I'm about to embark on my first electronics project and would like to check off a safety question:
I want to build a bicycle hub dynamo -> USB charger based on these instructions.
It is basically a rectifier circuit to convert 6V, 3W AC produced by the hub dynamo to 5V DC needed for USB.
In order to conveniently test and experiment with the circuit, I'm thinking about buying a wall power adapter (this one) that converts 230V AC (Europe) to AC, 9V 500mA, since this is very close to the 6V AC, 500mA that the hub dynamo provides.
I did some research and it looks like AC is up to 4 times more dangerous than DC. My question: would it be dangerous if I accidentally came into contact with the 9V, 500mA AC provided by the wall power supply?
Thanks a lot!
To clarify, by "safe" I mean, "Can I harm myself?".