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led clock avr
you can check this out: www.josepino.com
there are lots of projects to build there and all are tested working. complete with schematics and hex file ready for burning on PICs!
cd4017b projects
yup! i know 4017 can be cascaded, but i don't know how :(
better look for its datasheet here:
html here: http://focus.ti.com/docs/prod/folders/print/cd4017b.html
pdf: **broken link removed**
i would suggest that you should use LDO regulators as what your application(wireless) required.
LM317(adjustable reg) and 78L05(fixed 5V reg) are cheap and easy to use, BUT they are linear regs that consumes more power compared to LDO/ISR(switching regulators).
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