Recent content by lindhaw

  1. L

    2n2222 npn transistor voltage question

    I dont really care about the buzzer so much I just was thinking I could use this circuit as a very basic encoder. I came across an old PLC at a garage sale that Ive been playing with. I want the 24v because that is what the PLC accepts.
  2. L

    2n2222 npn transistor voltage question

    Well I dont know very much at all, Im just in my first circuits class at WWU. Ok so i did a quick search for emitter follower and Im going to be honest, Im not sure what I was supposed to take away from my reading. Are you suggesting that I replace everything coming off the second pin of the...
  3. L

    2n2222 npn transistor voltage question

    I was only planning on changing the 9vdc to 24. does this mean I need to change up the R5 value?
  4. L

    2n2222 npn transistor voltage question

    sorry i forgot to add that in the first post. the buzzer only draws 5mA (its just one i had laying around).
  5. L

    2n2222 npn transistor voltage question

    So im working on a project and Im using a diagram I found on this forum but I want to alter it a little. The transistor on the right is a 2n2222 npn transistor. I want to change the 9v to 24v. Ive been looking up datasheets on it and I think it will do what I want but I wanted to get a second...
  6. L

    Problem Using Bipolar Transistor as a Switch

    ok dumb question sorry I just looked it up and I think i can manage one of those. Thanks for the advice! Ill let you know how it goes!
  7. L

    Problem Using Bipolar Transistor as a Switch

    Ya thats correct. Im not familiar with those yet. Is that something that I could make or is that something that I should just buy?
  8. L

    Problem Using Bipolar Transistor as a Switch

    I dont think I can do that because I think it would just burn up the emitter and possibly the receiver. Ive also been looking into this http://www.goldmine-elec-products.com/prodinfo.asp?number=G18694 but ive never used anything like that so im not sure if the response time will be fast enough.
  9. L

    Problem Using Bipolar Transistor as a Switch

    Im new here and Im currently working on a small IR encoder project. I have the encoder working great but now I need to use the 5vdc signal that comes from the encoder and make it 24vdc. I am currently trying to use a bipolar transistor but its not working. The basic diagram that Im going off of...
Top