T&L Publications

Trying to convert simple (a few lines and shapes) Autocad (actually Intellicad, a clone that can export nearly all Autocad Formats) to Gerber, not having any luck as a start. Have tried Autocad versions 14 and 10/11 in both Binary and ASCII DXF formats. From WinXP > Start > Run >Gerbcon Test.DXF, an...

I think without getting into the high precision receivers like land surveyors use, that kind of precision is too tight, in particular for individual readings. Some handheld units are able to average numerous readings to improve the accuracy. Once the European system is up and running, accuracy is sa...

I also have a drill doctor, the biggest one, and it doesn't take sharpening many of the big bits that you would pay $20 or more for to pay for the equipment, not to count the gas costs and time wasted going to the nearest tool supply (1/2 hour one way). Anything less than 1/8" is too small. If ...

Might check with local industrial/commercial electrical contractor, or demolition contractor. They might be happy to donate something gathering dust in their shop. A lot of times they are upgrading, and the old stuff is very serviceable. Also a shop that does industrial machinery rebuilding. Might a...

I have a 18F1320 where the UART works goes to TTL fiber optic transmitter (Optek OPF1412T) and Receiver (Optek OPF 2412). Using a 74LS00 Nand gate on the receiver with a 560 ohm pullup on the one NAND input and other tied to 5 volt, everything works fine at 9600 baud. Prefer using transistor inverte...

Update: 1: Although got a bunch of LED's and Photo sensors from Digikey, haven't touched it yet. Installed a couple of connectors on a short piece of fiber and was able to transmit/receive 9600 baud. Procedure below. And I realize that this isn't a high transfer rate, but it is all I need over the 2...

If this is outside in the North (Freezing temps), getting something to stick to the concrete long term is going to be an issue. Concrete is pervious and does allow water (vapor) to pass slowly. The moisture will travel to the glue surface and stop, and when the temperature drops below freezing, the ...

1: With regards to the brass tubes, seems I can easily buy "ST" connectors for around $8/piece, the mate with the emmitters/detectors I have. Some of those connectors are set up for a proprietry super glue, probably with a few wasted pieces, I could prefect the process, probably would have...

Well the slotted opto sensor turned out to be a Omron EE-SB5V-E reflective sensor. Ground away enough of the black plastic case to expose the LED and light sensor. Both were the sideways looking configuration, and there was a clear plastic lense I removed. I then checked the circuit again to ensure ...

That's what I call thinking away from the box. :) Any thoughts on colors, infrared sounds likely, but then couldn't easily see for troubleshooting, but then again with that thin fiber, there's not going to be much visible. I kind of leaning toward an off the shelf connector to enable others to easil...

Re: the well: Cost $8000 to drill, 30 years ago. Once in a while in winter need maybe $25 in supplemental electric heat. It's 1000' deep, 120' 8" casing below fresh water, 60' 6" casing below salt water, and bare hole rest of way. House is 2400 sq.ft., all gas including a little greenhouse...

Re: the well: Cost $8000 to drill, 30 years ago. Once in a while in winter need maybe $25 in supplemental electric heat. It's 1000' deep, 120' 8" casing below fresh water, 60' 6" casing below salt water, and bare hole rest of way. House is 2400 sq.ft., all gas including a little greenhouse...

Re: the well: Cost $8000 to drill, 30 years ago. Once in a while in winter need maybe $25 in supplelemental electric heat. It's 1000' deep, 120' 8" casing below fresh water, 60' 6" casing below salt water, and bare hole rest of way. House is 2400 sq.ft., all gas including a little greenhou...

The 120 is needed for heat. I need to communicate the enclosure temperature (to call someone if it's too cold), and well head pressure (the natural gas(no cost) is one of the fuels that a 12.5KW standby generator uses. The PLC manages the generator (along with other alarms like freezer temperature a...

The 120 is needed for heat. I need to communicate the enclosure temperature (to call someone if it's too cold), and well head pressure (the natural gas(no cost) is one of the fuels that a 12.5KW standby generator uses. The PLC manages the generator (along with other alarms like freezer temperature a...