Search found 93 matches

by ljbeng
Wed Jan 05, 2011 6:43 am
Forum: General Discussion
Topic: Source for ISD25120P
Replies: 1
Views: 532

Source for ISD25120P

Does anyone have a source for buying the ISD25120P? I found some on Ebay but I don't think my purchasing dept will go shopping there....:)

Are these obsolete? We need a few for some repairs of old equipment.

Thanks!
by ljbeng
Wed Nov 18, 2009 6:47 am
Forum: General Discussion
Topic: A little help with RF on a PC Board
Replies: 3
Views: 846

A little help with RF on a PC Board

In our GPS product, we install 2 antennas and feed two cables to an RF relay with 3 N-style connectors. We can then select one antenna or the other and feed that antenna to a Trimble GPS receiver. Once powered, 1 antenna is used, we don't switch back and forth. It depends on which direction we start...
by ljbeng
Mon Jan 12, 2009 5:37 am
Forum: General Discussion
Topic: No More DTV coupons left
Replies: 61
Views: 8974

I was having trouble getting NBC on my DTV box so I emailed the affiliate in Hastings, NE. I asked if I needed a better UHF antenna. They told me that most affiliates in NE are transmitting both UHF for the digital and VHF for the analog Ntsc signal. After Feb 9, they are all moving the ATSC signal ...
by ljbeng
Wed Dec 17, 2008 11:43 am
Forum: General Discussion
Topic: Wireless Weather Forecast
Replies: 4
Views: 1308

It looks just like this one: http://www.bushnell.com/general/weather_fx_95-0007.cfm?section=General%20Use I was in a Walmart in Hastings, Nebraska and I only see Omaha as a listed state. It was $89. I will look at the Ambient engine a little closer. If I make it back to that Walmart, I will look a l...
by ljbeng
Fri Dec 12, 2008 7:40 am
Forum: General Discussion
Topic: Wireless Weather Forecast
Replies: 4
Views: 1308

Wireless Weather Forecast

Walmart has a wall mounted lcd display that get the current forecast from accuweather.com wirelessly (from FM Radio Stations?) How can I build this into my device? Is there a chip that I can incorporate into my design to receive this same information? Thanks.
by ljbeng
Mon Oct 13, 2008 12:19 pm
Forum: General Discussion
Topic: LED indicator on 4N25 Opto
Replies: 1
Views: 657

LED indicator on 4N25 Opto

I did kind of a dumb thing and had the boards made. I wanted to add led indication that the flow meter is sending pulses. The flow pulses (0 and 12vdc) go through a 3.3K resistor to pin 1 of the 4n25, pin 2 is grounded. Pin 5 goes to a TTL input PIC micro. The LED flashes but pin 5 only drops to 1.6...
by ljbeng
Mon Jul 21, 2008 12:08 pm
Forum: General Discussion
Topic: PC Based Pulse Generator; Does it exist or can one be built.
Replies: 12
Views: 2506

intents and purposes
by ljbeng
Tue Oct 09, 2007 1:05 pm
Forum: Up For Grabs
Topic: Pre-Sensitized Positive Acting
Replies: 0
Views: 1478

Pre-Sensitized Positive Acting

I have 12 of them. One sided. 6X6X.055" They are probably 6+ years old. They have been stored in a dark cabinet and do not show any damage in the silver plastic covers. Best offer accepted.
by ljbeng
Wed Oct 03, 2007 2:10 pm
Forum: General Discussion
Topic: Chevy Suburban Daytime Run Lights
Replies: 11
Views: 2824

Here is a little from the manual. This is a 1999. "The DRL system will make your headlamps come on at a reduced brightness when: Ignition is on, Headlamp switch is off and Parking brake is released." "When it begins to get dark, your DRL indicator light is a reminder to turn your head lamp switch on...
by ljbeng
Wed Oct 03, 2007 11:23 am
Forum: General Discussion
Topic: Chevy Suburban Daytime Run Lights
Replies: 11
Views: 2824

I remember someone trying the parking brake trick but then the parking brake light came on.... Maybe I can find the switch and force it closed. Thanks.
by ljbeng
Wed Oct 03, 2007 6:36 am
Forum: General Discussion
Topic: Chevy Suburban Daytime Run Lights
Replies: 11
Views: 2824

Chevy Suburban Daytime Run Lights

The run daytime lights on my Suburban are on all the time. There is a photosensor in the rear view mirror that points toward the windshield. Is that sensor supposed to turn the lights on if the daylight gets a little low? Has anyone torn apart the Chevy mirror to get to the electronics? Would the ph...
by ljbeng
Wed Aug 22, 2007 8:58 am
Forum: General Discussion
Topic: Revers Polarity Protection
Replies: 19
Views: 3857

chris, I like that idea and the board is usally powered by 24vdc and I only need 5v and 3.3v on the board so the bridge should not be problem.
by ljbeng
Wed Aug 22, 2007 6:07 am
Forum: General Discussion
Topic: Revers Polarity Protection
Replies: 19
Views: 3857

One of the points I wanted everyone to see was that if the 12 volts is connected backwards, the 12 volt line is now connected to the other devices ground through the serial port connection. I have considered all these ideas to protect the main electronics, but how do I protect from the reverse polar...
by ljbeng
Tue Aug 21, 2007 7:16 am
Forum: General Discussion
Topic: Revers Polarity Protection
Replies: 19
Views: 3857

Revers Polarity Protection

How would you protect things in the picture below from the power supply being connected backwards? (non-mechanical solutions please) The serial port may or may not be connected to another device. The other device may or may not have a common earth ground connection back to the use supplied power. I ...
by ljbeng
Wed May 02, 2007 11:13 am
Forum: General Discussion
Topic: Assembler Reference Z180
Replies: 2
Views: 1322

Assembler Reference Z180

Does anyone have a link to Z180 assembler mnemonics and definitions?