Hello,
I’m designing my own minimal PCB. To do this, I’m taking inspiration from the diagram of the AIO v4.5 boards. I’m currently working on the ADS1115 part and I believe there’s a problem with the ADDR pin. Regarding the ADS1115 datasheet, ADDR pin can be connected to GND, VDD, SCL or SDA. On the AIO v4.5 bord, this pin is connected to nothing. Floating input pin is generaly a bad idea in electronic design.
So what is the correct connexion for this pin ? I presume it’s to GND (0x48) but i prefer cofirmation.
thank you
You need 5 pins, Vdd, Gnd, Scl, Sda, and one of the analog inputs.
When fitting cathcode led’s, which way round do they go in the board?
Either way it will work. It just changes which color they will light for which function.
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The LED common cathode goes to the middle of the three holes.
I have to solder the bi color LEDs on my boards when they turn up. Looking for a substitute LED, the center pin is typically common cathode, but red and green pins can vary with different makes and models. I’ll solder one and check it to make sure I have the colours the right way around before soldering the rest.
I was going to try them before fitting, but I don’t know which way the board is made, if I knew what the square hole should be colour wise then I could work from there.
Having some difficulties with find replacement parts. I’ve got 3 items that are out of stock, any suggestions?
Often times if you just hit the search glass it will have multiple version of the same item that will show in a list. Possibly just a different manufacture but is the same. Often it will have a picture of the item that was selected and there will probably be another with a similar description and the same number of pins and size that is available. It will show in the list the number of items available for the alternative parts and you just pick one that is actually in stock.