Search found 12 matches

by mojorizing
Wed Sep 16, 2009 10:53 am
Forum: Up For Grabs
Topic: Magazines available
Replies: 0
Views: 1667

Magazines available

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
by mojorizing
Thu Oct 09, 2008 9:23 pm
Forum: General Discussion
Topic: Question About Automobile Noise Cancellation Technology
Replies: 8
Views: 1658

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...
by mojorizing
Mon Apr 07, 2008 9:00 pm
Forum: General Discussion
Topic: Humming Toroid Transformer
Replies: 7
Views: 1824

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...
by mojorizing
Thu Aug 30, 2007 11:45 am
Forum: General Discussion
Topic: 7805 voltage regulator
Replies: 3
Views: 1112

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

later, Kevin
by mojorizing
Thu Aug 30, 2007 8:49 am
Forum: General Discussion
Topic: 7805 voltage regulator
Replies: 3
Views: 1112

7805 voltage regulator

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,...
by mojorizing
Thu Sep 21, 2006 9:22 pm
Forum: General Discussion
Topic: N&V High-side switch
Replies: 3
Views: 939

N&V High-side switch

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, Kevin
by mojorizing
Wed Aug 23, 2006 12:42 pm
Forum: General Discussion
Topic: CD4011 vs. CD4049
Replies: 2
Views: 951

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...
by mojorizing
Wed Aug 23, 2006 12:23 pm
Forum: General Discussion
Topic: CD4011 vs. CD4049
Replies: 2
Views: 951

CD4011 vs. CD4049

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...
by mojorizing
Sat Dec 11, 2004 8:55 pm
Forum: General Discussion
Topic: HELP! Old Pro-2006 INTERFACE
Replies: 7
Views: 1406

Re: HELP! Old Pro-2006 INTERFACE

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 looks like a mod that was...
by mojorizing
Sat Nov 13, 2004 7:55 pm
Forum: General Discussion
Topic: TCP/IP Monitor
Replies: 8
Views: 1240

Re: TCP/IP Monitor

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>
by mojorizing
Mon Oct 25, 2004 9:16 pm
Forum: General Discussion
Topic: heating controls
Replies: 3
Views: 688

Re: heating controls

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...
by mojorizing
Thu Jun 03, 2004 7:40 am
Forum: General Discussion
Topic: Kite Camera Shutter Trigger
Replies: 11
Views: 1906

Re: Kite Camera Shutter Trigger

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