http://www.rentron.com/PicBasic/relay-motor.gif
What transistor to choose ? i tryed 2n2222a but it don't work.
What transistor to choose ? i tryed 2n2222a but it don't work.
http://www.atof.ru/pea/relay/rm84.pdf here is of my 2C/O relay datasheet i didn't find anything about coil current, only found minimal switching current - 5mA. (Coil code 1005)(5V)What current does the relay coil require?
yeah now i am using 470R resistors. base controlling with pic16f88. uC output current 20mA, required for base current 15mA when collector current is 150mA, relay coil current 40mA. I think everything should be ok, but...Have you tried switching the resistors yet? I would think 2n2222s would be just fine so long as they received ample base current.
I know pin out quite well, http://www.buxcomm.com/catalog/images/mp2222_small.gif easy to remember.Make sure that your transistor pins are oriented correctly. When I first started in electronics (oh..... 8 weeks ago), I kept forgetting that the pinout I was looking at showed it with the pins facing UP - hence I had the collector and the emitter reveresed. Make sure that you haven't done that.
its more than enough for 2n2222a because at 150mA it requires only 15mA to open. everything should work :/Hello,
I did have a look at the RM84 datasheet.
It says at the coil data block that the rated power consumption is 0.4.. 0.48 Watt.
This implies a current of 80 to 96 mA @ 5 Volts.
Bertus
Thank You, i will post tomorrow about my progression.Hello,
A 2n2222A is a little bit lean for it.
The 2N2219 can handle a bit more.
See the attached datasheet for the 2N2222 + 2N2219
I also attached a transistor table for you (unzip it to read in excel or open office).
Bertus