Timeline for Arduino Nano and water pump (2n2222a switch) [duplicate]
Current License: CC BY-SA 3.0
18 events
| when toggle format | what | by | license | comment | |
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| Jul 4, 2017 at 23:05 | history | closed |
Dmitry Grigoryev Enric Blanco Chris Stratton CommunityBot |
Duplicate of Turning water pump on/off using Arduino Uno R3 | |
| Jul 4, 2017 at 21:53 | answer | added | Malo87 | timeline score: 0 | |
| Jul 4, 2017 at 14:43 | comment | added | Transistor | Replace the transistor with a new one and replace the motor with a resistor and LED. Get that working and then try with the motor. You can also measure the motor current with your meter by connecting them in series directly across the supply voltage. When you have that you can check the transistor datasheet to see if it can handle it. | |
| Jul 4, 2017 at 13:11 | answer | added | Tjaart | timeline score: 0 | |
| Jul 4, 2017 at 13:03 | comment | added | Malo87 | Yes, Maybe it not supporting the starting current, but If use the tester to measure the current flowing between motor and collector I should see at least some variations on the display.. Having the positive pole of the motor on the battery and the negative pole of the motor on the collector is right, isn't it? | |
| Jul 4, 2017 at 12:59 | comment | added | Malo87 | That's a good shout.. Maybe the transistor is just gone. Can someone confirm me than the the circuit is correct? It's currently assembled on a breadboard, I'll check again that all the connection are ok and try to replace that FET with a new one. I've got only a bunch of 2n2222, it's not easy to find a place that sells this components in London. If I need a different one I've wait for the shipping.. | |
| Jul 4, 2017 at 12:59 | comment | added | Peter Smith | The 2N2222 supports 800mA, but I suspect it cannot support the start-up current required by the motor. | |
| Jul 4, 2017 at 12:21 | comment | added | Glenn W9IQ | Have you tried replacing the transistor with a new one? | |
| Jul 4, 2017 at 11:55 | comment | added | Malo87 | As per datasheet, 2n2222a transistor supports up to 800mA, so I'm well below the limit. The pump is a tiny aquarium pump | |
| Jul 4, 2017 at 11:52 | comment | added | Malo87 | Hi, as I've written in the question I've used a 2n2222 transistor. As well the pump is a 5,5/12v (3W max) pump which consumes 1.25W at 8.3v (as in the picture). I can give this number since i've measured 150mA of current when powering the pump directly from the batteries. | |
| Jul 4, 2017 at 10:08 | review | Close votes | |||
| Jul 4, 2017 at 23:09 | |||||
| Jul 4, 2017 at 9:53 | comment | added | Dmitry Grigoryev | Which FET did you use? | |
| Jul 4, 2017 at 9:51 | comment | added | Andrew Morton | If you read a bit further on the page you linked to you'll find that user SPhoenix had success using a TIP142 transistor. If you're going to be doing a bit of this sort of thing, you might as well get a pack of five-or-so of those transistors in TO-220 cases and perhaps a couple of suitable heatsinks. | |
| Jul 4, 2017 at 8:57 | comment | added | Bimpelrekkie | It is crucial to know how much power or current the pump uses. That 2n2222 is just a small, low power transistor. It cannot switch on/off much more than a small toy motor. | |
| Jul 4, 2017 at 8:56 | comment | added | dandavis | pumps need a lot extra to start (think slow-blow fusing), more than what a dmm will later show when measuring current. you're right on the margin of a fully-running pump. | |
| Jul 4, 2017 at 8:49 | comment | added | nickagian | Have you measured how much is the voltage at the - side of the motor? How much current flows through the motor? | |
| Jul 4, 2017 at 8:38 | review | First posts | |||
| Jul 4, 2017 at 9:53 | |||||
| Jul 4, 2017 at 8:34 | history | asked | Malo87 | CC BY-SA 3.0 |