IRF Datasheet, IRF MOSFET N-Channel Transistor Datasheet, buy IRF Transistor. ⑥ Uses IRF data and test conditions. Electrical Characteristics @ TJ = 25°C (unless otherwise specified). Parameter. Min. Typ. Max. Units. The following post explains the main features of mosfet IRF which It’s technical specifications may be understood with the following data.
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I suspected the transistor to be broken, but I switched it out several times and the results were the same.
IRF MOSFET Datasheet pdf – Equivalent. Cross Reference Search
Running your Arduino at 5 V this should work ok out to a couple of Amps. The LED is to easily see if the valve is open or closed. Email Required, but never shown. However I build the exact same project some months ago and used the exact same parts – the same resistances, the same transistor type and the same valve and it worked perfectly with a 5V gate voltage.
Looking at the details in the datasheet you need to understand that the V GS is applied between the Gate and source of the N-Channel FET, you can look at Figure 1 to see the switching characteristics.
IRF3205 MOSFET. Datasheet pdf. Equivalent
I use a IRF transistor, which might be a bit of an overkill, but it was the smallest I had. Try your circuit in this form: My basic idea is that if the soil gets to dry the arduino sets the gate voltage, which turns the transistor on and the valve opens. irv3205
Sign up using Email and Password. I learned from another thread here that this makes sense, because a higher gate voltage will let more current flow through the transistor.
IRF Datasheet(PDF) – International Rectifier
Iirf3205 I connected the gate pin of the transistor directly to the 12V power source the circuit worked as intended and the valve opened. Thanks a lot, now the circuit works exactly as I wanted!
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The 5 volts seem to be to low to let enough current flow for the valve, which drains around 2. The arduino outputs 5V which is just over the threshold voltage of V Datasheet: You cannot drive the IRF in the manner shown.