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Topic: Arduino + solenoid powered by on source (Read 798 times) previous topic - next topic


Hello. I would like to power solenoid and arduino with one power source. Is it safe to connect it like it is on the picture? Thanks.


What is the resistance of the solenoid?
Its best to label the GND as 0 volts rather than -10V.
What is the current rating of the 10 volt power supply?
Always blame yourself.


Solenoid: http://www.ebay.com/itm/330850756486?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
12V 1A

As a power source i need to use 9V battery


I see your solenoid is 12 volts, 1A.
It may not work at 10 or 9 volts.  If it does, your power supply should be rated at at least 1.5 amps
as your controller needs power.
I think I would add a diode & large capacitor across the power supply o/p (may be 470uF) to supply the initial solenoid surge current.
Always blame yourself.


OK. Thanks a lot. I will try it. I have to buy these components. What about to add 100k pulldown resistor between transistor gate and GND to avoid problems when reseting arduino?

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