Re: Simple design - will it work


"petrus bitbyter" <pieterkraltlaatditweg@xxxxxxxxxxxxxxxxx> schreef in
bericht news:4a54a500$0$931$e4fe514c@xxxxxxxxxxxxxxxxxxxxxxxxxxx

"Jim" <jim@xxxxxxx> schreef in bericht
news:4a548a82$0$25006$ed362ca5@xxxxxxxxxxxxxxxxxxxxxxxxx
Guys

I need to wire up a remote switch for a milling machine in my garage.

Rather than go into a lot of detail all I need to achieve is continuity
betwenn A & B on the linked diagram but I can only use a momentary switch
(SW1)

http://rapidshare.com/files/253373634/2443_001.pdf

Can someone confirm if the planned circuit will work ie when SW1 is
momentarilly closed then continuity will provided aacross A&B until the
12V
power is switched off.


Also on a different topic, I need to connect a 10k pot to my inverter to
vary the power output. Circuit diagram shows 3 connections,

1) +10V (Power terminal of Pot)
2) Analog frequency signal input terminal
3) 0VAnalog common point

Any idea how I identify which pin is which on my pot

Cheers

Jim




This circuit will not do what you want it to do. AB will be connected as
long as you keep the momentary switch pushed but will disconnect when you
release that switch almost immediately. To achieve your goal you need a
DPST relay as shown below. (View with fixed font.)


--+--------------------12V
|
|
| +-----+
| | | +---- A
| | | |
| | \ o \ o
X_|_ | \ x1 \ x2
|_/_|- | \. \.
| | o o
| | | |
+-----+ | +---- B
| |
| |
| o |
|=|> |
| o |
| |
| |
| |
-+-----------+----------- -
created by Andy´s ASCII-Circuit v1.24.140803 Beta www.tech-chat.de

If you have the two SPDT relay as in your drawing already available, you
can use them by switching the coils in parallel.


--+------+--------------------12V
| |
| |
| | +-----+
| | | | +---- A
| | | | | | |
| | | o\ o o\ o
X_|_ Y_|_ | \ x \ y
|_/_|- |_/_|- | \. \.
| | | o o
| | | | |
+------+-----+ | +---- B
| |
| |
| o |
|=|> |
| o |
| |
| |
-+------------------+-------------
created by Andy´s ASCII-Circuit v1.24.140803 Beta www.tech-chat.de

As for your pot, you'd connect the pin in the middle to connection 2. The
1 and 3 connection come on both outside pins. You can exchange when
required.

petrus bitbyter



Rectification: The schematic of the OP will work the same way the second
schematic above does. It's drawn in a (to me) unusual way but electrically
the same except that +12V and GND are exchanged.

petrus bitbyter


.

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