Jerry Rigg''in a magnetic pick up coil to a BS2
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Posts: 46,084
In a message dated 9/29/2003 12:46:16 AM Pacific Daylight Time,
djrevolution99@y... writes:
This question is reguarding on how to setup a magnetic pick up coil
(as used on automobile crank pickup sensor's ) in to a opto islotaor
and right into basic stamp 2 input pin.... also how would that be
programed into the chip with what commands and stuff??? i tried
useing the count command but it gave back wierd values .....
any help be apperiacted ...
Sean...
_____________________________________________________
The approach I would start with would be to rectify the output of the crank
sensor. Feed this rectified signal into an op amp comparitor (you will need an
oscope to see what the amplitude of the rectified signal is during cranking
RPM).
The output of the comparitor can feed a simple 2n3904 transistor which in
turn will sink current from the LED side of the opto isolator. The collector of
the opto device, connect 10k to +5 volts, and the collector also goes to the
stamp input pin.
Depending on the max rpm of the motor and number of cylinders will dictate
what commands to use with the stamp. This is assuming the crank sensor is still
being used on an engine.
You can email me off post if you want more specific detailed information.
Leave your phone number and what state you are in. (I am in CA)
[noparse][[/noparse]Non-text portions of this message have been removed]
djrevolution99@y... writes:
This question is reguarding on how to setup a magnetic pick up coil
(as used on automobile crank pickup sensor's ) in to a opto islotaor
and right into basic stamp 2 input pin.... also how would that be
programed into the chip with what commands and stuff??? i tried
useing the count command but it gave back wierd values .....
any help be apperiacted ...
Sean...
_____________________________________________________
The approach I would start with would be to rectify the output of the crank
sensor. Feed this rectified signal into an op amp comparitor (you will need an
oscope to see what the amplitude of the rectified signal is during cranking
RPM).
The output of the comparitor can feed a simple 2n3904 transistor which in
turn will sink current from the LED side of the opto isolator. The collector of
the opto device, connect 10k to +5 volts, and the collector also goes to the
stamp input pin.
Depending on the max rpm of the motor and number of cylinders will dictate
what commands to use with the stamp. This is assuming the crank sensor is still
being used on an engine.
You can email me off post if you want more specific detailed information.
Leave your phone number and what state you are in. (I am in CA)
[noparse][[/noparse]Non-text portions of this message have been removed]