Connecting Micro To Motor Directly?

[ama_trig]

I'm using tiny 2313. Can I source current (48mA) by paralleling micro pins?

 

[nandhu015]

It is not advisable to connect a micro directly to motor

Use a transistor to drive the motor and dont forget the reverse diode

Nandhu

 

[ama_trig]

but the problem is the design is so small :| and its powerd by 3 volt cr2032 battery
so if I use transistor, the motor drops its torque(rated for 2.75v)! what should I do?

 

[kender]

I'm using tiny 2313. Can I source current (48mA) by paralleling micro pins?

Try it. I don't see fundamental problems with this approach. Put a capacitor to ground to reduce the brush noise going back to the uC. As Nandhu had suggested, add a reverse diode in parallel with motor (it should be a Schottky diode). Torque may still end up being smaller than rated.

 

[miredox]

An external switch-mosfet will not drop more power than the build-in CMOS mosfets of the microcontroller itself, the opposite will be true...

 

[pranam77]

Instead parelleling two Micro pins, using a SMD Transistor to switch the motor will yield better current i guess.After all the required current is just 48 ma as mentioned...Cheers

 

[elrayes]

use L298 H-bridge IC, or L293, simple solutions and won't expose you to the danger of "burning" the PIC.

 

[yus]

i've tried this kind of project before.
luckily, noting (noticeably) happens to my pic16LF73.

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