T&L Publications

I have old subscriptions of Circuit cellar, Popular Electronics, Electronics Now, Nuts and Volts and Poptronics starting from the mid 90's. If you want them, they're yours for the shipping. If you need a particular edition, let me know and I'll look. Shipping is from Arcata, CA, USA

Kevin

Hello, I’m somewhat versed on hyperacusis/ tinnitus because my wife has both due to a car accident a few years ago (airbags going off in a closed vehicle). I’m not an acoustical expert, only an engineer, but these are my thoughts: Firstly, my wife treats herself with ear buds that generate white...

What a coincidence, just last week I looked into the cause of the 60hz hum in my Altec ACS495 subwoofer. This came with an old WIN98SE Dell desktop, and they sounded great for a few years. Then I upgraded to XP, and there was no driver for them, so I lost the GUI for them, but I continued to use the...

Bingo! The tab is solder to the ground plane...thanks for the responses.

later, Kevin

I'm looking at a circuit used in a treadmill. There's a 7805 with the center (ground lead) that is clipped off and not connected. Why is this 7805 used this way? I recall long ago that this is configured as a current limiter, but I could be wrong.....Could someone get me up to speed on this? Thanks,...

The high-side switch depicted in the May 2006 edition of N&V, page 27 doesn't seem to work on my Electronics Workbench simulator. There's must be a typo. What's wrong with that circuit? I need a high-side switch to activate a reset line going to a reset pin of MCU, so load is minimal. Thanks, Ke...

Thanks for the reply, Philba. I have a tube of CD4049's and no CD4011's. I can understand if the circuit is a prototype and Radio Shack is closed and it's late at night and you don't have the proper logic components so you make a substitution, but this circuit is offered as a kit in production. Henc...

I'm building a circuit where the author uses a CD4011 Quad NAND gate as an inverting buffer between a MAX 232 and a 2N7000 N-ch MOSFET . Both inputs to the NAND gate is actually one lead, split to go to both inputs. Can I safely use an inverting buffer CD4049 (with the lead to one input) in it's pla...

Hi Tom, I've read N&V for a bazillion years and the only interface I can remember being covered is the "Programitt" interface to program a scanner that had the memory upgrade. Google "programitt" and you'll find it. However, this doesn't look like that interface. It sort of l...

This thread might help:wifi forum
A poster recommends a possible hardware solution on the second page of the thread.<p>[ November 13, 2004: Message edited by: mojorizing ]</p>

How about this gadget?<p> internet enabled thermostat <p>or are you interested in something you have to design and construct?<p>This gentleman did something similar for his security system.....adapting it to a smart thermostat would be a good project.<p> project <p>[ October 25, 2004: Message edited...

Hi Deal,<p>Check out this site about R/C photography:<p>web page