Sensor Tester - Proximity PNP or NPN

202

02:46:55

Use to test a 24 VDC proximity sensor to determine if it is a PNP or an NPN type

NFG !    When there is no signal - both lamps are lit

The idea is to take the return signal from the sensor (+ or -) depending on PNP or NPN type sensor, and to illuminate the proper indicator

Use the toggle switch to change signal polarity and the push button switch to simulate no signal (nothing detected)

published 8 years ago

genpack

8 years ago

Some clever person would just add a transistor to eliminate your "no signal = both lamps on" issue ?

cdkilo

8 years ago

So that's where I left my zener!

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