- The deadline has been extended to a shaky by next Monday.
- I am using a 16 by 2 character LCD instead of the 7-segment displays to keep the hardware simple.
- I had done pretty much no work on the calculator since Wednesday.
After furious work on Wednesday and Thursday, I had all of the hardware finished. I was about to test the calculator when I realized I didn't know what the LCD pinout was. And then it hit me. Here I was, with a 3 volt MCU, trying to hook up a 5-VOLT LCD! Anyways, I tested the LCD out, and it did not work at 3 volts. I ordered another, 3-volt lcd from Sparkfun late Thursday night, and it didn't come until today. With the LCD soldered now, I tried to test it out, but the backlight of the LCD would not turn on, and the voltage regulator grew hot. Although there are no obvious shorts, the resistance of Vcc to Ground is apparently 4000 ohms. Even that shouldn't have stressed out the regulator, though. Maybe I just inserted it backwards. I am done for tonight, though, and tomorrow being my 14th birthday, I doubt much work will happen until this Wednesday.
No comments:
Post a Comment