Timeline for Help me understand NPN transistors, circuit does not work
Current License: CC BY-SA 3.0
9 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jul 20, 2017 at 8:50 | comment | added | Dirk Bruere | Also, do not forget the protection diode across the relay coil | |
| Jul 20, 2017 at 8:49 | comment | added | Dirk Bruere | Very basic rule - to turn on an NPN raise the gate voltage more than 0.6V above the emitter voltage, usually through a resistor like you already have. BTW, in the above diagram you would burn it out instantly. Put the load in the collector side | |
| Jul 20, 2017 at 8:24 | review | Close votes | |||
| Jul 20, 2017 at 8:37 | |||||
| Jul 20, 2017 at 8:09 | comment | added | Harry Svensson | Possible duplicate of Driving a relay directly with a microcontroller? | |
| Jul 20, 2017 at 8:07 | answer | added | user103993 | timeline score: 2 | |
| Jul 20, 2017 at 7:53 | comment | added | MarkU | Related: electronics.stackexchange.com/a/25676/35022 | |
| Jul 20, 2017 at 7:51 | review | First posts | |||
| Jul 20, 2017 at 9:55 | |||||
| Jul 20, 2017 at 7:51 | comment | added | Andy aka | It won't work as you want without a relay coil. They're not telepathic, they need coil current to operate. | |
| Jul 20, 2017 at 7:48 | history | asked | fUrious | CC BY-SA 3.0 |