- Joined
- Nov 28, 2011
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- 8,393
Looks good to me Andy.
One thing I guess I missed was that the relay is energized when the floats are open, and de-energized on low fuel.
It doesn't matter which way it is designed, as long as my dumb ass understands WHICH way!Just as a matter of principle I would normally have the relay energised to allow the engine to run. You seemed to be pretty clear that you wanted it the other way, which shouldn't be a problem either, and does save a bit of power while it's running I guess.
I am using the transistor circuit in post #20, and it can stay as-is. Buuut... now I am a little bit confused. In the schematic in post #20, is the relay coil:Do you want to change the circuit so the output relay is normally energised? Are you using the 555 design or the two-transistor circuit? I've lost track. The 555 design can easily be changed to do this; the transistor one will need at least one more transistor
Are you using the 555 design or the two-transistor circuit? I've lost track.
I am using the transistor circuit in post #20, and it can stay as-is. Buuut... now I am a little bit confused. In the schematic in post #20, is the relay coil:
- Always energized, then de-energizes when fuel runs low
- Not energized at all until fuel runs low?
... Guess what? The two MPSA14 transistors were installed.... SDRAWKCAB!
Yup, I had the collector and emitter leads reversed on both of them... flipped them around, and TA-DA! Works like a champ!
Andy