I just soldered a ds2438 to a little bread broad adapter - everything looks ok but when testing with a little one wire address finder it does not return any device.
https://www.hacktronics.com/Tutorials/arduino-1-wire-address-finder.html
I have only 3 wires connected.
But either I have killed the DS2438 or some other issue.
Any thoughts?
Your photo doesn't have enough resolution to read the labels on the small PCB so it is hard to see. Also the wires are so tangled you can't tell where they go one the Arduino.
But it looks to me that you have no ground connected to the board.
Where is the pull up resistor for the 1 wire bus. At 5V something in the 4.7K range should work just fine. If that does not solve it test with a known good device.
Can you let me know exactly how to wire that up please?
4.7K between what and what?
Chris
Only if you give the link to where you bought the board from.
It could be on the board already.
Place a 4k7 resistor between pins 8 and 5 of the
DS2438.
https://www.aliexpress.com/item/1005005031283841.html
Board is bare.
Thanks I will try this today.
Chris
Yes, so you should know how you wired it up. Where is the ground connected to?
I soldered another unit up and it is now working 100%
I am not sure if I killed the original ds2438 some how but I soldered it better the first time than the second time.
Thanks for your help
Chris
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