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Need help with intermittent circuit failures - JK Flip Flops

J

Jason S

John Fields said:
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Good!, that's how it's supposed to work. :)

The reason the relay switches over when the motor stops is because
there's no reason for it not to and it saves a timer.

Think about it... once power to the motor is cut off, all you need
is the delay for the motor to stop turning before you supply power
to the motor again, so when the direction-reversing relay switches
over is immaterial.

If you need some extra time before power is again applied to the
motor just adjust R10.



=) Ok, fair enough (sorry, it's just that this wasn't explained to me).
That delay was there before and now it isn't - which is why I got a little
concerned. But yes it works ... and nothing is overheating, yay!

I've been playing around with it, bit of a hiccup found (God, please let
this be the last one so I can leave John in peace! lol). And again, I am
unsure if you intentionally made it do this, so forgive me if it's not
actually a fault! **If neither of the reed switches are closed at Power On,
the motor won't start (the LED is off too). But if one of the reed switches
are closed and then power is applied to the circuit, it works fine. What's
the go with that?

Jason.
 
J

John Fields

=) Ok, fair enough (sorry, it's just that this wasn't explained to me).
That delay was there before and now it isn't - which is why I got a little
concerned. But yes it works ... and nothing is overheating, yay!

I've been playing around with it, bit of a hiccup found (God, please let
this be the last one so I can leave John in peace! lol).
 
J

Jason S

Hi John,
Tried that. No luck :-(
I used a 0.1uF like you said, but a greencap... that ok? Tried both U1-2
and U1-6 (two separate caps) as well, no good. It seems to be very
intermittent too... like 1 in maybe 10 shots the motor would start.

Jason
 
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