jecottrell
New member
Just want to confirm prior to releasing a board for prototyping that what I'm attempting is correct.
On the CFAH1602B-YYH-JPV module:
Pin 16 is not implemented? (If you look at the top of the module board there is a trace leading from it, to something under the LCD module.) So, is it really connected to K or not? Data sheet says N/C. Meter says it's not also.
Pin 15 is the Vee. Vo goes to the wiper on the contrast pot and Vdd and Vee go to other connections on the pot. I've got additional pads for series resistors on each leg of the contrast pot. They will be used to make the pot most effective in adjusting the contrast. (i.e. if the contrast only gets adjusted between 5K and 7K on the 10K pot, I'll use a 2K pot and trimmer resistors on the legs.... make sense?) So the question is, where is the 'meat' of the contrast adjustment occuring in a 10K pot?
A and K for the backlight need to be added (i.e. aren't pinned out on the 1x16 SIP connection.) K can be jumped to Vss on the module, but A needs to brought off the board and current limited w/ a series resistor. Are any of the open 0805 pads on the back of the module made for doing any of this?
Thanks a bunch,
John
On the CFAH1602B-YYH-JPV module:
Pin 16 is not implemented? (If you look at the top of the module board there is a trace leading from it, to something under the LCD module.) So, is it really connected to K or not? Data sheet says N/C. Meter says it's not also.
Pin 15 is the Vee. Vo goes to the wiper on the contrast pot and Vdd and Vee go to other connections on the pot. I've got additional pads for series resistors on each leg of the contrast pot. They will be used to make the pot most effective in adjusting the contrast. (i.e. if the contrast only gets adjusted between 5K and 7K on the 10K pot, I'll use a 2K pot and trimmer resistors on the legs.... make sense?) So the question is, where is the 'meat' of the contrast adjustment occuring in a 10K pot?
A and K for the backlight need to be added (i.e. aren't pinned out on the 1x16 SIP connection.) K can be jumped to Vss on the module, but A needs to brought off the board and current limited w/ a series resistor. Are any of the open 0805 pads on the back of the module made for doing any of this?
Thanks a bunch,
John
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