3.3 Voltage Regulator not working?

Other Hardware General Electronics
1

Hi!

I am trying to test out a voltage regulator module using the LM1117T and two 10 uF Capacitors. I had some 50V capacitors sitting around so they still should work even though they are giant. I don't really know what I am doing when it comes to reading the wiring diagram(Группа компаний Промэлектроника – один из крупнейших российских поставщиков электронных компонентов). It looks like all I have to do is put a capacitor on the input and then the output. I have the small circuit hooked up to the Arduino's 5V rail for testing purposes. I won't actually use it that way, I just don't have a variable power supply yet.

When I use it as pictured(Imgur: The magic of the Internet), using the multimeter, I see that it gives 4.64 volts. This is not 3.3 volts so I was wondering what I was doing wrong?

Thanks a bunch in advance!

2

Pinout of the 1117 is GND-OUT-IN.
Your diagram shows Vin connected to the ground pin.
A ground wire is needed.
The regulator can't work with just two wires.
Leo..

3

Awesome it works!

Now where do I put the capicator?

Thanks again!

4

According to the datasheet: 10uF from intput to ground, and 100uF from output to ground.
Close to the regulator. Tantalum is preferred.
Leo..