A while back I posted to get some help on a circuit - A picture of the circuit I ended up with is here -
**broken link removed**
A problem I have with this circuit is that for some reason, when I initially plug in the power I get a little jolt of power that throws my relays. This is not related to anything on the bootup of the gumstix as it occurs immediately when power is applied, not during the boot process when probing of GPIO ports might occur.
Is there something I can do with the circuit to prevent this? Could someone help me understand why it occurs? It seems to be related to the gumstix computer.
Thanks!
EDIT ---
One more question. I was using a 9V battery to light a rocket igniter. It seems a capacitor might be a better option as I really need a short burst of lots of power.
Would something like this do the trick?
http://www.sparkfun.com/commerce/product_info.php?products_id=8982
**broken link removed**
A problem I have with this circuit is that for some reason, when I initially plug in the power I get a little jolt of power that throws my relays. This is not related to anything on the bootup of the gumstix as it occurs immediately when power is applied, not during the boot process when probing of GPIO ports might occur.
Is there something I can do with the circuit to prevent this? Could someone help me understand why it occurs? It seems to be related to the gumstix computer.
Thanks!
EDIT ---
One more question. I was using a 9V battery to light a rocket igniter. It seems a capacitor might be a better option as I really need a short burst of lots of power.
Would something like this do the trick?
http://www.sparkfun.com/commerce/product_info.php?products_id=8982
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