T&L Publications

Here is a website of a company that manufacturers cell phone range extenders. I read that their equipment can extend the range to about 50 miles from a cell tower. http://www.wilsonelectronics.com/////////// This is a link that tells some more. http://www.wilsonelectronics.com////////////Files/Compe...

The cars I will be using with the flashing led's will not be on the track or be powered by the track. They will be part of a static display along side of the track. Went to Radio Shack all they have in flashing led's are red, but they have all the other colors I need that do not flash,so what I rea...

It has been my experience that if you connect regular LED's in series with flashing LED's all the LED's in that string flash at the same rate as the flashing LED. If you wanted too you could put two regular LED's in series with one of the flashing LED's and then a resistor connected to the 12V DC wa...

The simple way would be to use a blinking LED. Radio Shack p/n 276-036 is a red one. As with all LED's you need a current limit resistor. Give is more info as to the Wall transformer you plan to use and how many LED's you want to use. With the LED mentioned a 6V DC wall transformer and a 150 ohm res...

Bob,
You could measure the inductance in a round about way.
Create a constant current source and charge them up with the constant current source, while monitoring the voltage and the time, then do the calculation.

This company has some interesting devices that may be of help.
http://www.amazing1.com/ultra.htm

I used to work for a electronic distributor, and before a lot of stuff was imported from China. We sold a lot of auto electronics. Most of the antennas had RG-62 coax from the antenna to the motorola male plug. The impedance of RG-62 is 93 ohms. Hello k7elp60, are those call letters? If so, what ki...

I used to work for a electronic distributor, and before a lot of stuff was imported from China. We sold a lot of auto electronics. Most of the antennas had RG-62 coax from the antenna to the motorola male plug. The impedance of RG-62 is 93 ohms. The sensitivity of good guality AM/FM auto radios is r...

I have been using some DC lighting in my home for about 10 years, and it has been powered mostly by batteries charged with solar panels. I have 3 ea 75 watt solar panels that charge 4ea 6V 225AH golf cart batteries connected in a parallel/series configuration. The primary purpose of the the system w...

As a word of caution. I was working on the same thing several years ago for my mother who had to walk about 100 feet to a mailbox on the street. If you are in the US you may want to check with the postmaster general as at that time anything attacted to the mail box had to have his approval. Also rec...

Thyratron, ah I remember them somewhat. A vacuum tube filled with gas that when triggered on a grid, current would flow from cathode to plate and they would glow. A couple of numbers might have been 4C35 and 2050. They were used like SCR's today.

It is possible they fall into the catagory of class II transformers as described below: What is a Class II Transformer? A Class II transformer is used to supply Class II circuits. Class II transformers have a maximum VA (Volt-Ampere) rating of less than 100 and a maximum secondary output of 30 VAC. ...

To add to what MrAl has said. Incandescent lamp life ratings should be taken with a grain of salt. Life ratings are based on shock-free, vibration-free, ripple free testing. Lamps are not turned on and off during life testing, so there is no thermal cycling. Increased life can be obtained by deratin...

Hi Robert, Ohhhhh, so yourrrrr the one who invented the electric frying pan then, or was it the electric heater or toaster oven? <chuckle> On a similar note when I was a teenager I saw an article where one could cook hot dogs in about 5 seconds. The device had stiff copper wire about an inch long s...

Can't wait to hear from some of the old-timers such as myself. Dave I'm not sure what my very first project was but I recall one of my first ones. It was a two tube kit that was built breadboard style that used the 1.5V filament tubes. I got it working and then rebuilt it in a plastic cigar box tha...