design help

Do you have a question? Post it now! No Registration Necessary

Translate This Thread From English to

Threaded View
I'm ok with fixing and adapting circuits but not so good with design.  I've
come up with an electronic switch circuit but I think it could use
improvement.  The goal is to turn on a 12v relay with a switch that is
closed when off and open when on.  The switch also has to have one leg
grounded.  It's a pressure switch with a single terminal.  I also want the
relay to stay closed (on) for a couple minutes when the switch goes from on
(open) to off (closed).  Here's what I've got now and it does work.  But I
had to use a pretty big capacitor and I'm still only getting about a minute
of delay when going to the off state.  Because I can't make the 10k resistor
any bigger.  I'm thinking that it is likely possible to get a longer delay
and do it with a smaller capacitor if I was better at designing this.  The
other flaw is that this slowly lowers the voltage to the relay until it
drops.  The relay stays pulled to about 3 to 4 volts.  I also suspect there
is a better way to keep it fully on until the rc timer expires.  Thanks in
advance for any suggestions :-)

http://home.earthlink.net/~jamesgangnc/schematic.jpg



Re: design help
Quoted text here. Click to load it
If it would be better to do the timing part with a 555 I could go that way?
Not sure about what it would look like though.



Re: design help

Quoted text here. Click to load it

---
Something like this, I suspect: (View in Courier)

.+V>--+---------+-----+------+--------+----------------+
We've slightly trimmed the long signature. Click to see the full one.
Re: design help
On Tue, 24 Feb 2009 10:34:44 -0600, John Fields


Quoted text here. Click to load it

---
Oops...

.+V>--+---------+-----+------+--------+----------------+
We've slightly trimmed the long signature. Click to see the full one.
Re: design help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Re: design help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Re: design help
On a sunny day (Tue, 24 Feb 2009 10:43:00 -0600) it happened John Fields

               +12000 mV
              resi-sister
               5V zener

switch ---- PIC 12FXX --- MOSFET --- relay.
  |            
 ///         capacitator
                 |
                ///


5 components.



Re: design help
On a sunny day (Tue, 24 Feb 2009 12:22:33 -0600) it happened John Fields

Quoted text here. Click to load it

There is a no ifs about it that a PIC 12 .. is a cheaper, better, and faster
soltion.
keep your insults for yourself.


Re: design help

Quoted text here. Click to load it
soltion.
Quoted text here. Click to load it

A PIC10 can be had for 27.8 cents each in 1's at Newark.  Still much
cheaper than a PIC12 and even cheaper than a 7555 or 555.  However,
the tools set you back another $50 or more -- plus the assembly and
MPLAB learning curves.

Without using any IC at all, an analog solution using a 47uF cap and a
2Mohm resistor, roughly, would include a few pennies for a BJT or two
and a mosfet and a few resistors and a diode or two and provide very
long delays, reliably, with sharp transitions on holding the relay
without the programming tools and learning curves and even avoiding
ICs, altogether.

Jon

Re: design help

Quoted text here. Click to load it

One transistor was my first thought. So simple that there must be countless
links.
Google time delay relay 2n2222 or somthing like that.
A 1 Meg resistor and 1uF cap has a time period of 1 second



Re: design help

Quoted text here. Click to load it

I took a careful look at the OP's situation and didn't "see" a one-BJT
solution that provided clean, sharp relay drive on and off.

I'd probably learn something from you here.

Quoted text here. Click to load it

I like the solution I have in mind, already.

Quoted text here. Click to load it

Yes, I can multiply, too.

Jon

Re: design help

Quoted text here. Click to load it
soltion.
Quoted text here. Click to load it

---
You deserve the insults, you arrogant little prick, so fuck you in your
eurotrash ass.

We've slightly trimmed the long signature. Click to see the full one.
Re: design help
On a sunny day (Tue, 24 Feb 2009 14:19:18 -0600) it happened John Fields

Quoted text here. Click to load it
soltion.
Quoted text here. Click to load it

Wow where you gona export to, and what.


Quoted text here. Click to load it

He was asking about how to improve his own thing.
Throwing more of the same to him does not really help him.

And especially not in future projects and more complex solutions he may
want to contemplate.

As far as your insults are concerened, I will stop reading your mentally
disturbed ripples for a while.

Re: design help
On Tue, 24 Feb 2009 22:00:41 GMT, Jan Panteltje

Quoted text here. Click to load it
soltion.
Quoted text here. Click to load it

---
http://www.ers.usda.gov/Data/FATUS /
http://www.nationmaster.com/graph/mil_us_mil_exp-military-us-exports
We've slightly trimmed the long signature. Click to see the full one.
Re: design help

Quoted text here. Click to load it
soltion.
Quoted text here. Click to load it

I didn't see anything like "more of the same". John's circuit is kick-ass,
can be assembled in minutes (OK, maybe 300 or 400 of them ;-) ), and
doesn't need any programming skills or $100.00 development kit.

I just wish John wasn't so foul-mouthed.

Thanks,
Rich


Re: design help
Quoted text here. Click to load it

Didn't mean to start a war but for my problem the solution using the
555 is way simpler.  I don't have any of the pic tools or parts and
while I long ago did 8 bit assembly I'm not really interested in it
anymore.  My delay requirement has no particular precision.  I can
throw the 555 solution together on a breadboard and transfer it to a
board scrape in an evening.

Re: design help
On a sunny day (Tue, 24 Feb 2009 13:56:04 -0600) it happened krw

Quoted text here. Click to load it

I recently gave a link to a PIC that says:
  'Hello I'm Mr Ed' :-)
 http://www.massmind.org/techref/microchip/bigtable.htm

Re: design help

Quoted text here. Click to load it


   Talking out the other end of the horse, no doubt.


--
http://improve-usenet.org/index.html

Goggle Groups, and Web TV users must request to be white listed, or I
We've slightly trimmed the long signature. Click to see the full one.
Re: design help
On a sunny day (Tue, 24 Feb 2009 13:56:04 -0600) it happened krw
Quoted text here. Click to load it

I recently gave a link to a PIC that says: 'Hello I am mister Ed' :-)
 

Re: design help
Quoted text here. Click to load it

Plus $100.00 development kit, and 6 months to learn to program the damn
thing.

Didn't we have a rule here - "No PIC suggestions without full schematic
and source code listing and uploadable object code included" ? ;-)

Cheers!
Rich


Site Timeline