Advanced relay?

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KPierson

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This member consistently provides reliable information

Joined: April 14, 2005

Location: Ohio, United States

Posted: August 11, 2006 at 7:33 AM / IP Logged

You need the other one as well to make sure that the input is fully 'off' when no signal is applied. So, two 10K resistors and you should be set.

You can add a few more resistors for protection (limit current) but they aren't absolutely necesarry.

Kevin Pierson

debeerd

Member - Posts: 30

Joined: March 22, 2006

Location: South Africa

Posted: August 11, 2006 at 10:49 AM / IP Logged

I made it like the last diagram, without the resistor over G & S.

It works without the earth wire ??

debeerd

Member - Posts: 30

Joined: March 22, 2006

Location: South Africa

Posted: August 14, 2006 at 3:41 PM / IP Logged

This works on my Opel Corsa, but not on an Opel Kadett ??

My coil is positive triggered and the Kadett is negative trigger, could this be the problem ??

KPierson

Platinum - Posts: 3,527

Joined: April 14, 2005

Location: Ohio, United States

Posted: August 14, 2006 at 4:35 PM / IP Logged

Without an o'scope it would be hard to figure out exactly what the problem is.

Kevin Pierson

debeerd

Member - Posts: 30

Joined: March 22, 2006

Location: South Africa

Posted: September 02, 2006 at 5:02 AM / IP Logged

Can this circuit be made to give a negative pulse or positive pulse ?

KPierson

Platinum - Posts: 3,527

Joined: April 14, 2005

Location: Ohio, United States

Posted: September 02, 2006 at 9:25 AM / IP Logged

You can output either one, based on the type of transistor you use. An N channel will give you a (-) pulse, a P channel will give you a (+) pulse. Of course you'll have to wire the P channel up slightly differently to get the (+) pulse, but you'll basically just switch the grounds with the positives.

Kevin Pierson

debeerd

Member - Posts: 30

Joined: March 22, 2006

Location: South Africa

Posted: September 02, 2006 at 3:44 PM / IP Logged

How would I know if it is a N or P ?

KPierson

Platinum - Posts: 3,527

Joined: April 14, 2005

Location: Ohio, United States

Posted: September 02, 2006 at 4:07 PM / IP Logged

By the part number of the device.

Kevin Pierson

debeerd

Member - Posts: 30

Joined: March 22, 2006

Location: South Africa

Posted: September 03, 2006 at 3:46 AM / IP Logged

All it says is IRFP460 445XD

KPierson

Platinum - Posts: 3,527

Joined: April 14, 2005

Location: Ohio, United States

Posted: September 03, 2006 at 9:54 AM / IP Logged

Google says:

500V Single N-Channel HEXFET Power MOSFET

Kevin Pierson

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