Matrix user forums

Hello,

With a microcontroller and a n-channel mosfet (RFP12N10L) I try to activate a load of 12V. (see atachment) If the load is a dc motor (700 mA) it works correct.
If the load is a lamp (1,2A) it doesn't work. It seems in that case that 5V on the gate is now to low to activate the lamp. Is there someone who can adjust the shematic so that I can switch on the lamp?

Thanks in advance
dirk

Hello,

What about replacing the MOSFET with a NPN type TIP transistor. The TIP122 or similar should be able to do the job.

thanks

I will try it

dirk

Available from here for Β£0.18 each in one offs.

http://www.rapidonline.com/Electronic-C ... /kw/TIP122

Also please note that you will need a 1K resistor or there abouts in between the pin of the microcontroller and the base of the transistor.

I have also tried to replace the RFP12N10L by a IRF3415 fet. And that works also very good.

dirk