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Character LCDs / NHD-C0216CZ-NSW-BBW-3V3 Voltage booster Capacitor Voltage
« on: October 01, 2014, 08:54:46 PM »
The spec sheet for NHD-C0216CZ-NSW-BBW-3V3 shows two capacitors required but does not mention what voltage these should be. I see two are part of the Voltage Booster circuit but there is no mention of what voltage is going to appear on these pins. I expect it will be greater that 3.3V but just how much greater?
Also on the capacitor, is "0.47uF‐2.2uF" arbitrary, anything will do, or are there design parameters that will affect the value used?
The spec sheet does not explain how contrast is altered but I see from other posts that this might be by software. That is clever, but new to me. I think this detail should be included on the specs. There is a "Contrast Set" mentioned in the "Instruction Table 1 (IS=1)" with four bits and a note about follower mode
. Not much use. Also "Call writecom(0x70);" in the Example. A referral to the Controller Information link for Contrast would be good.
I hope I can use this display upside down and expect I will find that info somewhere in the controller sheet.
Thankyou in advance for comments on these issues.
Also on the capacitor, is "0.47uF‐2.2uF" arbitrary, anything will do, or are there design parameters that will affect the value used?
The spec sheet does not explain how contrast is altered but I see from other posts that this might be by software. That is clever, but new to me. I think this detail should be included on the specs. There is a "Contrast Set" mentioned in the "Instruction Table 1 (IS=1)" with four bits and a note about follower mode
. Not much use. Also "Call writecom(0x70);" in the Example. A referral to the Controller Information link for Contrast would be good. I hope I can use this display upside down and expect I will find that info somewhere in the controller sheet.
Thankyou in advance for comments on these issues.