Components for HAI boards..

[dwalt]

Does anyone on the forum have any old chips stashed away for projects?
Looking for 74HC4051N, 74HC595N, LM331N, LM34. These are for the 16 zone expander and temp sensor boards...
Buying on ebay is a crap shoot since many Chinese vendors sell fake chips...
@dwalt

 

[tigers]

Sorry, cant help you even if they seem quite common chips. I was looking for what chip the temperature sensors use, I assume it’s the LM34 then?

 

[cornutt]

The Texas Instruments CD74HC4051E is a direct replacement and is in stock at Digi-Key:

https://www.digikey.com/en/products/detail/texas-instruments/CD74HC4051E/475938

If you go to either Digi-Key or Mouser and type the part numbers into the search box, they may be able to find substitutes for the other parts.