| ??? 05/02/09 11:11 Read: times |
#165002 - Success! Responding to: ???'s previous message |
I have made the new circuit board and tested it, and everything is now working as it should.
I used Michael's circuit with a few alterations. I replaced Q2 and Q3 with a TIP120, put a 1k resistor in place of the 15 ohm resistor, and omitted the 150 ohm resistor (since the TIP120 has built-in base-emitter resistors, as Michael mentioned). Thanks to everyone for the help in resolving this issue. 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 |