T&L Publications

A single op amp window comparator might interest some folks here. I can't say that I was closely following all of his explanations. The circuit intuitively looks great, however. If someone needs a window comparator sometime in the future, it is an easy circuit to file away in brain cells. https://m....

I experienced axial ceramic capacitors being mechanically fragile where the leads break off easily, especially if they get too hot when soldering. That was a good thing to think about concerning what else got blown besides the capacitor. Probably at least an op amp that the signal goes to next, got ...

Oh, I see now the capacitor was used for audio input.

That reminds me of the relatively large disc capacitors that I used to see soldered to the power switches of the 70s and early the 80s era audio equipment. The blue vinyl sleeve on them wasn't opaque. Those capacitors I'm thinking of are rated for much higher voltage than 50vdc since they are requir...

Sadly the truth is... Eat well or eat poor Good genes or bad Great, or poor family longevity .......a bus can still flatten you! My father in law, a smoker and drinker, suffered from laryngeal cancer. Before he died he asked me 'How did I get this cancer' "Because you did not die from the hear...

"Most Microwave ovens with digital panels have a % cook power setting which modulates the on off timing while the oven runs. You must have a very simple oven with just a mechanical knob timer or I don't understand why you are trying to make this timer thing since it already exists in just about...

For an Edison battery, I thought it would have been a nickel-iron battery, or could that be a type of alkaline battery?

That was crazy what he did. I was so error prone on my jobs I don't recall ever trying to ruin something on purpose. It just seems plain wrong anyway.

Len, that is a real pain to lose what was written. Thank you for trying. I have done your good idea.

Len, sorry that it just dissapeared like that; I didn't see it in my inbox!

I came back to this post to mention that I just remembered that I sent a PM to you a while back. It seems they aren't working. It did leave a copy in the sent box though.

I think I had some run-in with that box on the road. It seemed to have a bad connection in the past, causing static in my phone. I have passed by it on the roadside every now and then. I knew about the POTS acronym from here, but now I just found out about the SLC. That's too bad about the lost robu...

I just recently was thinking of those. There was a story on I think NPR about a school science project in which one had to get a message transported a short distance. They were talking about lobbing wadded notes. However the first thing that came to my mind was the stretched string and two sounding ...

I just recently was thinking of those. There was a piece on I think NPR about a school science project in which one had to get a message sent a short distance. They were talking about lobbing wadded notes. However the first thing that came to my mind was the stretched string and two sounding devices...

Youthinks pretty good. :) I appreciate it. Those descriptions seem pretty accurate to me. I can't remember exactly, but a senior tech was answering questions for a major SSR manufacturer. He was saying how with zero-cross types, it switches when the voltage crosses zero. He said those weren't suitab...

On this tablet, I would close the tab, open a new one, and then the forum link would be right there on the screen to click on.

The new way, as described, saves a click. Also, that link could get bumped off the opening screen with my prior way.

I tend to think that microwave heating is comparable to steaming for retaining nutritional value. A lot depends on how well-done it gets cooked, So steaming should be most gentle. Second gentlest should be boiling. In the case of the food being in the water as opposed to something like an egg shell ...