T&L Publications

Thanks for the information. I suspected that it was something like that When you are 79 there is so much new stuff in technology that has snuck up on a person.<p>Just like the so called disposable cameras. Somehow they are refurbished and reused. I had a few that I managed to talk my way to at a pla...

This may or may not be an electronics question. I have one of those candle or firestarters using butane gas and is the i gniter electronic or what?<p>Has anybody ever hacked one of these to see? I have an out of gas (not refillable) unit and am curious as to what causes the spark. As soon as it warm...

I think the prior poster missed the decimal point preceeding the .335 draw. By my figures I get 591 but is that in hours? I will admit admit that I am whistling in the dark since I don't know what I am doing. But if yoiu are using about 1/3 of a ma draw then it should last quite a while. Sounds like...

A 1N111 diode is used across the input and output of a LM7805 regulator and I don't see any listed in Radio Shack. Would a 1N4001 diode work in its place. I don't have a diode book so I am unable to compare them.<p>I presume that the purpose of the diode is to discharge the capacitor on the output u...

To make it easier to experiment with digital electronics I am trying to find James Melton who had an article in Electronics Now June 1999 in which he told about the BreadBlox and had details on making circuit boards. He had offered to sell the circuit boards but his email no longer works. Has anyone...

Hi Philba and Stephen, Thanks for the feed back. When I build the 5VDC circuitry I will use 10 uF capacitors.<p>The reason that I will use TTL (74XX) ics is that I have the 22 articles that Popular Electronics had, one aricle per month and they used TTL. And I have quite a bunch of TTL chips to play...

I grew up in an analog world and trying to learn a little about the digital world. Age 78 My first experiments in electricity were with a #6 dry cell (1.5 volts) and bell wire and nails for the core and strapping iron strips for the clapper of a buzzer. That was baack in the mid to late 1930's.<p>No...

Gee whiz gosh or hot diggety dog. Guess I can add some remarks to this goalless topic. Back in the dark ages (1949) while I was going to a trade school on the G. I. Bill (no job openings otherwise, and I didn't follow up on the training either. I got involved in a project to rescue a family from mot...

Guess I had a senior moment there. Yes it is a neon or I believe it to be. Sorry, my fingers do not always do what I am thinking.<p>I have a humidifier that does the same thing on a water bottle empty warning. So it does seem like it could be one of those cases of odd behavior that was mentioned by ...

My surge protected power strip started to flash the LED in the switch button. What does that mean?<p>Also the surge protected power strip was plugged into an APC UPS on the socket thaat is not on the back up power supply but is surge protected. Is that a factor in the flashing (about once a second) ...

More information. I bought a dc walwart today at a garage sale and I wanted to test it. I set the DMM on ac and put the probes across the output voltage. I got a voltage. I reversed the DMM leads and there was no voltage. I set the DMM on DC and I got a voltage but higher then with the ac setting an...

I would set the DMM on AC and if no reading reverse the test probes. If you get a reading on both attempts then you have ac, if a reading only on one then it is dc. However, I am a dabbler in electronics and not an authority. But that is how I would do it. HTH Greybie

Just trying to recreate the modules so I can do the experiments in the books. I know some electronics but not enough to design circuits. All I need is the circuitry so I can make my own OUTBOARD modules.<p>I learned electronics way back in 1943 and vacuum tube circuits are not like solid state stuff...

Hi Dean Huster, Wayback in August of 2002 you mentioned in here that you would try to help me get schematics of the L R OUTBOARD modules for the Bug Books I and II. And Gernsback folded Poptronics magazine so I didn't have an email contact for you.<p>Plus in October 2002 I had to have a 5 way bypass...

OOPS,
I forgot the author's name "Delton T. Horn" I typed that in to search and he wrote a lot of books. Greybie