wlewis Posted January 26, 2012 Share Posted January 26, 2012 I wish to drive a small solenoid from the using the GPIO on a GeoBrick LV. Details from the manufacturer documentation follows: Each valve requires 24 V DC (+10%, -15%) at 0.5 W (approximately 20 mA) to operate. My concern is with another statement that they put in their documentation: A point to remember in choosing or designing control circuitry is that the valves are inductors and the control electronics should be protected (by bypass diodes) against the voltage surges which will arise when the valves are switched off. Is this required, or is there sufficient protection in the GeoBrick LV output circuitry to avoid the need for the bypass diodes? Link to comment Share on other sites More sharing options...
Richard Naddaf Posted January 27, 2012 Share Posted January 27, 2012 Page 244 of the Geo Brick LV manual shows Schottky power rectifiers (MBRS140T3) already installed, for both sourcing|sinking. You should be good to go. Link to comment Share on other sites More sharing options...
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