Geek Area

3V Devices to 5V CMOS

Pic input pins have a worst case voltage range of 0.8V – 4V @ 5V supply (0.2 VDD – 0.8VDD). The TTL pins have a better range than this.

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Project HiJack – A Great Power And Data Transfer Project

http://www.eecs.umich.edu/~prabal/projects/hijack/