T&L Publications

Bob Scott wrote:What is "horizontal flicker"? Can you describe it in more detail?

Redacted

I looked into this before. I looked at a few designs and decided against it. Although people say that it does work, I got the impression that it takes a lot longer than I thought it would. If I remember right, the guy had a battery on it for 8 weeks and it regained 70% of it's capacity. It would no...

So often, actually, more and more we get this horizontal flicker across our TV. ... Would anyone know which one or is there anything else involved? Sure, any high voltage breakdown would glitch the raster, and appear as horizontal flicker or flashes. If the problem is getting worse you don't need t...

I want to replace the old circuitry with a PIC driving some MOSFETS into the step-up transformer from the old inverter. I'd like to get a 60 hz sine wave (or something close) out of the transformer, not the funky looking square wave (ish), using PWM or something. If you're interested in the system ...

Actually, my problem has disappeared! But only as I have junked the previous router in favour of a new one. This was probably the solution some months ago, but I stubbornly wanted to fix the problem and not just buy new hardware. I liked your experiment suggestions and I was going to try them before...

Wondering about if a variac could be used as an attenuator in speaker level circuits. Probably not, or at least not well. The audio signal covers about four decades of bandwidth, while a variac operates on a single frequency (or limited range if spec'd for 50/60Hz). In PA systems for large building...

Michael Kaudze wrote:Hi Bigglez, I belive tmort is talking about the NV article: Build a Switching Regulator

Got it! Should be all the OP needs to read and then build their project.

OK, you come out serial and then what? Feed the serial data to an SR and latch the parallel data into the LEDs. Simple, really. Do you know of some real cheap LED display (four digit at least and nice BIG numbers like 1/2 inch) that incorporated serial input? No. Am I missing something? If a $3-4 u...

EPA III wrote:I said "rotary". I meant thumwheel switch. About $5 and it is the only component you need. Seems to make sense to me.

Okay. But why the red ink?...

MrAl wrote:Hi,


Wow, 1000 piece pricing is up around 12 dollars US each.

Citation needed

With Garmin, that will cost an arm and a leg and still you may need a european unit to run them on. So, last trip we rented the Garmin GPS unit in the USA, and we had no trouble using it in Italy. I don't understand why that can't be repeated using the new Garmin and the maps for the destination (i...

I checked pin 3 with system powered P3 = 5V. After pulling setting pin 3 LOW P3 = 2.5V. If P3 is a standard uC IO pin it should swing very close to ground (logic zero) and very close to the supply (logic one). Have you tested it with nothing connected? Sounds like a conflict with another port pin a...

Try deleting it for grins and see what happens: "route delete 169.254.0.0 mask 255.255.0.0 192.168.1.100" Okay, ran route print, deleted the entry as requested, ran route print again, then routert as before. No change to the first two timeouts. Pictorially: http://www.stonard.com/NandV/ro...

I see that these inductors are rated at 3 amps as is the LM2576. I'm only looking to draw less than 500 mA. Can I use a lower rated inductor? Take care doing this mod. The current in the inductor is proportional to the load current, but not the same. In a flyback converter the energy transferred on...

A BCD rotary switch should provide the range selection I need with only two or at most three INs. BCD? Why? Wouldn't a rotary digital pot and human feedback from the existing readout LCD/LED suffice? Turn pot up or down, fix value by hitting 'enter' button adjacent to the pot. Or, use a digital enc...