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ed_ma61 Forums Junkie Location: Lost in the K hole Registered: May 2002	Re: Knock Sensor Circuit Design ... Wed, 30 July 2003 11:48 UPDATE ok i built the circuit, and the sucker works (thanks shane! ) hehehe BUT at the moment, it takes a HEFTY whack with a ballpein hammer on the deck of the block (on the cyl above where the sensor is mounted) to get the thing to trigger. i have no idea how powerful a shock detonation puts through the block, but i suspect at the moment the circuit isnt sensitive enough, so im going to swap the 1N914 diode (0.571v forward bias) for a germanium diode (lower forward bias volatge) and hopefully capture things at a lower threshold (0.45v or so?) i might put the two diodes on a rotary switch so i flip between the two as i figure how this thing works. anyway, its looking 'not bad' as a basic indicator of what the sensor is hearing... cheers ed [Report message to a moderator]

	Subject	Poster	Date
	Knock Sensor Circuit Design ...	ed_ma61	Tue, 22 July 2003 04:50
	Re: Knock Sensor Circuit Design ...	Cool1	Tue, 22 July 2003 05:41
	Re: Knock Sensor Circuit Design ...	ed_ma61	Tue, 22 July 2003 05:45
	Re: Knock Sensor Circuit Design ...	roger	Tue, 22 July 2003 05:46
	Re: Knock Sensor Circuit Design ...	ed_ma61	Tue, 22 July 2003 05:52
	Re: Knock Sensor Circuit Design ...	oldcorollas	Tue, 22 July 2003 05:58
	Re: Knock Sensor Circuit Design ...	ed_ma61	Tue, 22 July 2003 06:10
	Re: Knock Sensor Circuit Design ...	sideshow	Tue, 22 July 2003 06:13
	Re: Knock Sensor Circuit Design ...	ed_ma61	Tue, 22 July 2003 06:26
	Re: Knock Sensor Circuit Design ...	Cool1	Tue, 22 July 2003 06:39
	Re: Knock Sensor Circuit Design ...	ed_ma61	Tue, 22 July 2003 06:52
	Re: Knock Sensor Circuit Design ...	ed_ma61	Tue, 22 July 2003 06:58
	Re: Knock Sensor Circuit Design ...	Cool1	Tue, 22 July 2003 07:03
	Re: Knock Sensor Circuit Design ...	ed_ma61	Tue, 22 July 2003 07:08
	Re: Knock Sensor Circuit Design ...	oldcorollas	Tue, 22 July 2003 08:10
	Re: Knock Sensor Circuit Design ...	ed_ma61	Tue, 22 July 2003 10:01
	Re: Knock Sensor Circuit Design ...	Cool1	Tue, 22 July 2003 09:00
	Re: Knock Sensor Circuit Design ...	Cool1	Tue, 22 July 2003 07:01
	Re: Knock Sensor Circuit Design ...	sideshow	Tue, 22 July 2003 12:14
	Re: Knock Sensor Circuit Design ...	ed_ma61	Tue, 22 July 2003 12:37
	Re: Knock Sensor Circuit Design ...	Allan	Tue, 22 July 2003 12:41
	Re: Knock Sensor Circuit Design ...	ed_ma61	Tue, 22 July 2003 12:55
	Re: Knock Sensor Circuit Design ...	sideshow	Tue, 22 July 2003 12:43
	Re: Knock Sensor Circuit Design ...	ed_ma61	Tue, 22 July 2003 13:02
	Re: Knock Sensor Circuit Design ...	Allan	Tue, 22 July 2003 13:12
	Re: Knock Sensor Circuit Design ...	ed_ma61	Tue, 22 July 2003 13:26
	Re: Knock Sensor Circuit Design ...	ed_ma61	Tue, 22 July 2003 14:26
	Re: Knock Sensor Circuit Design ...	humble	Tue, 22 July 2003 17:22
	Re: Knock Sensor Circuit Design ...	ed_ma61	Wed, 23 July 2003 00:17
	Re: Knock Sensor Circuit Design ...	Norbie	Wed, 23 July 2003 00:14
	Re: Knock Sensor Circuit Design ...	Allan	Wed, 23 July 2003 02:19
	Re: Knock Sensor Circuit Design ...	ed_ma61	Wed, 23 July 2003 03:02
	Re: Knock Sensor Circuit Design ...	E30-323ti	Wed, 23 July 2003 03:11
	Re: Knock Sensor Circuit Design ...	ed_ma61	Wed, 23 July 2003 03:20
	Re: Knock Sensor Circuit Design ...	E30-323ti	Wed, 23 July 2003 03:34
	Re: Knock Sensor Circuit Design ...	ed_ma61	Wed, 23 July 2003 03:40
	Re: Knock Sensor Circuit Design ...	ed_ma61	Wed, 30 July 2003 11:48
	Re: Knock Sensor Circuit Design ...	-Mark-	Wed, 30 July 2003 13:22

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