Auto Turn ON and OFF
Auto Turn ON and OFF
(OP)
Hello everybody
I need to develop a ohmmeter with a auto power ON/OFF when I do apply a resistance(between 0ohm and 2ko) on the circuit ... My problem is how can I do that ? I need to detect the continuity to turn ON the circuit (I gonna use a PIC 12F615) but can not modify the signal to be able to use it on the analog input of the PIC
Thank you very much for the help
I need to develop a ohmmeter with a auto power ON/OFF when I do apply a resistance(between 0ohm and 2ko) on the circuit ... My problem is how can I do that ? I need to detect the continuity to turn ON the circuit (I gonna use a PIC 12F615) but can not modify the signal to be able to use it on the analog input of the PIC
Thank you very much for the help





RE: Auto Turn ON and OFF
Dan - Owner

http://www.Hi-TecDesigns.com
RE: Auto Turn ON and OFF
RE: Auto Turn ON and OFF
RE: Auto Turn ON and OFF
RE: Auto Turn ON and OFF
When a low ohm circuit is connected, the voltage drops below 1.5 V (probable threshold for the input pin). Once that condition has been detected, shut off the output pin and start measuring. When measured resistance gets above your measurement range, just go back to state 1.
Gunnar Englund
www.gke.org
--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.
RE: Auto Turn ON and OFF
Dan - Owner

http://www.Hi-TecDesigns.com
RE: Auto Turn ON and OFF
This has "intrinsically safe" written all over it.
It's not exactly the same as that applied for use in potentially explosive atmospheres, but it's along the same lines.