T&L Publications

I know that this post is a bit old, but here is what I used for years while checking door switches and and motion sensors in large buildings. You need two walkies, that will cover the expected area of use.At least one needs an external mic and earphone jacks. Both radios are set on a 'private' or qu...

I am working on a CNC control project and a question has come up. A common stepper driver module has a ' DIR' input. This switches the step rotation to forward or reverse with a voltage signal from the break out board. So the question.... Is there a 'standard' for the 'DIR' signal like + for forward...

You should be able to print any PDF by changing the paper size on your printer.
I just printed a full sheet PDF to a 4 x 5 card stock size.
The question is...Will you be able to read it that small?
Good luck

Thanks for all the responses, but the issue is still there. It happens ONLY in search bars like Google, Amazon and select others, When it happens if I press 'ENTER' and start again, it is OK. It is totally random and cannot be duplicated. I was suspicious that some accidental 'gesture' on the touchp...

Yup, I well remember when a decent request letter to someone like Emerson, or Philco would result in you getting a short note and a factory drawing long before Sams showed up. And now many people are quite content to pay for what once was free. Water, samples of all sorts, self-serve checkouts, radi...

I have used several similar steppers from Amazon with no failures, so maybe it's a dealer's choice! I would scope the windings to be sure the driver isn't getting buggy signals, since it seems to only do it at shutdown.....? Maybe try a different driver, like the ‎A4988, which is quite a bargain, ju...

Outside of an industrial setting, power factor correction is usually an exercise in smoke and mirrors! The utility company will hang capacitors at the distribution transformer for places like grocery stores with their highly inductive compressors and motors. To those that may be in a fog about all t...

Want a surprise?
Put an obsolete credit card in acetone. Cover it completely. After a few hours the card is dissolved and can be peeled apart to see the magic inside. Near field cards have more to see

Enjoy.....


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I've had issues posting if I'm using a VPN. Maybe it doesnt like them?

I've had issues posting if I'm using a VPN. Maye it doesn't like them?

The barcode scanner is just a USB input device. Instead of the scanner the barcode number can also be entered from the key board. In fact, with a scanner you can look up a product's UPC code and find info and sellers, in Google. I also use a scanner to scan the UPS label to send the tracking number ...

Hi CeaSar, Thanks for the shout out! This a pretty elaborate spreadsheet that is used to track attendee's for Camp COPS, a week long day camp sponsored by the Carroll Co Sheriff's Dept, MD State Police and other local law enforcement jurisdictions. The spreadsheet uses a barcode scanner to log the a...

I have two 'identical' spreadsheets that are supposed to have their formula, layout and format the same, so they should act the same! One sheet is older than the other, and the newer sheet is doing something wrong that the older sheet is not doing. It's expected to return the current time to it's ce...

Not sure about your vehicle or skill, but this genetric drawing may help.
You do not need a DPDT relay unless there is more involved than in your post

For all of those who do not possess a significant knowledge of chemistry and compounds, please be aware of the extreme dangers associated with DHMO (DiHydrogen Monoxide). It is common, widespread, unregulated and causes many deaths world wide every year. It is most certainly in your home and workpla...