Term 1 week 4 electronics

1 day ago Andrew came and did a electronic session with Mamaku.  He was showing Mamaku how to put the bits together. He showed us the bits and pieces we needed to put together like a LED.

He taught us how to make a device that tests our strength with two nails and a battery thing with holes in it. You had to squeeze it as hard as you could until you saw a flash. 

If it flashes twice it means your strength is twenty and my one was one hundred and twenty.

Have you used LED's before?