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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Thanks a lot, now the circuit works exactly as I wanted!
(PDF) IRF3205 Datasheet download
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The LED is to easily see if the valve is open or closed. If the circuit is connect as in the picture only 0. I suspected the transistor to be broken, but I switched it out several times and the results were the same. The arduino outputs 5V which is just over the threshold voltage of V Datasheet: Sign up or log in Sign up using Google.
IRF Datasheet(PDF) – International Rectifier
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. Running your Arduino at 5 V this should work ok out to a couple of Amps.
Post as a guest Name. I built this circuit as part of an automatic irrigation system and I am not sure how high the gate voltage should be: However I build the exact jrf3205 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.
I use a IRF transistor, which might be a bit of an overkill, but it was the smallest I had.
IRF Transistor: correct threshold voltage – Electrical Engineering Stack Exchange
I learned from another thread here ir3f205 this makes sense, because a higher gate voltage will let more current flow through the transistor. Email Required, but never shown.
Try your circuit in this form: 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.
When I connected the gate pin of the transistor directly to the 12V power source the circuit worked as intended and the valve opened.