T&L Publications

So whats the difference in performance of large punch or small punch ? I never heard of this term before..

DC motors can be ok if you have a gear box and high gear ratio... all depends on your use. I have torn down huge plotter printers and they had DC motors and encoders, and high geared. and the encoder tape. I couldn't even see the lines on it unless i used magnifying lens.. big gear ratios are easier...

Oh well, It looked legit...

why not use a buck / boost converter ? Or get an adjustable driver..
what voltages and current are you working with?
What use of the leds ? constant load or intermittent ?
the more info the better..

grab you an old 8ft fiberglass dish....lol.. mount the mic. right where the feed horn went to.
seen a demo at a science fair before,, was impressive..

Sorry, i see that now.. Yeah, this isn't going to be feasible.
thanks anyway.

Dyarker >> what about the columns? is that going to be an issue as well ? gonna be really hard to make All that fit.. I don't think it's gonna be feasible to do.. I gotta do more thinking..Gotta see if there's something easier. too bad I can't just short out 1 led per segment.. then it would run off...

well, the thing is... Unknowingly I bought the backpack boards before i bought the led displays. I was hoping to resolve the issue by possibly with an adapter board, but that won't be possible. I have some other boards that drove larger 7 seg led ( TPIC6B596 ) It's easy to use too, but i haven't had...

Update to the Blue displays.. come to find out these displays need more power than the HT16K33 can supply, China Lied to me again..I told them i needed a low voltage Blue led display. the lady said the leds only need 3.2V to operate, But failed to tell me that the display had 2 leds in series per se...

cool deal...!!

At the bottom of this page and all other post, To the right of the REPLY button is a down arrow with some lines.
click that and it gives you the options on how to view the page.. newest to oldest or oldest to newest.. easy.

I kinda found something I am gonna tinker with.. I found in my Junk box a remote controlled Panic Button, and the receiver. I'm gonna tinker with it and see what it's range is.. It was for an alarm system at work long ago..

How would you connect the leads to the cell phone ? Certainly not thru the USB port, unless there's an adapter.
I sure wouldn't wanna push HV thru my ports..

That's a bit over my head..
I am not that good into circuit design.
I was kinds hoping to cobble something together or off the shelf..

I see one big problem with this. Will you be able to hear it? If the tester unit is on the same floor as the Breaker Box. Or maybe on one floor above where you are. Then you could hear it. But if your in the Basement where the Breaker Box is, and the Tester Unit is on a second, third floor, or high...