NE555 Voltage Doubler

Here's a cheaper-to-build alternative for MAX1044/ICL7660 voltage doubler charge pump. According to the documentation, this puppy is capable of 30mA of output current, so it'll be enough for any stompbox use. Circuit isn't as small, as using NE555 timer chip will need couple of resistors and caps to get the job done. Still, simple and small enough.