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Cool. I don't have a TL431. Should order some in my next order because I keep running into this problem. I'll do it with resistors for now. Nearest resistors I have to 247Use a TL431, else it needs to be about 250ohms impedance. So a pair of 247ohm resistors would do the trick.
OK, here's where my electronics ignorance shows.It's in the 18F1320 datasheet, the A/D actually sinks and sources the VREF+ pin. A cap should stop that.
Oh ya, Bill, your blog here won't allow me to post a comment. I was going to say (in re: your Lab-Easy comment) that DipMicro is liquidating Lab-Easy products. Poor sales? Promo? Guess I should buy some while it's cheap...