T&L Publications

Connect21,
The cheapest programmers I have found are at:
http://www.sparkfun.com/shop/index.php? ... 3771&cat=3&<p>http://www.sparkfun.com
Then go to the Pulldown menu for Programmers,
then pulldown PIC.<p>Also http://www.kitsrus.com/index.html<p>LK

josmith, You are exactly right. Large DC drives, like the MaxLine and Maxpak S6R made by Reliance are actually a controller for a Four Quadrant Motor. (Three Phase Power with 12 SCR's)<p>1. Motor Forward (Under Load) 2. Motor Regen Forward (Deceleration Forward) 3. Motor Reverse (Under Load) 4. Moto...

I am trying to locate some Toroids that have the same physical Core properties as a 768T188/3E2A made by Ferrocube, but with a physical size that is about the same as an FT-50 or FT-82 or FT-87.<p> Any help on what the 768T188/3E2A Core is would be helpful, since I know nothing about Toroids.<p>Than...

2M MACHINING, Steps for perfect welds (if I can remember correctly) Get some scrap blade material and practice making a few before using good blade stock. Use Standard Blade stock, not BI-Metal type.<p>1. Cut Both Ends SQUARE with the cutter on the Welder. 2. The left clamp is fixed. So clamp the Le...

2M MACHINING, I was wondering if you have ever used a Blade Welder of this type in the past? What makes you think that isn't working properly. They are pretty simple and I have yet to see one that is defective. I have made a lot of welds on the units where I used to work.<p>If you wish I can tell yo...

Roddy, Nuts & Volts has what you want on p.27 of the March 2005 issue...... a Folded Dipole Antenna designed for 850 MHZ to Boost the Cell phone signal strength. Basically it is a piece of 300 OHM twin lead 6.4" long with ends twisted, then in the center of one side of the 6.4" feed li...

Dale, That is exactly what I want to do. I plan on charging a .68 MFD cap, then dump it into an External Coil.<p> Stephen, I am having trouble finding the Application notes describing switching supply design on the International Rectifier web site (www.irf.com). Can you give me the specific URL? LK

Stephen, thanks for the web site and your help.
I am looking at that site for more information.<p>Dale, I need this transformer to be around 3/4
inch or so, for this application. I am trying to make a CDI Ignition for small weedeater type engines.<p>Thanks.<p>LK

I need to locate a transformer that meets the following requirements:<p>1. Small Physical Size (Toroid/E-Core/Other) 2. Low/Reasonable Cost 3. 30:1 Step-up Transformer Input 6 VDC (Chopped Square Wave) running at around 17.5 KHZ Output approx. 180 VDC (Chopped Square Wave) Input - Primary approx. 15...

Here is another method that works just as well as a PACE Desoldering station.<p>Items needed: 25 Watt Solder Iron with CLEAN/TINNED pointed Tip. Radio Shack De-Solder Pencil with attached Bulb Solder, Flux and Small Screwdriver<p>For each pin of the IC that is being removed: Solder each pin with you...