In my effort to learn electronics, I've enrolled on the EE40LX Electronic Interfaces course on edX. This uses the example of building a simple robot as the basis for the course and seems just about at my level.
Having completed the preamble, I'm now at the point of starting to build the various components, the first of which is a 3.3v voltage regulator to power a TI Launchpad.
The Voltage regulator they suggest is the LM1086, but I've been having some trouble sourcing this, so figured it should be possible to swap out for the one offered by Pimoroni, so I ordered two of them (along with the Launchpad) and sat down today to assemble it together.
Now I know the pins on the voltage regulator supplied by Pimoroni are different to the ones on the LM1086 - but working on the assumption that they should work in pretty much the same way otherwise, I went about following the instructions to set it all up (being sure to connect the pins correctly) - but it's not working as I expected.
Long story short, I've hooked up a 9v power source (via my bench power supply) to the input pin (pin 1), and the negative lead to the ground pin (pin 2) - and was expecting a 3.3v reading across the ground pin and output pin (pin 3) - instead what I got was a 0.55v reading.
I don't know if I've maybe misunderstood how the voltage regulator is meant to work, but this doesn't seem right to me.
Can someone help? Thanks.