T&L Publications

anti gravity needs hi voltage and or magnetism I'm not saying this is real or not, but do we really know enough about anti-gravity to know what's needed to create such a thing? For some reason I always thought what was needed was some sort of shield to block the gravity that's there, not some syste...

I've had no problems. I've been using this address ever since I started coming here: http://www.servomagazine.com/forum/

THe red blinking power light means that the lamp unit cover is open. If it blinks even though the lamp cover is securley closed, the manual says to contact yoru Sharp dealer, lol.

That's interesting. To make sure I have this straight, what you are describing is an IC that will take a single 5V source and split it into two "individual" sources that are isolated from each other?

Can you tell I'm a newbie? lol.

Do you have an aftermarket radio in your car? If so, it may have a "cell phone" wire. This wire is designed to mute the radio when your (in-car) cell phone rings. You should be able to use that wire to mute the radio during an alert. Will these alerts happen regardless if the car is turn o...

Hi Robert, Thanks for your replies! I was a little confused about T1, I thought it was 44V split into two 22V lines to power each adjustable supply. I figured since the voltage is adjustable from 0-20 volts, that the transformer was putting out two 22V lines rather than two 44V lines. The reason I d...

Or how about supply #1 powering the meters for supply #2, and supply #2 powering the meters for supply #1? Or how about having the 5V supply power the meters for both variable supplies?

Hi, PIC has new chips that are replacing(?) the popular 16F876 and 16F877. These new parts are labeled 16F886 and 16F887. The new models seem to be superior in every way other than they use "Flash" program memory rather than "Enhanced Flash". What does the "Enhanced" fl...

Since it seems a few of us are going to attempt to build this PSU, and a few of us have had issues sourcing parts, I think this would be a good place to combine our efforts. The first thing that I am trying to find is the appropriate transformer. T1 on the parts list is described as "120V Prima...

Check if there's a pin-hole in the front of the tray. If so, stick a paperclick in there to manually open the tray. From there, pull it open and see if that changes anytyhing. Try putting a CD in it then closing it to see if you can read it.

Ok, so a resonator/oscillator is a generic term for anything that resonates/oscillates, and a cyrstal is the small two-pin device that the oscillator/resonator uses to determine the frequency of the oscillation. Did I get that right? Also, in most of the N&V schematics for microcontrollers, they...

I would like to see you test it with two batteries, like 9v cells to see if the noise goes away. I'll try that tonight and let you know what happens. I got the chips for free as samples from http://www.linear.com . When I ordered these samples they weren't offering the IC with the compensator and o...

Robert: In your case, you will probably never see swings large enough to approach either rail(assuming input voltages do not exceed certain levels).There may be a problem here if your inputs have to handle large range of swing as the output may exceed the power supply rails. The max temperature rang...

First, I want to say thanks! I was able to get it to work! I have a 13.8V Regulated DC power supply (left over from my R/C car racing days) which I built a 5V regulater for. So, I powered the LT1025 voltage cold junction compensator using that, and powered the Op-Amp using the 5 volt lead from an ol...

Hi, What is the difference between a Crystal, Oscillator, and Resonator? My locla electronics store has all three, but very few with three prongs is shown in most articles in N&V. To add more confusion, sometimes the N&V articles use the terms interchangably, for example "It even has a ...