Search found 26 matches

by Deal
Thu Aug 19, 2004 1:21 pm
Forum: General Discussion
Topic: Digital Tachometer
Replies: 5
Views: 1975

Re: Digital Tachometer

George, imagine you want to tack spindle speed of your lathe. I started with the homebrew tack issues back in 1981 when I built one of the first digital bikeometers (using those great old intersil ICM7224 IPL chips and hall effect sensors) and still have the original wirewraped prototype. One way yo...
by Deal
Wed Jul 21, 2004 2:17 pm
Forum: General Discussion
Topic: Temperature controlled home brew
Replies: 18
Views: 4598

Re: Temperature controlled home brew

Looking for 20 amps at 230/240 volts is close to graduating you out of 'Home' brewing. That you mention 240v. makes me think you are not home based. 5500 watts is some freaking amount of power. How big are these pots? What in the fermentation (self generated heat) process needs enough power to melt ...
by Deal
Fri Jul 16, 2004 3:42 pm
Forum: General Discussion
Topic: A HVAC THERMOSTAT USING A PIC
Replies: 12
Views: 2831

Re: A HVAC THERMOSTAT USING A PIC

HVAC is a wide field. Most of the PC boards are proprietary and built around select and specific control sequences based on the HVAC unit's particular control requirements. My advice is you write your own, starting with the simplest flow chart, based on your control requirements. Colin's suggestions...
by Deal
Wed Jun 30, 2004 1:05 pm
Forum: General Discussion
Topic: Flexible Thermoelectric Coolers Anyone?
Replies: 13
Views: 3194

Re: Flexible Thermoelectric Coolers Anyone?

I have designed and fabricated thermoelectrics for medical devices. On East Coast US, I would recommend Melcor in New Jersey. Thermos are current hogs but can deliver heat/refrig control to small areas ( I also do freon refrigeration). Thermoelectrics been around decades and have been fashioned into...
by Deal
Thu Jun 03, 2004 3:19 pm
Forum: General Discussion
Topic: Kite Camera Shutter Trigger
Replies: 11
Views: 3319

Re: Kite Camera Shutter Trigger

Great ideas and posts. JWAX, though I'm averse to Walmarts, I have to see this $19 Vivitar camera. First phase is to get a camera airborn under kite power. Disp camera weighs 4 OZ so wright is priority. Battery driven solenoids or motors will be a heavy challenge. Sends me back to the 'rube' ice cub...
by Deal
Wed Jun 02, 2004 3:33 pm
Forum: General Discussion
Topic: Kite Camera Shutter Trigger
Replies: 11
Views: 3319

Re: Kite Camera Shutter Trigger

thanks Haklesup and Jwax. Its a suprise that you can buy a digital camera for 19 dollars. Everybody appreciates good clean ideas and Hahlesup's design of energy pendulum spring to wind and shoot is cool. Very nice original idea. One shutter timer I'm testing is a small frozen ice column that melts e...
by Deal
Tue Jun 01, 2004 4:02 pm
Forum: General Discussion
Topic: Kite Camera Shutter Trigger
Replies: 11
Views: 3319

Kite Camera Shutter Trigger

I am building a camera mechanism to fly lightweight disposable camera with a kite. Any suggestions on how to trigger the shutter? Distance probably 200 ft. My neighbor has an RC airplane controller, so some lightweight servo trigger might work. First phase is single shot, and then maybe a camera win...
by Deal
Mon Apr 05, 2004 3:25 pm
Forum: Robotics
Topic: CNC question
Replies: 12
Views: 5874

Re: CNC question

Thanks CeaSar, I have considered printers. Its a good idea. I wish I had skills to hack driver motor printer eproms but do not. Another problem is necessary stepup/increase in torque in step motors necessary to drive a plane of aluminum under a cutting head, or the parallel of motor requirements nee...
by Deal
Sat Mar 27, 2004 4:06 pm
Forum: Robotics
Topic: CNC question
Replies: 12
Views: 5874

Re: CNC question

Thanks Toe and JohnM. I have a plasma cutter that under constraints of 20 amp 120v can 'just' cut 1/8" aluminum. I built a pantograph (one of those scissor-like arms to copy drawings) to guide the plasma cutter head with result that it worked well but left too many jagged edges (that needed to be ha...
by Deal
Wed Mar 24, 2004 5:53 pm
Forum: Robotics
Topic: CNC question
Replies: 12
Views: 5874

CNC question

Artist seeks advice on moving XY plane carrying aluminum (maybe 1/8" 12 by 12 inch) on XY plane under plasma cutter. Is there any option to paying seven figures for software and table to drive resolution of ten mills? Has anyone hacked a flat bed scanner to do XY work? Anyone know of cheapest way? S...
by Deal
Sun Jul 27, 2003 5:20 pm
Forum: General Discussion
Topic: No FM on Amp
Replies: 2
Views: 830

No FM on Amp

Old Panasonic Technics SA 200 Amp (1989) everything works (aux and phono input) except FM. No schematic. Have limited electronic expertise. Any Help?