[Mgs] Determine build date for an O/D transmission?

[Charley Robinson]

I drive a Prius which has a "push on, push off" switch.  What the switch 
does is to use the 12 volt battery to boot up the system, then the HV 
battery spins one of the motor/generators to start the engine.  The 
engine doesn't have a starter, you see?

The push on/off approach uses a solid state latching relay in the old 
app of switching high currents with a low current switch.  It boils down 
to a toggled flip-flop and a few AND gates driving a high current 
device.  Nothing new there.  Shoot, a solenoid operated operated 
starting motor is an electromechanical version from days of yore.:-)

Funny thing is the evolution of the switching.  The early cars had a 
starter button.  Then came the spring loaded ignition switch and now 
some are using a starter button again.  Amusing...........

CR

On 11/12/2019 11:19 AM, Max Heim via Mgs wrote:
> As an interface designer, I am puzzled by the “push for on” solution. 
> It seems somehow inappropriate as well as unnecessarily complex.
>
> Overdrive seems to me to be a function where a clear on/off toggle is 
> the natural mode of engagement. Sometimes I want it on, sometimes off, 
> and I want to know which mode it is in.
>
> But then, I think the “start button” on modern cars is idiotic. So YMMV.
>
> --
> Max Heim
> '66 MGB
>
>> On Nov 12, 2019, at 5:43 AM, Charley Robinson <Charley38 at twc.com 
>> <mailto:Charley38 at twc.com>> wrote:
>>
>> I have a neat little module that does as you describe except it has 
>> no warning light.  It is plugged into the wiring between the manual 
>> OD switch and the transmission switches. In the case of my CBB it's 
>> sitting on the shelf on the passenger side of the heater box.  It's 
>> all solid state, has never given me any trouble.   I bought the thing 
>> on line a few years ago but I don't remember the name of the seller.  
>> I absolutely love the thing!
>>
>> CR
>>
>> On 11/12/2019 2:26 AM, PaulHunt73 via Mgs wrote:
>>> 
>>> I got fed up with OD auto-engaging as I changed from 2nd to 3rd so 
>>> built a circuit that once out of an OD gear, it locked it out 
>>> semi-permanently until I turned the manual switch off and back on 
>>> again.  That has a warning light to say it has been locked out, 
>>> rather than one to say it is engaged.  More info 
>>> herehttp://www.mgb-stuff.org.uk/gearstext.htm#sequencer
>>> PaulH.
>>
>>
>
>
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