| ??? 02/25/09 04:40 Read: times |
#162793 - Common Sensor too is a Diode... Responding to: ???'s previous message |
A common sensor can also be a low cost silicon diode. Forward biased with a constant current source of 1mA the diode offers an ideal medium impedance current loop type interface. A single opamp can scale and adjust the temperature linear forward voltage drop of the diode to levels that can be easily read by an MCU A/D converter. The extremely low cost 1N4148 will make a very nice sensor.
Michael Karas |
| Topic | Author | Date |
| Looking for a Temperature Sensor for small and cold places | 01/01/70 00:00 | |
| KTY series? | 01/01/70 00:00 | |
| KTY nice suggestion | 01/01/70 00:00 | |
| Yes, from time to time... | 01/01/70 00:00 | |
| Digital Thermometer with 1wire PWM output | 01/01/70 00:00 | |
Temperature accuracy | 01/01/70 00:00 | |
| Why not a thermocouple? | 01/01/70 00:00 | |
| Thermocouple already used | 01/01/70 00:00 | |
| So do not use a bare one. | 01/01/70 00:00 | |
| Wiring problem | 01/01/70 00:00 | |
| Common Sensor too is a Diode... | 01/01/70 00:00 | |
| PN junction is affected by Temperature | 01/01/70 00:00 | |
| small temp sensor | 01/01/70 00:00 | |
| Thermistor | 01/01/70 00:00 |