Let's Make Robots!

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RobotFreak's picture

This is a cool gadget to give every robot a face. Remembers me on Mr. Jones Tengu.

ArunioSmo's picture

This is very good projeckt for my son "michi 2000". Have you yet video?

MarkusB's picture

Not yet :)

Geir Andersen's picture


This is probably a stupid question, but what are the diodes D12-D19 for?

Nice project by the way :-)

TeleFox's picture

Looks like some good ol' fashioned diode logic - if pin2 on the decade counter is brought high for example, then diodes 13 and 14 will allow transistors Q2 and Q3 to turn on, but diodes 15, 17 and 18 will prevent Q4 from accidentally being turned on. The remaining diodes also stop current flowing from pin2 back into pin2 3, 4 and 7, which will often be low if pin2 is active.
The same sort of thing happens when the other decade counter pins are active.

Cool project Markus, good use of the decade counter as an I/O expander =D