Hi Everyone, I put an amplified ipod system on my Harley and was getting noise through the amp while plugged into a store bought 12V to USB adapter to charge. I built a 5 v reg with filters that work great, but I want to switch off the charger while riding and as soon as I turn off the ignition, I want it to charge for 2 hours. I put a monostable 555 because it will work of the pulse of the ignition turning off and making the normally closed contacts to 12 volt, but not be affected by the 12 volts being there for days. Am I right on this. Thanks for your help.
PS: the values show on the filter portion are not actual. It is just 2 pi filters. Ferrite beads and caps
PS: the values show on the filter portion are not actual. It is just 2 pi filters. Ferrite beads and caps