Anyone use these?
I just built a univibe style pedal. For power, I used a MAX1044 to convert 9vdc battery to (approximately double the volts) using documents provided by RG. Basically, instead of a switch between pins 1 and 8, I tied them together, otherwise, it is identical to the circuit at RGs site. I used 2 shotky diodes and I used two identical 10uf electrolytic caps to get about 17 volts out.
I took the output into a 7815 voltage regulator and strapped a 10uf between the 15 volt out and ground.
I put this on its own circuit board. Then, where the power connects to my effect board, and several places along the V+ trace, I placed 0.1uf caps to ground.
I thought this would make sure my power was clean.
When I look at the voltage out on my scope, I get a solid 15 volts out, but I also see a periodic wiggle on the supply line.
When I replaced the 1044 and 9v battery with my homemade bench supply, I do not see the same wiggle.
Any suggestions for using this chip to get a clean supply output?
Thanks in advance.
it may help to swap a 100uF for that 10uF across the regulator.