| ??? 12/02/04 19:58 Read: times |
#82421 - Help! Responding to: ???'s previous message |
Andy Said?
"Draw the diagram; think how the "output" voltage from the divider (that you measure with your ADC) is related to the "input" voltage to the divider. You also need to think about how the range of ADC digital output values relates to the range of analogue input voltage values to the ADC." Andy, this is though, but I know I can do it with a little bit of your help. I have a divider already done: (6.49K/(6.49k + 20K)) * 12V = 2.94Volts which is the voltage going into the ADC. The user's manual says that using the ADC the pin will be 3V tolerant only. The highest voltage I will have on the battery is 15Volts. The lowest will be 10 Volts. I am thinking: 0x64 = 10.0 volts 0x65 = 10.1 volts 0x66 = 10.2 volts Is this a good approach? How would you arrange this? Thanks for your help! J.C. |
| Topic | Author | Date |
| LPC93X Family A/D Conveter | 01/01/70 00:00 | |
| Where have you looked so far? | 01/01/70 00:00 | |
| Where have you looked so far? | 01/01/70 00:00 | |
| codearchitect | 01/01/70 00:00 | |
| codearchitect | 01/01/70 00:00 | |
| not code | 01/01/70 00:00 | |
| not code, I thought I needed it | 01/01/70 00:00 | |
| What are you trying to do | 01/01/70 00:00 | |
| What are you trying to do | 01/01/70 00:00 | |
| What are you trying to do | 01/01/70 00:00 | |
| Basics of A/D Converters | 01/01/70 00:00 | |
| "my" Code Architect | 01/01/70 00:00 | |
| "my" Code Architect | 01/01/70 00:00 | |
| Help! | 01/01/70 00:00 | |
| with what? | 01/01/70 00:00 | |
| with what? | 01/01/70 00:00 | |
| how | 01/01/70 00:00 | |
| Good! | 01/01/70 00:00 | |
| x volts | 01/01/70 00:00 | |
| Vin | 01/01/70 00:00 | |
| both of them | 01/01/70 00:00 | |
| x volts varies | 01/01/70 00:00 | |
| in extreme detail | 01/01/70 00:00 | |
| I got it | 01/01/70 00:00 | |
| measure it | 01/01/70 00:00 | |
| DVM? | 01/01/70 00:00 | |
| Digital Volt Meter | 01/01/70 00:00 | |
| DVM | 01/01/70 00:00 | |
| VREF | 01/01/70 00:00 | |
| VREF | 01/01/70 00:00 | |
| loanguage | 01/01/70 00:00 | |
| Constant vs Percentage error | 01/01/70 00:00 | |
| Off Percentage | 01/01/70 00:00 | |
| percentage | 01/01/70 00:00 | |
| Percentage | 01/01/70 00:00 | |
| Converting Voltage to ASCII | 01/01/70 00:00 | |
| you should know better by now! | 01/01/70 00:00 | |
I should know by now | 01/01/70 00:00 |