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Possible Duplicate:
How to implement an isolated connection matrix

I need to put current on up to 30 lines; one at a time. What kind of electronics solutions are there to this kind of problem.

I can't drive it directly with a microcontroller because I need 28 VDC.

Response to Comments:

  • 28 VDC
  • Less than an amp of current
  • Only needs to switch as fast as a human can press a button. maybe a few times per second max.
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  • \$\begingroup\$ Is that 28 V AC or DC? How much current? How fast do you have to switch? (There's a huge difference between 100 times per second and once a day) \$\endgroup\$ – stevenvh Oct 11 '12 at 14:55
  • \$\begingroup\$ Hah. I'm working on a similar problem! \$\endgroup\$ – Rocketmagnet Oct 11 '12 at 15:01
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Driver for NMOS to implement a high side switch, is the best I could find.

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