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Forum Newbie
Group: Forum Members
Last Login: Monday, April 05, 2010 5:16 PM
Posts: 2,
Visits: 4
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| Saw in another post that you didn't bat an eyelash at someone using a lead acid battery to power a serializer. But the user guide also has a warning in red to not exceed 12v. SLA's will often get up to 13.6v right after topping off. Just want to make sure it's OK to power my serializer3 with a fully charged lead acid. Do you think it would survive being connected to an SLA while it's being charged at 14.8 volts? I never found a circuit diagram for the serializer. Should I assume that the voltage regulator is just there to power the controller and that the on-board h-bridges get unregulated power directly from the main power connector? And if you're not using the alternate unregulated servo power input, the servos are getting regulated power? Thanks.
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Forum Guru
Group: Moderators
Last Login: Wednesday, March 16, 2011 1:17 PM
Posts: 73,
Visits: 96
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| There are a couple reasons for limiting the input voltage. #1 is that the higher the input voltage the more the Regulator has to drop as heat so it can get very hot at or above 12V. A heatsink will help here alot, even if it is a gemClip clipped on it. #2 is that there is a 1/3 voltage divider on the board so the PIC and read the battery voltage. At 15V that would put 5V on th epin on the pic. Going above that could damge the pin and maybe the pic. also, The pic gets regulated voltage. The H-bridge gets full battery voltage. Before Version 3 the servos get regulated voltage. V3.0 has a header for the user to supply its own voltage. So 13.6 or 14.8 will not damage the board, But the regualtor can get very hot, sometimes hot enough to make the pic hot, so find some way to cool it down. Ringo
Ringo Davis
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Supreme Being
Group: Administrators
Last Login: Monday, October 31, 2011 9:18 PM
Posts: 640,
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