some glass tubes (vacuum tubes) I noticed that the glass in some parts of the tube was covered with some silvery material. And there always was...
Thursday, 29 November 2007 - 12:35
Best method for charging a homebrewed battery pack
Hi, I've got a little robot, it will runs on 12 or 16 NiMH batteries organized in groups of 6, 6 and 4. All batteries in one group are of the same type, however, not all groups...
Friday, 23 November 2007 - 22:18
New Atmel ref. design: A Battery charger/discharger....!
For those of you who do not read your monthly news paper: http://www.atmel.com/dyn/product... Looks useful! I'll certainly look into it, when I design any charger. Although the...
Tuesday, 20 November 2007 - 22:17
Parralelling L293
Hi, Can I connect a few L293B chips in parrallel, litterally, pin to pin, cause I need a bit more current than one can give me and the board's already done? Thanks, David
Tuesday, 20 November 2007 - 19:00
Has the volatile for ISR/main variables thingie been fixed?
Today, I tried something new. I've got this interrupt: in usart.c: unsigned char led; ISR(USART_RXC_vect)//interrupt vector for the PC usart { unsigned char a; a=...
Thursday, 1 November 2007 - 12:05
Should I spray my heatsink black, or leave it silver?
Hi, I'm making a heatsink for my robots components. It'll be actually a simple plate of alluminium, cut down and drilled to certain mech. specifications. Now, will it be better (...
Wednesday, 31 October 2007 - 21:37
Override jumper for a 7812?
Hi, In a project I wanna have a PSU like this: Batteries+(16V approx)-+-->7812--+->Motors and stuff | | | +--...
Saturday, 27 October 2007 - 13:38
How to run this and how powerful is it?
So, I couldn't resist my urges again at a fleemarket from a fellow I know and I bought this little thingie (see attatchment). It's a UV Mercury lamp, most likely a mercury arc...
Friday, 19 October 2007 - 22:30
Running the program while JTAG is connected
Hi, I've got an USB Key evkit and now I wanna play with it. I can program it just fine with the dragons JTAG (I also tired the Flip thingie, not musch succes). However, to run...
Friday, 12 October 2007 - 11:56