Jaycar Knock Sensor Re: Injector Duty Cycle

[Don.F.Broadus at ucm.com]

I 'am working on reverse engineering a  ESC (electronic spark controller)
from a 1984  Chevy truck.  The controllers
Only input is from the detonation sensor. The output is to the 7 terminal
module in the HEI. The HEI has mechanical and VAC advance.  There are (2)
24 pin IC's on the board 26500 and 26327 and lots of resistors and
capacitors. Once the
Board is figured out I'm sure it could be tuned for specific frequencies.
This is an early version of the black sealed module.
Any help on chip ID would be appreciated
 
Thanks 
 
Don
 
  







-----Original Message-----
	From:	Rene Van Den Bedem [SMTP:rene.van.den.bedem at fujitsu.com.au]
	Sent:	Sunday, October 18, 1998 7:10 PM
	To:	diy_efi at efi332.eng.ohio-state.edu
	Subject:	Jaycar Knock Sensor Re: Injector Duty Cycle


	I installed the Jaycar Knock Sensor on my car.  The circuit is
basically an
	amplifier, hi-pass filter, low-pass filter, Schotcky diode to coil,
buzzer
	& LED level meter.

	The knock sensor element is either home-made ( bit of metal with
piezo
	element out of Ear Piece and coax connected to it) or  commercial
unit from
	Wrecker.

	I found the Kit version to be OK, it worked first go (and so it
should
	since the electronics are very simple).  However the sensitivity
range was
	too coarse (trimpot).

	However, I disconnected the buzzer straight off.  It drove me crazy
while I
	was nutting out the sensitivity issue.

	Jaycar still produce this kit, Engine Knock Sensor (KC-5203)
AUD$34.95 

	Jaycar Electronics
	Head Office
	8-10 Leeds Street, Rhodes, NSW 2138, Australia
	PO Box 185, Concorde, NSW 2137, Australia
	Telephone: +61 2 9743 5222
	Facsimile: +61 2 9743 2066
	Mail Order Hotline: +61 2 9743 6144
	Mail Order - Order Line: 1800 022 888 (within Australia)
	Wholesale Orders: 1800 620 169 (within Australia)
	Wholesale Facsimile: +61 2 9743 3070
	Delivery Charges:
	Mail Post: Max AUD$8.00
	Overseas Airmail: AUD$8.00 up to 500g, thereafter AUD$19 first kilo
&
	AUD$6/kg onwards
	Road Freight: AUD$14 anywhere within Australia, up to 20KG
	Overnight Jet Airfreight: AUD$10 max 3KG, AUD$16 max 5KG


	At 08:44 19-10-98 +1100, you wrote:
	>Hi Simon,
	>	You mentioned the Knock Display. I purchased a kit from
Altronics in
	>Sydney. Built it but never got it to work. Have you or anyone built
a
	>knock sensor and had any success with one.
	>Cheers Richard.
	>
	>Simon Quested wrote:
	>> 
	>> > -----Original Message-----
	>> > From: Simon Quested <questeds at whio.lincoln.ac.nz>
	>> > To: diy_efi at efi332.eng.ohio-state.edu
<diy_efi at efi332.eng.ohio-state.edu>
	>> > Date: Wednesday, October 14, 1998 11:34 PM Subject: Re:
Injector Duty
	>> > Cycle
	>> >
	>> >
	>> > Hi All
	>> >
	>> > I saw a jaycar kit for about US$30 that displays duty cycle
while
	>> > you drive.
	>> >
	>> > Jaycar is an aussie kit/electronics supplier.
	>> >
	>> > My catalog doesn't show one.
	>> 
	>> Neither does mine. I don't know if it is still being produced but
there
	>> are 2 kits at south island components. I think jaycar has stopped
	>> producing the knock sensor display as well.
	>> 
	>> > If I sent ya funds would ya send me one?.
	>> 
	>> No problem !
	>> 
	>> Cheers
	>> 
	>> Simon
	>> +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
	>>   Simon Quested (E-mail questeds at lincoln.ac.nz)
	>>   Computer Enginner, Silicon Graphics & Windows NT Support
	>>   Computing and Educational Resources
	>>   LINCOLN UNIVERSITY OF NEW ZEALAND
	>>   Phone (64)(03) 3252811 Ext. 8087
	>> +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
	>> http://www.lincoln.ac.nz/ccb/techs/simon/default.htm
	>> +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
	>> Atheism is a nonprophet organisation.
	>> +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
	>
	>
	>