On 7/31/11 1:11 PM, anton andersson wrote:
Hi Everyone I'm building a multiplexed Nixie clock with an Atmel XMEGA256A3B for brains and a K155ID1 as cathode decoder/driver. The problem is that the XMEGA is modern and wants 3.3V supply while the K155ID1 needs 5V.
Supply the CPU with 3.3V and the TTL chip with 5V, and wire the signals direct. It will work just fine, as TTL is really a 3.3V logic family, with a 5V power supply.
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