Search found 10 matches

by n7hqk
Thu Nov 11, 2004 6:51 am
Forum: General Discussion
Topic: BSII Pulls For Cheap...
Replies: 2
Views: 779

Re: BSII Pulls For Cheap...

Sorry, you know what happens when ya ass-u-me.... <p>check out : http://www.parallax.com/detail.asp?product_id=BS2-IC for full specs and photos.
by n7hqk
Tue Nov 09, 2004 6:05 pm
Forum: Robotics
Topic: Basic Stamp Pulls For Sale
Replies: 0
Views: 1486

Basic Stamp Pulls For Sale

First, I am not in the business of selling stuff.<p>I just don't want these to go to the great storage shelf in the sky!<p>I have pulled a small quanity (40) of fully functional and clean Parallax Basic Stamp II's (Green Board) from some industrial controllers while upgrading a customers project rec...
by n7hqk
Tue Nov 09, 2004 6:02 pm
Forum: Robotics
Topic: Power inverter
Replies: 2
Views: 2161

Re: Power inverter

Google for Vanner, Outback or Trace ( they have changed their name I think... ) They all make stackable 120 V 4kw units that can be configured to output 240 VAC at 8kw. You can also use a step-up transformer to accomplish the same.<p>Good luck!
by n7hqk
Tue Nov 09, 2004 5:52 pm
Forum: General Discussion
Topic: Lamp Current vs Voltage
Replies: 40
Views: 9809

Re: Lamp Current vs Voltage

Carbon is a Negitive Coefficent Conductor. I used to run carbon arc projectors for movies. When the arc is established, the carbon of course heats to white hot and the current in the circuit DROPS to a relitivly stable point. Some units used this to automaticly adjust the arc gap with a spring and s...
by n7hqk
Tue Nov 09, 2004 3:24 pm
Forum: General Discussion
Topic: Large power diodes and IGBT
Replies: 8
Views: 1206

Re: Large power diodes and IGBT

Find the components you need at one of the mfgrs then fill out their free sample request form on line. ON, Freescale, (formerly Motorola) IRC etc. all have sample programs with great response.
by n7hqk
Tue Nov 09, 2004 12:56 pm
Forum: General Discussion
Topic: encoder chip
Replies: 5
Views: 1053

Re: encoder chip

Think about a low end PIC or other MPU... They cost about $2 and don't need much in the way of support components.
by n7hqk
Tue Nov 09, 2004 12:52 pm
Forum: General Discussion
Topic: Timer Specs
Replies: 4
Views: 1070

Re: Timer Specs

I posted the same reply to the other Thread too...<p>Stuff a PIC in the circuit... A simple timing loop will allow you to delay from millisecs to months! one of the 8 pin flash versions like the 12F629 is around $1 in low quanities and needs only a power supply & filter cap for external parts. Check...
by n7hqk
Tue Nov 09, 2004 12:36 pm
Forum: General Discussion
Topic: Long Duration Timer
Replies: 3
Views: 927

Re: Long Duration Timer

Stuff a PIC in the circuit... A simple timing loop will allow you to delay from millisecs to months! one of the 8 pin flash versions like the 12F629 is around $1 in low quanities and needs only a power supply & filter cap for external parts. Check out www.melabs.com for a slick programming package.....
by n7hqk
Tue Nov 09, 2004 12:20 pm
Forum: General Discussion
Topic: Metal detecting
Replies: 20
Views: 3746

Re: Metal detecting

How'a'bout using a radar (M/W) door opener? they are available on the surplus market cheap and will respond to a small metalic object passing in front of the antenna. Set up the sensitivity to activate for the size/distance to/through the plastic pipe... (I used a similar system to detect nails in w...
by n7hqk
Tue Nov 09, 2004 12:09 pm
Forum: General Discussion
Topic: BSII Pulls For Cheap...
Replies: 2
Views: 779

BSII Pulls For Cheap...

First, I am not in the business of selling stuff.<p>I just don't want these to go to the great storage shelf in the sky! <p>I have pulled a small quanity (40) of fully functional and clean Parallax Basic Stamp II's (Green Board) from some industrial controllers while upgrading a customers project re...