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Re: 1 if low pressure 0 if high pressure
Posted by Adrian Wong at 03/12/2001 10:00 PM EST
Student on team #596, Hopkinton Hillers, from Hopkinton High School and Zymark & Computer Associates. In Reply to: 1 if low pressure 0 if high pressure Posted by Joe Johnson on 03/12/2001 9:35 PM EST: : As I recall, the switch provides the PBASIC with a 1 : when below XXX psi and turns to a 0 when above that : psi. There is a slight hysterisis (spelling?) which : means that it turns off at say 110 psi but then does : not turn on again until it gets below 105 psi. In many : cases this is a very anoying feature, but in this case, : it is nice because the pump not sit and cycle off-on : at the make-break point. Ah, this is exactly what I am talking about. Thanks! (Hysteresis, that was the word I was looking for to describe it.) Thanks again! (Note: Finally resolved the PBASIC code for triggering the air compressor to the following that uses an XOR logic to provide the operator with an override in case you'd want to conserve power when the compressor is on or need extra pressure for some odd reason -> relay3_fwd = rc_sw2 ^ p1_sw_top) |
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