I'm using a pololu step-up voltage regulator (http://www.pololu.com/catalog/product/2117) to go from an unregulated battery (VIN line from an Arduino, powered by a 3.7v LiPo cell) to 12V.
No matter what I do, I can't get a voltage to show across the VOUT. There's definitely a voltage applied to VIN, and it's within spec (above the 2.5V minimum for the regulator). The VOUT line just falls rapidly to 0 when I put a meter on it.
Seems like a simple enough circuit. What could I be doing wrong?
EDIT: The circuit below is for the final application. I tried simply supplying 5V on the VIN line to the regulator, and measuring voltage between VOUT and GND, with the same 0 value.
simulate this circuit – Schematic created using CircuitLab
Here's another way I tried to wire it, with the same effect
Best Answer
The current out of that 754410 is probably not enough to drive the boost converter. I would build the same circuit like so:
simulate this circuit – Schematic created using CircuitLab
And 100 uF may not be enough. You may need 1000 uF! If so, you also want to add a few Ohms of resistance between boost-out and capacitor-plus, to avoid putting too much capacitive load on the boost converter all at once.