Search found 48 matches

by ptribbey
Thu Aug 14, 2008 5:31 pm
Forum: General Discussion
Topic: Interview Questions
Replies: 4
Views: 1772

interview questions

How about stock price history and 401k matching.
Also maybe company provided tools and supplies. Calibration programs and such.
Paul
by ptribbey
Tue Aug 12, 2008 3:38 pm
Forum: General Discussion
Topic: Where have you seen a PIC?
Replies: 7
Views: 2456

I found one in an automotive battery charger from home depot. 16f628A
Paul
by ptribbey
Sat Dec 23, 2006 11:33 am
Forum: General Discussion
Topic: Opinions wanted for data through water
Replies: 11
Views: 2968

Thank you Robert, rshayes and others who took time to post. Yes the pulses will transmit one way temp data through the water up to the receiver at the boat. I was thinking about transmitting one 16 bit word every 30 seconds or so. That should give me resolution enough for tenths of a degree, and kee...
by ptribbey
Fri Dec 22, 2006 7:33 pm
Forum: General Discussion
Topic: Opinions wanted for data through water
Replies: 11
Views: 2968

No, the fish are not disturbed. There are commercial units available, and using one always means more fish. When you fish the big lake, you use what is known as a downrigger. It is a winch with a large weight attached. You cast out your spoon and then let the water take out more line, then you clip ...
by ptribbey
Fri Dec 22, 2006 6:55 pm
Forum: General Discussion
Topic: Opinions wanted for data through water
Replies: 11
Views: 2968

I was hoping to mount the pic and the battery in a small container around the size of a pack of smokes. I would mount the piezo and the temp probe outside the case. The device would be clamped to a down rigger for lake superior trout fishing. Finding the thermalcline is key for a good catch. Robert,...
by ptribbey
Wed Dec 20, 2006 6:06 pm
Forum: General Discussion
Topic: Opinions wanted for data through water
Replies: 11
Views: 2968

Opinions wanted for data through water

Would like your opinions on the best way to transmit data through water. This is the scenario: An LM34 driving a pic driving some sort of transducer. The range will be 200 feet to 0 feet. the receiver will be some sort of transducer driving a pic driving an lcd. It will measure water temp. My first ...
by ptribbey
Fri Jul 14, 2006 2:51 pm
Forum: General Discussion
Topic: variable pot with a fine trimmer
Replies: 23
Views: 6479

windows potentiometer/voltage divider calculator

I found a nice small calculator for free download.
I used it a couple times on my projects, and it works great!
Thank you to the author.
It is at:
http://www.yadtel.net/~ccp/potdesign/

Good luck
Paul
by ptribbey
Mon Jul 03, 2006 10:21 am
Forum: General Discussion
Topic: Ideas for battery powered heater wanted.
Replies: 28
Views: 7660

jwax, its a medical device for a physician friend. I dont know all of the details. Chris, Yes, I would like to buy some 1604's from you. do you subscribe to paypal? Again thanks for all your input. This is what Ive learned so far: The specific heat of water is 1 btu per pound for change in degrees f...
by ptribbey
Sat Jul 01, 2006 10:53 am
Forum: General Discussion
Topic: Ideas for battery powered heater wanted.
Replies: 28
Views: 7660

Thank you all for your ideas.
by ptribbey
Fri Jun 30, 2006 12:25 pm
Forum: General Discussion
Topic: Ideas for battery powered heater wanted.
Replies: 28
Views: 7660

Ideas for battery powered heater wanted.

I am working on a project where i need to heat 200cc of water from about 90f(+1 -5F) to 99f in less than an hour. One time use. It should be able to be run off one 9v or one d or c cell or possibly a couple aa cells. I have some ideas of my own but I always enjoy other peoples take on a problem. Tha...
by ptribbey
Mon Apr 11, 2005 8:49 am
Forum: General Discussion
Topic: info wanted on IBM 23f1040 driver card
Replies: 0
Views: 756

info wanted on IBM 23f1040 driver card

I've looked on the net for info on this driver card for a big IBM printer with no luck.
I was wondering if anyone here may have the print for it. The number is 23F1040.
it drives a servo , a stepper and a dc motor, and probably other things as well.
Thanks
Paul
by ptribbey
Mon Oct 04, 2004 7:47 am
Forum: General Discussion
Topic: MS 555 timer false trigger
Replies: 9
Views: 4957

Re: MS 555 timer false trigger

Update: Thank you all for your valuable input. I had been aware of some but not all of your advice. Last night I wired up some 74c14 schmitt triger inverters for a one second delay. They each drive an mps a64 darlington which drives the relay. The kids have been playing the game all morning with no ...
by ptribbey
Sun Oct 03, 2004 7:07 pm
Forum: General Discussion
Topic: MS 555 timer false trigger
Replies: 9
Views: 4957

Re: MS 555 timer false trigger

I will try using some twisted wire from the switches. About wires being spike transmitters, that may be true but it was the same malfunction when the relays were on board. To answer Dale's questions, 1: diodes on board, 2: relays and motors connected, AC off. I have scrutinized the supply rails with...
by ptribbey
Sun Oct 03, 2004 1:57 pm
Forum: General Discussion
Topic: MS 555 timer false trigger
Replies: 9
Views: 4957

Re: MS 555 timer false trigger

Thanks for your replies, but, as I mentioned in the third line of my original post "the output is diode protected" and my power supply is more than adequate at 12 volts at 32 amps. (computer style). Yes the input impedance is very high on these 555's, but it's looking for a voltage of 1/3 supply to ...
by ptribbey
Sun Oct 03, 2004 10:48 am
Forum: General Discussion
Topic: MS 555 timer false trigger
Replies: 9
Views: 4957

MS 555 timer false trigger

Hi All, I've run ito a problem I could use some input on. What I've got is (4) 555 monostabe circuits each on their own board, 12V supply properly bypassed and decoupled at the chip, wired for one second pulse (10uFd-2K,68K), The output is diode protected, goes by a set of 1 foot wires to a 12V rela...