Search found 87 matches

by Craig
Tue Aug 12, 2008 8:20 am
Forum: General Discussion
Topic: Where have you seen a PIC?
Replies: 7
Views: 2174

I race radio controlled cars, and recently opened up two of my Ni-Mh battery chargers, both of them had PICs inside.
by Craig
Sun Aug 10, 2008 6:21 am
Forum: General Discussion
Topic: Circuit theory to reverse polarity of 12V, <1 amp
Replies: 10
Views: 3937

Circuit theory to reverse polarity of 12V, <1 amp

Hi, I am in the thinking stages for a circuit that will reverse the polarity of a 12 volt signal that will draw less than 1 amp. This circuit is for my dad's garden railway and will be used to control a railway "frog" (as show here: http://www.trains.com/grw/objects/images/switches_4.jpg ). This swi...
by Craig
Fri Aug 08, 2008 7:23 am
Forum: General Discussion
Topic: First impressions of Digi-Key
Replies: 13
Views: 4674

First impressions of Digi-Key

Hi Guys, First of all I am in Canada, so I was a little apprehensive to use a supplier outside of my country, expecting long delivery times and crazy shipping costs. Well, I placed my first order with Digi-Key yesterday afternoon. Th order consisted of a few different sizes of resistor networks, som...
by Craig
Thu Aug 07, 2008 10:30 am
Forum: General Discussion
Topic: Resistor Bank IC
Replies: 5
Views: 1746

Thanks, I just had to figure out what those things are called, there was no mention of it in the article.

Now I know, and knowing's half the battle!

Craig
by Craig
Thu Aug 07, 2008 8:23 am
Forum: General Discussion
Topic: Resistor Bank IC
Replies: 5
Views: 1746

Resistor Bank IC

Hi Guys, In the article "Use the Pushbutton Rotary Encoder" in the August '08 (pg 52) issue of N&V, the schematic (and pics) show what looks like an IC that contains a bank of 470 ohm resistors. I have never seen one of these before, and there is no parts list or BOM for that project. Does anybody k...
by Craig
Mon Jul 14, 2008 11:21 am
Forum: General Discussion
Topic: Please help me in choosing web hosting
Replies: 4
Views: 2266

What type of server-side scripting do you need (if any), PHP or ASPX?

Do you require a database, if so, do you need MySQL, MS SQL, or something else?

There are tons of hosting companies out there. I use PowWeb.com. They are cheap and offer PHP and MySQL hosting. However, they are also pretty slow.
by Craig
Wed Jul 09, 2008 9:13 am
Forum: General Discussion
Topic: Getting Started w/PIC Microcontrollers - advice, please?
Replies: 10
Views: 4006

There's a newer version out, VB 2008: http://www.microsoft.com/express/vb/default.aspx
by Craig
Wed Jul 09, 2008 7:06 am
Forum: General Discussion
Topic: Getting Started w/PIC Microcontrollers - advice, please?
Replies: 10
Views: 4006

Hi, I recommend reading Chuck Hellebuyck's column Getting Started with PICs . I have been following them since they started in January 2006 and have found them to be a great resource. I have been able to build several projects based on his articles, and have also improved on a couple of his designs ...
by Craig
Tue Jul 08, 2008 5:46 pm
Forum: General Discussion
Topic: i need help to find a key switch
Replies: 11
Views: 3912

Robert, that is correct with most domestic vehicles, but most foreign vehicles, like my Acura, go OFF-AUX-RUN-START. A car ignition switch is probably more than $20 new, but you could probably pick one up at the auto-wreckers for $5 if you want to go get it yourself. Probably not worth the effort th...
by Craig
Tue Jul 08, 2008 11:30 am
Forum: General Discussion
Topic: i need help to find a key switch
Replies: 11
Views: 3912

It looks like gerty found it, specifically, part number 800FM-KM34. The key will only come out in the center position. The key will remain in the left or right position, it will not spring back. The left and right contacts are seperate from each other. In the center position the contacts are open, i...
by Craig
Mon Jul 07, 2008 11:57 am
Forum: General Discussion
Topic: Simple DC Power Supply Schematic Needed
Replies: 38
Views: 12261

Hi, I will try measuring C5 as you suggest. I will also try powering the train with my 3A test bench power supply to see if the delay is still there. It might turn on that it doesn't have anything to do with the power supply at all. This is the order in which we start up and notice the delay (note t...
by Craig
Mon Jul 07, 2008 11:43 am
Forum: General Discussion
Topic: Soldering Iron Temperature
Replies: 8
Views: 3147

Yes, that is the model I have. And yes, it probably is in C not F, sorry about that. So I guess I just set it for the type of solder I use, then maybe raise it up a bit so that the tip spends less time on the part being soldered.

Robert, what temperature do you run yours at?
by Craig
Mon Jul 07, 2008 5:57 am
Forum: General Discussion
Topic: Simple DC Power Supply Schematic Needed
Replies: 38
Views: 12261

Hi Al,

Sorry for not posting the details. Here is the schematic of what I built. I have ommited the AC-DC conversion for clarity.

Craig
Image
by Craig
Mon Jul 07, 2008 5:22 am
Forum: General Discussion
Topic: Soldering Iron Temperature
Replies: 8
Views: 3147

Soldering Iron Temperature

Hi, Last year a bought a fancy Weller adjustable temperature soldering iron, copmlete with a digital readout. However, there was no documentation on what the temperature should be for soldering different things. I have done multiple Google searches and could not find any info on what temperature set...
by Craig
Mon Jul 07, 2008 4:00 am
Forum: General Discussion
Topic: Simple DC Power Supply Schematic Needed
Replies: 38
Views: 12261

Hi, For the time being, I decided to build the power supply using two LM7824 voltage regulators. For the two 24 volt outputs, one is on all the time when the power supply is turned on, but the other one has a switch on it so it can be turned off when not in use. We tried the unit out on the railroad...