2 ms·

> TTL-level RS-232 I ran 115k2 for a couple years directly between an atmel 8515 (sending TTL) and a Pentium2 motherboard (sending +12/-12) 24/7 for a couple y

> TTL-level RS-232 I ran 115k2 for a couple years directly between an atmel 8515 (sending TTL) and a Pentium2 motherboard (sending +12/-12) 24/7 for a couple years with no ill effects.

monocasa 5y ago
atmels are known to be tanks wrt to overvoltage protection. IMO half the success of the arduinos is that their atmel's pads can even handle children. Few chips are so tolerant.
snvzz 5y ago
Least you could have done is a voltage divider with a couple high value resistors.