Re: [amsat-bb] Controlling 28V relays

["Jim Shorney" <jshorney@xxxxxxxxxxxxx>]

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On Fri, 1 Feb 2002 16:01:53 -0600, Estes Wayne-W10191 wrote:

>I use a DPDT switch to latch a 28V coaxial relay with a 24V pulse, then keep it latched with 12V.  When the DPDT switch is in the OFF position, it charges a large Electrolytic capacitor.  When the switch moves to the ON position, it places the capacitor in series with the 12V power supply.  Current flows through a diode after the capacitor is discharged.


I did the same thing once with a switching transistor and a couple of
steering diodes instead of a switch.    Very simple circuit.

- -- 
Jim Shorney      -->.<--Put complaints in this box
jshorney@inebraska.com
nu0c@amsat.org
Ham Radio NU0C
Lincoln, NE, USA
EN10KA
http://incolor.inetnebr.com/jshorney/
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