| ??? 05/01/07 11:53 Read: times |
#138369 - agreed Responding to: ???'s previous message |
But Mr Heisenber tells us that it is impossible to measure anything without affecting the measured thing!
agreed; however measuring a state (HI/LO) may introduce a 'nominal' load however measuring an 'open' will introduce a (grey) voltage. I do believe that with a significant input impedance, measurements of voltage levels can be dome with minimal interference, whereas introducing a voltage can not be considered "minimal interference". Thus "a 'probe' that makes the circuit work different when applied" is much more likely with a voltage introduction than with an (insigificant) load introduction. Erik |
| Topic | Author | Date |
| tri state input reading | 01/01/70 00:00 | |
| tri-state | 01/01/70 00:00 | |
| Reading TriState | 01/01/70 00:00 | |
| Hi-Z reading | 01/01/70 00:00 | |
| Logic Probe Concept | 01/01/70 00:00 | |
| Window Comparator | 01/01/70 00:00 | |
| Build Or Buy | 01/01/70 00:00 | |
| Using Analogue Methods to test for Hi-Z | 01/01/70 00:00 | |
| Spare ADC and DAC on your micro? | 01/01/70 00:00 | |
| search found | 01/01/70 00:00 | |
| Some mistake | 01/01/70 00:00 | |
| 100k resistor | 01/01/70 00:00 | |
| An idea... | 01/01/70 00:00 | |
| Fundamental Logic and Hi-Z impedance | 01/01/70 00:00 | |
| Some thoughts on the tristate detection | 01/01/70 00:00 | |
| not 'the first', but THE problem | 01/01/70 00:00 | |
| Heisenberg | 01/01/70 00:00 | |
agreed | 01/01/70 00:00 | |
| thank you | 01/01/70 00:00 |