Timeline for Why does the LM7805 heat up?
Current License: CC BY-SA 4.0
7 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Feb 26, 2022 at 6:38 | comment | added | Shobeh | I wish I could. 3 AAs in series is pretty heavy so I used the single and light 9 V battery and reduce it to 5 V using LM7805 so that the 3 V DC motor can turn. It didn't end well though. | |
| Feb 25, 2022 at 12:52 | comment | added | Peter Jennings | If you look closely at the photograph, the motor is not stalled. The blades of the propeller are not in contact with the surface, and the battery isn't connected on one side. | |
| Feb 25, 2022 at 11:13 | comment | added | Andy aka | A 9 volt battery of the type in your picture is barely acceptable for DC motors and, a 6 volt supply to a 7805 is well-below the minimum needed to provide regulation. I urge you to use a more powerful battery arrangement like three AAs in series (4.5 volts) and have them directly connected to your motor. | |
| Feb 25, 2022 at 10:43 | comment | added | Shobeh | Thanks for the assistance, comrade! I think I must weaken the power of 9 V battery and turn it into 6 V so the LM7805 will be usable. Thanks! | |
| Feb 25, 2022 at 10:40 | comment | added | Andy aka | Data sheets and ammeters can give you those answers @Shobeh | |
| Feb 25, 2022 at 10:35 | comment | added | Shobeh | I wonder how much power this DC motor eats up. I knew it needs 3 V to make this DC turn but I wonder how much current it needed to complete turn. | |
| Feb 25, 2022 at 10:14 | history | answered | Andy aka | CC BY-SA 4.0 |