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THE WITZL Forums Junkie Toymods Social Secretary Location: Sydney Registered: July 2002	Re: Converting 4A to Hall Effect Tue, 12 April 2005 22:15 agbe, according to the allegro microsystems datasheet which the Jaycar website has uploaded for the ULN3503U (http://www1.jaycar.com.au/products_uploaded/ZD1902 .pdf) the flat response is to 23kHz.... I am the one who buys these for Jaycar/Electus, and i dont remember buying the allegro brand at any stage.... FWIW, there is another hall effect sensor which is a copy of the old Siemens device which MILLIONS of people used to use in their dissys to make a strong electronic signal. (someone linked above)... i will either be using something like this or a notch wheel on my crank on the 18RGTE. Sideshow. You are half correct with your thoughts that the Haltech is the one with the problem. Im my experience a fair few aftermarket ECUs (mainly the older and cheaper ones) have problems sensing the very low signal given by the toyota electronic dissys in their internal ignitors. Their ignitors are designed for a nice fat 5V signal, so when they get this little AC pulse of around 300mV or less, they dont like it and have to amplify it... so when electric noise is increased (as heated wires tend to do) the internal ignitors dont see the signal... [Report message to a moderator]

	Subject	Poster	Date
	Converting 4A to Hall Effect	takai	Tue, 12 April 2005 08:03
	Re: Converting 4A to Hall Effect	barned01	Tue, 12 April 2005 08:24
	Re: Converting 4A to Hall Effect	takai	Tue, 12 April 2005 08:29
	Re: Converting 4A to Hall Effect	oldcorollas	Tue, 12 April 2005 12:43
	Re: Converting 4A to Hall Effect	takai	Tue, 12 April 2005 12:47
	Re: Converting 4A to Hall Effect	takai	Tue, 12 April 2005 08:34
	Re: Converting 4A to Hall Effect	towe_001	Tue, 12 April 2005 08:49
	Re: Converting 4A to Hall Effect	gearb0x	Tue, 12 April 2005 10:50
	Re: Converting 4A to Hall Effect	shinybluesteel	Tue, 12 April 2005 12:05
	Re: Converting 4A to Hall Effect	takai	Tue, 12 April 2005 12:14
	Re: Converting 4A to Hall Effect	improvedae86	Tue, 12 April 2005 12:15
	Re: Converting 4A to Hall Effect	takai	Tue, 12 April 2005 12:17
	Re: Converting 4A to Hall Effect	sideshow	Tue, 12 April 2005 12:17
	Re: Converting 4A to Hall Effect	takai	Tue, 12 April 2005 12:20
	Re: Converting 4A to Hall Effect	shinybluesteel	Tue, 12 April 2005 12:33
	Re: Converting 4A to Hall Effect	gabe	Tue, 12 April 2005 12:49
	Re: Converting 4A to Hall Effect	sideshow	Tue, 12 April 2005 12:41
	Re: Converting 4A to Hall Effect	THE WITZL	Tue, 12 April 2005 22:15
	Re: Converting 4A to Hall Effect	Ben Wilson	Tue, 12 April 2005 22:23
	Re: Converting 4A to Hall Effect	takai	Tue, 12 April 2005 22:28
	Re: Converting 4A to Hall Effect	THE WITZL	Tue, 12 April 2005 23:51
	Re: Converting 4A to Hall Effect	takai	Wed, 13 April 2005 08:00
	Re: Converting 4A to Hall Effect	sideshow	Wed, 13 April 2005 08:57
	Re: Converting 4A to Hall Effect	EVOSTi	Wed, 13 April 2005 11:01
	Re: Converting 4A to Hall Effect	takai	Wed, 13 April 2005 11:23
	Re: Converting 4A to Hall Effect	EVOSTi	Wed, 13 April 2005 11:34
	Re: Converting 4A to Hall Effect	EVOSTi	Thu, 14 April 2005 07:19
	Re: Converting 4A to Hall Effect	takai	Thu, 14 April 2005 08:38
	Re: Converting 4A to Hall Effect	EVOSTi	Fri, 15 April 2005 06:26
	Re: Converting 4A to Hall Effect	takai	Fri, 15 April 2005 12:40
	Re: Converting 4A to Hall Effect	NickZ	Sat, 16 April 2005 10:43
	Re: Converting 4A to Hall Effect	takai	Sat, 16 April 2005 12:55
	Re: Converting 4A to Hall Effect	M.W.P.	Sat, 16 April 2005 13:52

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