Society of Robots - Robot Forum
Electronics => Electronics => Topic started by: rollingrobot on November 22, 2009, 11:06:26 AM
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My 5v regulator is going nuts with 9v battery plugged in and I think its because a bridge between GND and + via ceramic capacitor. My multimeter says there is 0 resistance between these two. I don't know what else to do. I tried resoldering and stuff. Maybe these two pics would help :x
(http://i48.tinypic.com/245j4ec.jpg)
(http://i45.tinypic.com/2ykdobd.jpg)
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Hi,
I think its because a bridge between GND and + via ceramic capacitor. My multimeter says there is 0 resistance between these two. I don't know what else to do. I tried resoldering and stuff. Maybe these two pics would help :x
A little less solder would help - and more control with where it goes.
You probably created a solder bridge and judging from your photos, you really need to practise.
Desolder the entire circuit. Tin wire ends and pads. resolder with minimum amount of added solder.
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Either the above or, trace around all the parts until you find where the bridge is... Otherwise soeren's option is all you have.
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Isn't the 0.1uF capacitor the bridge? I just do not understand the purpose of the capacitor.
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Hi,
Isn't the 0.1uF capacitor the bridge? I just do not understand the purpose of the capacitor.
No, a capacitor should measure infinite ohms. It's purpose is to stabilize against noise transients.
Try reading through this Capacitor Tutorial (http://www.sentex.ca/~mec1995/gadgets/caps/caps.html)