3 ms·
strange use for a microswitch, must've had access to dirt cheap switches; IR diodes tend to be cheaper and less faulty for that kind of use. all the microfluid
by serf 5y ago
strange use for a microswitch, must've had access to dirt cheap switches; IR diodes tend to be cheaper and less faulty for that kind of use.
all the microfluidic/lab-on-a-chip stuff is neat, i'm thankful that someone decided to tear something like this apart and show us.
- jmole 5y agomicroswitches are like $0.05 or less in large quantities, I don't think you can find an LED/phototransistor pair cheaper than that.
- sokoloff 5y agoUnder $0.02 @2K: https://lcsc.com/mobile/product-detail/Phototransistors_XINGLIGHT-XL-1608PDC_C965887.html https://lcsc.com/mobile/product-detail/Phototransistors_XING... Plenty more as well and no shortage of LEDs at $0.01ea @ 2K.