Relay question

Jim Brain brain at
Fri Nov 28 20:37:22 CST 2014

On 11/28/2014 6:26 PM, Chuck Guzis wrote:
> On 11/28/2014 02:40 PM, Mike Stein wrote:
>> Why not just do this the simple, usual way for an application like
>> yours: a pair of nice, sealed, heavy duty industrial pushbuttons marked
>> UP and DOWN, or even a single button with a nice heavy duty toggle
>> switch similarly marked?
>> Personally, I'd be a little leery pushing that button without knowing
>> which way the lift is going to move when I do...
> So really, the sequence of the first 6 pushes of the button are:
> Push 1:    Lift goes up
> Push 2: Lift stops
> Push 3: List goes down
> Push 4: Lift stops
> Push 5: Lift goes up
> Right?
Hehe, no:

Push and Hold #1:  lift goes up
Let go of switch: stops
Push and Hold #2: lift goes down
Let Go of switch: stops

The CLK signal (as it were) length determines how long the motor engages 
in the direction selected.


Jim Brain
brain at

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