New Build, Aluminium Frame Router/Mill

**Davek0974** · 13-03-2016

Originally Posted by Clive S

I don't think it is right to condemn the switches and say they don't work for combined use. Lots of people use them it all depends how they are wired. NPN and PNP are different and have to be wired different.

I didn't mean "these" as in all sensors, just maybe these super cheap eBay ones possibly, they were only £2.50ea. Previous experience was that the LED & output was either ON or OFF, not flickering depending on how close the target is.

**Clive S** · 13-03-2016

Originally Posted by Davek0974

I didn't mean "these" as in all sensors, just maybe these super cheap eBay ones possibly, they were only £2.50ea. Previous experience was that the LED & output was either ON or OFF, not flickering depending on how close the target is.

You got robbed you can buy them for about £1.30 on ebay. I think you might be correct with the pull ups in that case I think you will need PNP sensors. But that doesn't mean they are crap.