Search found 33 matches

by LucidGuppy
Mon Feb 07, 2005 10:13 am
Forum: General Discussion
Topic: Analog design training
Replies: 1
Views: 792

Analog design training

Hey Everyone,<p>I'm looking at enhancing my analog skills and found the following site.<p>http://www.ardem.com/<p>It seems very interesting but I was wondering if anyone else knew of training that involved practical analog design. Google wasn't extremely helpful.<p>Thanks...
by LucidGuppy
Mon Jan 24, 2005 5:36 pm
Forum: General Discussion
Topic: supper simple transmitter question
Replies: 18
Views: 3355

supper simple transmitter question

http://www.scitoys.com/scitoys/scitoys/radio/computer/computer_controlled_transmitter.html <p>Has a super simple computer controlled transmitter. Would this be a practical circuit for hobbyists? Is it low power enough to be fcc compliant? The site uses an am radio for demodulation and only transmit...
by LucidGuppy
Thu Jan 20, 2005 12:19 pm
Forum: General Discussion
Topic: solder past dispensers
Replies: 2
Views: 1148

solder past dispensers

Does anyone have a solder paste dispensor setup in their lab? I just wanted to see what other people were working with - especially their source for compressed air for the dispenser.
by LucidGuppy
Thu Jan 13, 2005 7:30 am
Forum: General Discussion
Topic: twisted pair
Replies: 3
Views: 1012

twisted pair

Does anyone know the capacitance per foot of 22 gauge twisted wire pair? Or a website containing such info?
by LucidGuppy
Tue Jan 04, 2005 5:48 am
Forum: General Discussion
Topic: atx power supply for hobby electronics
Replies: 10
Views: 2335

Re: atx power supply for hobby electronics

Exactly what I need - thanks very much.
by LucidGuppy
Mon Jan 03, 2005 6:55 pm
Forum: General Discussion
Topic: atx power supply for hobby electronics
Replies: 10
Views: 2335

atx power supply for hobby electronics

does anybody know how to wire pc power supplies for use in hobby electronics? google hasn't yet provided the needed information.
by LucidGuppy
Mon Jan 03, 2005 5:57 pm
Forum: General Discussion
Topic: Who makes the best basic compiler for Microchips Microco
Replies: 8
Views: 2353

Re: Who makes the best basic compiler for Microchips Microco

I've also used pic basic pro and have enjoyed it. Their manual is very good in my opinion and explains every code word in detail.
by LucidGuppy
Wed Nov 17, 2004 4:01 am
Forum: General Discussion
Topic: halogen lamps
Replies: 9
Views: 2414

Re: halogen lamps

Yeah after working on it and only applying the 12volts to the relays - they're busted. Does anyone know of websites that have tips for wiring ac electrics (safety - standard practices)? I'm gonna have to build my own relay board.<p>Thanks
by LucidGuppy
Mon Nov 08, 2004 5:38 am
Forum: General Discussion
Topic: halogen lamps
Replies: 9
Views: 2414

Re: halogen lamps

I applied 13 volts externally when the board was powered down and I measured the relays resistance. The relay conducts when the supply is 13 and not 18. I think I'm gonna cut the trace and insert a 7812 regulator circuit to bring the voltage down.
by LucidGuppy
Sun Nov 07, 2004 12:02 pm
Forum: General Discussion
Topic: halogen lamps
Replies: 9
Views: 2414

Re: halogen lamps

After looking at the circuit that I'm using to drive the halogen lamp - I have some more questions concerning 12dc 120volt ac relays.<p>The circuit's high volt dc supply is around 18 volts. The relay has a fet on the low side of the relay. When I turn on the gate the relay's coil can get 18 volts pu...
by LucidGuppy
Fri Oct 29, 2004 6:49 am
Forum: General Discussion
Topic: halogen lamps
Replies: 9
Views: 2414

Re: halogen lamps

I was talking about dimming and stuff like that. The lamp would be ones used in toaster ovens. I opened up the toaster oven to find a relay board. There are three control signals to the board. NMI HT and LT. The HT and LT go to two control fets that work on the relays to the toaster oven elements. I...
by LucidGuppy
Tue Oct 26, 2004 7:08 pm
Forum: General Discussion
Topic: halogen lamps
Replies: 9
Views: 2414

halogen lamps

How does one drive a high wattage halogen lamp?
by LucidGuppy
Fri Oct 22, 2004 11:09 am
Forum: General Discussion
Topic: Cheap type of solder mask
Replies: 4
Views: 1487

Re: Cheap type of solder mask

Minimum buy on this is 24 bottles - but I'll try other distributors and get it from them. Exactly what I need. Thanks alot.
by LucidGuppy
Fri Oct 22, 2004 8:34 am
Forum: General Discussion
Topic: Cheap type of solder mask
Replies: 4
Views: 1487

Cheap type of solder mask

Is there any type of acrylic or epoxy or some material that I could use as a cheap form of solder mask for solder paste reflow just around components? <p>It would have to survive 250 celcius and be easy to use. I was thinking nail polish - but I don't know if it would burn or not. I guess I might ex...
by LucidGuppy
Tue Oct 19, 2004 4:52 pm
Forum: General Discussion
Topic: 68000 ?
Replies: 0
Views: 696

68000 ?

I see the 68000 slowly going out of existence. I can only find chips in the Jameco catalog and they're going too. Are there any processors / manufacturers that will keep the chip going?<p>I'd like to use it because its easy to understand - and flexible too. And it has a low pin count.