| ??? 05/01/09 11:33 Read: times |
#164984 - Thanks, I'll give it a try Responding to: ???'s previous message |
Hi,
Thanks very much for the responses. I'm going to give Michael's circuit a try. The active low output also sorts another concern that I had about my circuit, as the solenoid blipping on on power-up was a potential safety risk. If I replace the pair of 2N3055 transistors with a TIP120 in Michael's circuit, does anyone foresee any problems? The solenoid current should be about 0.1A. Thanks again, Warren |
| Topic | Author | Date |
| Driving TIP120 from 8052 | 01/01/70 00:00 | |
| It is the Current | 01/01/70 00:00 | |
| Use this type circuit | 01/01/70 00:00 | |
| Thanks, I'll give it a try | 01/01/70 00:00 | |
| 0.1A | 01/01/70 00:00 | |
| Michael circuit is fine with some diff values. | 01/01/70 00:00 | |
| Success! | 01/01/70 00:00 | |
You use a Darlington, ... | 01/01/70 00:00 | |
| Check values | 01/01/70 00:00 | |
| is Q2 not a bit overkill? | 01/01/70 00:00 | |
| Base current and transistor beta | 01/01/70 00:00 | |
| logic level MOSFET | 01/01/70 00:00 | |
| they do make p-channel logic mosfets | 01/01/70 00:00 |