45 more posts in this thread. [Missing image file: IMAG0336.jpg]
So, I need to drop 12v from my moped to 8v to power this LED light.
I was thinking diodes in series but that would take a lot of diodes and they would get really hot.
Then I thought of an LM7808, but that can only handle 1A, the light will take 10-12 watts at 8v which is 1.25 to 1.5A, so that wont work unless I run 2 in parallel, but I don't know if you can do that.
Somebody said I could use a 7808 with a 2n3055 transistor, but I have no clue how to design a circuit to utilize this.
Here is a link to the light:
23 more posts in this thread. [Missing image file: subpage_df_link.jpg]
/diy/, how would I go about changing the liquid in a drinking fountain? I opened one up (a wall mounted one in a dorm) and noticed that it's connected to a water source, so I guess my question is whether or not that source of water is pressurized, or if it becomes pressurized somewhere else in the system?
Would it be as simple as say, running a tube into a bottle and having the machine pump it up for me, or would I need a pressurized source of said liquid?
I'm thinking something like the hawaiian punch fountain that was seen in the movie Mr. Deeds
2 more posts in this thread. [Missing image file: IMG_1709.jpg]
i want to get into woodworking. i wanted to make a small box, 18X12X8 cm on the inside, using dovetail joints. i've got this bed with 1cm thick wooden sides that i was going to throw away anyhow, would it do ok?
i only know the measurements that i need on the inside, how do i know how big to cut the pieces?
any tips for a first time wood worker would be appreciated.
pic related, it's the bed base i was going to throw away.