Look at this schematic - Need help please - Page 3 - Electronic Circuits Projects Diagrams Free

Mosfet · 29th June 2003, 01:20 AM

Congratulations! You didn't give up. Feels pretty good, huh?

eightwgt · 29th June 2003, 05:27 AM

Mofset......

Feels great ! I am a happy camper. I was not about to give up ! The application I am using it for works very well and the circuit is perfect although the only problem is the tip of the conductor probe is getting eaten away a little at a time so that makes for constant adjusting.... If I lowered the voltage requirement can I still make it as sensitive ? Now the Darlington would be a good canidate right ? Doesnt it help increase the voltage so I could drop the voltage going into the probe...... I wonder if it would still get eaten up as bad ? I started turning it off as soon as it contacted the water and I got a reading.... that helps.
As far as the water level I made... Its a little crude but accurate over a 10' distance to about .002"-.003". I took multiple readings and averaged out the differance measuring with calipers, and it could be improved to a consistant .002" if I tighten everything up so measuring can be more consistant....

Anyway - Thanks again ! I appreciate it a lot.

Phasor · 29th June 2003, 11:44 AM

Quote:

the only problem is the tip of the conductor probe is getting eaten away a little at a time

Try using a silver or gold plated probe. It won't oxidise as easily.

**kinjalgp** · 29th June 2003, 07:57 PM

Use stainless steel probes. They won't have any problem of rusting or other reactions. I have used in my water level controller and its still working since past 6 years.

Nostrafus · 29th June 2003, 11:17 PM

Or you could use aluminum, it's already got an oxidized coating and water doesn't damage it, that's why it works so well with soda, I mean hell, soda is basically a weak acid and it doesn't even scratch aluminum, and even if it does get a scratch in the aluminum past the oxide coating, exposing it to air for roughly 30 seconds will put a new one over the scratch.

eightwgt · 20th April 2004, 09:25 PM

HEY GUYS

BEEN A LONG TIME........ but here is what I used that little gadget to build....... (well help build )

http://www.inshorepowerboats.com/cnc.../CNCROUTER.htm

Thanks again

Tom

PS anyone know any ideas on a DC motor control ??? :shock:

Crofty · 5th May 2004, 06:30 PM

Quote:

Originally Posted by eightwgt

Mofset

Thanks again.....

i just got an assortment of resistors... trying to figure out which is the 470 !!

Thanks

Yellow, Violet, Brown (then gold/silver for tolerance)

Steve

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29th June 2003, 01:20 AM	(permalink)
Mosfet	Congratulations! You didn't give up. Feels pretty good, huh?

29th June 2003, 05:27 AM	(permalink)
eightwgt	Mofset...... Feels great ! I am a happy camper. I was not about to give up ! The application I am using it for works very well and the circuit is perfect although the only problem is the tip of the conductor probe is getting eaten away a little at a time so that makes for constant adjusting.... If I lowered the voltage requirement can I still make it as sensitive ? Now the Darlington would be a good canidate right ? Doesnt it help increase the voltage so I could drop the voltage going into the probe...... I wonder if it would still get eaten up as bad ? I started turning it off as soon as it contacted the water and I got a reading.... that helps. As far as the water level I made... Its a little crude but accurate over a 10' distance to about .002"-.003". I took multiple readings and averaged out the differance measuring with calipers, and it could be improved to a consistant .002" if I tighten everything up so measuring can be more consistant.... Anyway - Thanks again ! I appreciate it a lot.

29th June 2003, 07:57 PM	(permalink)
kinjalgp	Use stainless steel probes. They won't have any problem of rusting or other reactions. I have used in my water level controller and its still working since past 6 years. __________________ "There is no way to peace, peace is the way!"

29th June 2003, 11:17 PM	(permalink)
Nostrafus	Or you could use aluminum, it's already got an oxidized coating and water doesn't damage it, that's why it works so well with soda, I mean hell, soda is basically a weak acid and it doesn't even scratch aluminum, and even if it does get a scratch in the aluminum past the oxide coating, exposing it to air for roughly 30 seconds will put a new one over the scratch.

20th April 2004, 09:25 PM	(permalink)
eightwgt	HEY GUYS BEEN A LONG TIME........ but here is what I used that little gadget to build....... (well help build ) http://www.inshorepowerboats.com/cnc.../CNCROUTER.htm Thanks again Tom PS anyone know any ideas on a DC motor control ??? :shock: