zonejilo.blogg.se - Pn2222 transistor threshold

#Pn2222 transistor threshold code#

Vgs(max) - Same as Vds, except that it tells you how much voltage you can send to the gate pin (the one that controls the transistor).

this tells you how much voltage you're going to lose across the transistor per amount of current you ask it to pass, and how much power it's going to be dissipating (which heats it up)

Rds(on) - How much resistance the transistor causes when it's "turned on".

This pinout is different for different parts and different manufacturers, so it's a good idea to verify this from the manufacturers' datasheet every time you are using a new part. The big metal tab is also connected to the Drain terminal, internally (so watch out when working with the transistor, since this metal piece is at the same voltage as part of your circuit!). I would just like to add that another very important bit of information in the datasheet is the pinout - in our case the Gate is pin 1, Drain is pin 2, Source is pin 3. I will not repeat RobhercKV5ROB's nice summery of the important specs. Simulate this circuit – Schematic created using CircuitLab I know that I wouldn't need an Arduino for that )Įdit 3: Included schematic.

#Pn2222 transistor threshold code#

There isn't really any more valuable information about the transistors which came along if you were hoping for that.Īlso the Arduino supplies 5V and the code I uploaded just sets the transistor pin HIGH when the button is pressed. As suggested by joren vaes i made another photo of the setup which shows the wiring properly and photos ( first page, second page) of the instructions which came along in the kit. The old transistor doesn't heat up noticeably. With the new transistor the pump moves super slow and the transistor got worryingly hot. Using the 9V batterie with the 12V pump works fine but only with the old transistor. I did some experimentation with pump, 9V and older/newer transistor. So it looks like the new transistor can't handle the 12V? To my surprise that actually made the motor spin. I included a schematic at the bottom.Īs joren vaes suggested I used the new transistors with the old motor and a 9V power supply. If I missed any important information please ask in the comments and I will include it in my post. What does the transistor actually do which I bought and can I still use it for something (I actually bought quite a lot of them.)?.Could you point out which values in the datasheet are important to me so I can pay attention to those when I look for another transistor?.Also I couldn't find the datasheet for the one delivered with the Arduino. I found the datasheet to the newly acquired transistor (listed on the page of the online store I bought it from) but I don't really understand anything it's trying to tell me. It is labeled IRF520N IOR P702D AP9Q (see picture right) but when I use that transistor the pump doesn't start pumping.Īpparently the two transistors are not completely identical. Since then I decided I wanted to buy more transistors of the same type and I found one which I thought was the same.

I have started my own little project and bought a 12V pump and hooked it up just as I previously did with the motor from the kit and it worked perfectly (see picture). The printing on the transistor reads IRF520N IOR P533B D5A2 (see picture left). In that kit was a 9V motor with the proper transistor (I think these are also called MOSFET?). I recently bought an Arduino beginners kit. Now go apply these ideas to the other two datasheets I included above and see how all this holds up.Please be gentle as I am a total newbie with electronics. The low-side switching of a load requiring a higher voltage (than \$V_\$.