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how to control a high voltage stuff with microcontroller

 
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SHEREKILI
Newbie


Joined: 24 Oct 2008
Posts: 1

PostPosted: Tue Mar 30, 2010 6:33 pm    Post subject: how to control a high voltage stuff with microcontroller Reply with quote

hi all i goat my first microcontroller yesterday as a learning kit at radio shack it is called parallax basic stamp bc-2 item # 90005
i was playing, discovering and learning with it a few days but know am and up with tons of questions

first question is how can i control lets say a 120v lamp with it Rolling Eyes?

next question is this thing only has 9 volt Battery sou its max output is 9 volts lets say i want to control a few 12 volt motors with it how can i do that?

i can figure out by my own how to program but i need help to how to connect higher voltage stuff to microcontroller?


Cool please go easy on me i am new in this microcontroller world Question Idea
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Pete_m
Semi Newbie


Joined: 30 Dec 2009
Posts: 6

PostPosted: Fri Apr 23, 2010 11:03 am    Post subject: Reply with quote

Quote:
first question is how can i control lets say a 120v lamp with it Rolling Eyes?


There are a lot of ways to do this. If you want to dim the light google SCR circuits. If its just on/off control google relay circuits or Solid State Relays - SSR's.

Quote:
next question is this thing only has 9 volt Battery sou its max output is 9 volts lets say i want to control a few 12 volt motors with it how can i do that?


I think you will find that "max output" is actually 5v. Google H-bridges for some information on how to control a motor.
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arachne007
HG Junior


Joined: 23 Sep 2010
Posts: 11

PostPosted: Sun Sep 26, 2010 5:30 am    Post subject: Re: how to control a high voltage stuff with microcontroller Reply with quote

SHEREKILI wrote:

first question is how can i control lets say a 120v lamp with it Rolling Eyes?

You need to isolate this high voltage not to destroy ur micro. The easiest way is using Relay or SSR (Solid state relay)

SHEREKILI wrote:

next question is this thing only has 9 volt Battery sou its max output is 9 volts lets say i want to control a few 12 volt motors with it how can i do that?

This can be done using transistor driver circuits. You can use separate power supply with common ground.
Just as Pete_m said, for motor controlling, many people use H-bridge configuration.
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