T&L Publications

A flashlight with 50 Farad capacitors? For who - King Kong? A 50 Farad capacitor is going to set you back $200 to $400 each and it looks like they weigh 10-20 lbs a piece!

If you're already used to programming in PBasic, I'd switch to SX/B - which Parallax offers as a free download. An SX processor (a PIC clone running at a faster clock rate) running at 75 MIPS will cost you $3.50 http://www.parallax.com/sx/index.asp . A development board will cost you $10 and the SX-...

Robert,

These prototype boards look identical to the Radio Shack versions - and they're cheaper (I haven't tried them myself):

http://www.elexp.com/pro_pb11.htm

http://www.elexp.com/pro_pb18.htm

Check the trimmer mfg's web site for instructions on how to change the batteries. Due to government regulations - they're required to post instructions on how to dispose of rechargeable batteries in their devices.

A Basic Stamp and a PIC aren't the same thing. A Basic Stamp has an on-board voltage regulator, crystal, Microcontroller, EEPROM and a RS232 serial to TTL converter circuit. A PIC is just a Microcontroller. If you want something less expensive than a Stamp then check out the Parallax SX processor wi...

How about a simpler solution - wireless video camera mounted on the kart, and wireless receiver and a pair of walkie talkies.

My prices assume you'll need to buy a box of photo paper ($10), and a set of tungsten carbide drill bits ($10), a bottle of etchant ($7) and some PCB laminate ($3). It typically takes me 3-4 hours to image, touchup, etch, clean and drill 1 PC board.

The real question is how much time do you want to spend imaging, etching and drilling the PCB's? In my experience, you'll probably spend 10-15 hours to build 3 PCB's and it will probably cost $30 in materials (PCB laminate, photo paper, etchent and drill bits). By comparison, www.batchpcb.com will c...

Hmm, it seems most of the popular items listed on HSC Electronic Supply's advertisement in Nuts and Volts never seems to be available. Case in point, I got the January issue today and saw a Sharp Color 10.4 inch LCD P/N 20784 for $14.95. I did a search on their web site - it doesn't exist. I've trie...

From the Parallax forum's:<p>Dear SXers: Today we launched a fabrication run for the SX Blitz (our SX programmer, sans debug). We decided to bring it back to our customers for the following reasons:<p> * Promotion for the Parallax SX product line * Low-cost entry point for experimenters and educatio...