One correction: at Vdd=5V (4066), the channel resistance is more likely 200..1000 ohm (depending on type and manufacturer), rather than 1..200 ohm which'd only apply at Vdd=15V; sorry. On 2015-10-26 23:09, HÁRSFALVI Levente wrote: > The 4066 merely contains CMOS transfer gates - that is, simple switches > whose series resistances (when open) are in the order of some 1-200 > ohms. There are no buffers in the 4066. In the theoretical experiment > below, the open 4066 gate could just be substituted by a regular 1..200 > ohm resistor. > > > On 2015-10-26 22:03, Leif Bloomquist wrote: >> What happens if both sides of a 4066 channel are connected to an >> output though? (since it's possible to configure both the Arduino >> and CIA as outputs). >> >> >> >> On Sun, Oct 25, 2015 at 1:17 PM, Gerrit Heitsch >> <gerrit@laosinh.s.bawue.de> wrote: >>> On 10/25/2015 06:05 PM, Leif Bloomquist wrote: >>>> >>>> >>>> I looked into buffers but was unable to find a through-hole >>>> *bidirectional* buffer, so I'll stick with this approach unless >>>> someone has a different solution? >>> >>> >>> How about a 4066? Yes, it's a switch, but if you just tie the Enable >>> signal >>> to +5V it becomes a buffer. If it's fast enough for controlling >>> access to >>> the color RAM in the C64, it should be fast enough anything I/O-related. >>> >>> Gerrit >>> >>> >>> >>> >>> Message was sent through the cbm-hackers mailing list >> >> Message was sent through the cbm-hackers mailing list >> > Message was sent through the cbm-hackers mailing listReceived on 2015-10-26 23:00:47
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