Re: Need help with intermittent circuit failures - JK Flip Flops

On Mon, 12 Jun 2006 15:49:12 +1000, "Jason S"
<jst3712@xxxxxxxxxxxxxx> wrote:

I've noticed a potential problem though!!! You know how this thing pans 180
degrees and then changes direction shortly after the reed switch is
magnetized? This thing would break on me if it was left the way it is (not
the circuit, but the outer structure because it's not designed to spin
beyond 180 degrees).

- I'll give you an example:
Imagine the motor is turning in Direction "A", and the reed switch just made
contact with the magnet. Then I shut down the whole circuit intentionally
(at this stage, it has already panned 180 degrees, which is the max). If
you then turn the circuit back on, *sometimes* the motor starts to spin in
the same direction (A) it was before - when it should be turning the
opposite direction (B) straight away. So somehow the circuit will need to
know that it reached the end from the previous time and should be turning in
the correct direction. I'm not sure how this will need to be hooked up, but
maybe a second reed switch is needed (one for each direction)???

---
Yes.
---

Other than that it seems to be working fine. I can't wait to see your next
version John.... no 555!

---
It's down to a single HC02, and it's posted on abse _with_ the two
switch mod. :-)


--
John Fields
Professional Circuit Designer
.

Relevant Pages

  • Re: Need help with intermittent circuit failures - JK Flip Flops
    ... Imagine the motor is turning in Direction "A", and the reed switch just ... contact with the magnet. ... Then I shut down the whole circuit intentionally ...
    (sci.electronics.basics)
  • Weird Weather Monitor 2 raingauge
    ... Anyway I checked out how to replace the reed switch and found a good little ... AFter the first repair the gauge was under-reading against my 5 inch gauge, ... The purpose of the magnet is to pull the connections inside the reed switch ... apart after each tip so the circuit is broken again. ...
    (uk.sci.weather)
  • Re: Need help with intermittent circuit failures - JK Flip Flops
    ... Same thing for the power ON-OFF to the motor. ... Professional Circuit Designer ... Imagine the motor is turning in Direction "A", and the reed switch just made ...
    (sci.electronics.basics)
  • Re: Need help with intermittent circuit failures - JK Flip Flops
    ... Imagine the motor is turning in Direction "A", and the reed switch just ... Then I shut down the whole circuit intentionally ...
    (sci.electronics.basics)
  • Re: motion detector?
    ... reed switch makes much more sense then the coil idea. ... The reed switch will work nicely with the circuit I posted for you on ... Professional Circuit Designer ... Prev by Date: ...
    (sci.electronics.basics)