T&L Publications

Has anyone ever thought of building a functional generator that produces sinewave, squarewave & triangle wave signals over a range of 1Hz to 20kHz or hgiher. I came across one design using the MAX038 (Maxim)chip. This chip also provide a TTL signal which make it easy to add an 8 digit frequency ...

Dean, your are absolutely right and I certianly respect your opinion. I must say I would love to have purchased a Tektronix unit but instead picked a cheaper alternative and for my purchase suits me satisfactory for the frequency of use. If quality, reliability and vendor support is a concern certai...

Fred, there was a goood article in Nuts & Volts about the Oszifox scope model. The disadvantage is teh built in screen is too small and you need to rely on having it connected to a PC in order to do any serious viewing of the signal. In my case I purchased their other product called the Multisco...

Fred, the Protek scope come swith a 1 year warranty. The manual is good. It is a typical analogue scope. Comes with 2 probes. I also thought of the Tektronix scope but pricing is too high for my use. Dave

Fred, ealier in the year I purchased a Protek 40Mhz scope from Circuit Specialist. I have found the scope to work well and really good value for the price at $319. Circuit Specialist generally advertize on the back 2 pages of Nuts & Volts. I found them to be very good and fast based on placing a...

Just to let everyone know I ended up buying the B2Spice A/D version 4 product from Beigebag. I have been impressed with their speed of response to my questiopns as well as the delivery of the product once I ordered it over the internet. Although I am still learning to use the product their documenta...

Here is a useful site http://www.ee.washington.edu/circuit_archive/circuits/F_ASCII_Schem_Tel.html#ASCIISCHEMTEL_002 that shows a simple LED indicator circuit for a ringing line. There are several circuits on this page. Another idea, that I have not tried. Since hte ringing signal is approx 84v 20 h...

I came across a very good web site listing all of the available circuit spice tools along with a brief assessment.
http://homepages.which.net/~paul.hills/ ... Spice.html<p>Dave

I have a similiar situation with my garage lights. I have a set of lights (4) mounted on oposite sides of the inside gargae wall. These lights are operated by two 3 way switches one located inside the gragre near the front garage door and other inside the garage beside the door entrance to the garag...

Al I noticed in your artiles that you adjusted the power supply in example 1 to have 5000 ohms, is this to represent the the resistance of a typical circuit that would be atatched to this filter or is it to repreent an internal resisitance of a power source. Also I noticed that in order to get the a...

Al, I read your article - it is a great one, well worth the read for anyone interested in starting out on using circuit simulation software. I think a great follow up article for N&V would be to cover full range of available software and the functionality that is offered. Provide a more indepth ...

Beginer, Yes I do have the manual for Circuit Maker. I downloaded from the site. I will send it to you if you will send me your e-mail address. I found the student version does not work as outlined int he manul under Windows XP but does under Windows 98. But I found the 30 day trial version works we...

I recently came across the B2 Spice A/D and v4 product from a company called Beige Bag Software. Has anyone tried this out. Their pricing appears reasonable. They provide a 30 day trial. the Tend heir web site is www.beigebag.com.N.

One of the best books I have come across is by Michael Tooley, Electronic Circuits Handbooks Second Edition. This book is filled with theory and a lot of practical applications. It provides you with a good level of understanding of the full range of passive and active components work. Sorry to say t...

My interest in circuit simulation programs has been rekindle for the past year with the attempt to recreate a number of the circuits that are presented in the various projects and in the TJByers Q&A forum such in Nuts & Volts. In some cases I thought why did I not think of that in terms of t...