28 Nov
2014
28 Nov
'14
10:49 p.m.
On 11/28/2014 4:09 PM, Peter Coghlan wrote:
I have come across a relay like this controlling the
door of a bus.
One push to make switch, push once to open, push once to close. The
bus schematics called it an "impulse relay". This is East of the
Atlantic - who knows if they they call it the same thing where you
are. The one I came across was 24V rather that 12V too. (There were no
classic computer systems on the bus, unless you count the radio system
which allegedly tracked the bus location and radioed it back to the
controller. It counted pulses from the speedometer/odometer
tachogenerator and did 4 bit BCD arithmatic on them using 4000 series
CMOS.) Regards, Peter Coghlan.
I'll see if that set of words helps me. Google
was not all that useful
last night.
I'd like to find something and get it here within the week, as they are
coming back, and I'm hoping to test it out before I give it to him to
install in the unit.
Jim
--
Jim Brain
brain at jbrain.com
www.jbrain.com