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Mechanical Data distribution protocol and Bus Switch example
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RJSV:
A 'simple' binary tree root structure is controlled using a mechanical bus data / address scheme, for access to remote rotary actuators.
Addressed end devices then each have two 'output port' rotary signals for unlimited use in either direction (in a session). This is a light-hearted and fun way to teach some fundamentals.
The BUS protocol defines three input wheels. The 'SELECT' wheel (SEL) is for placing new input into local position mode (or address). Then, the 'DATA' wheel can accept an address bit, zero or one, in rotary form (CW or CCW).
Finally, in the third step, a DE-SELECT input wheel is for placing the main input switch (DATA) back to 'normal mode', where signals pass through (transparent to switch internals).
DIAGRAM 1 shows a whimsical snake toy, to illustrate the mechanical bus extended across a room
Dia. 2 has BUS Organization
Dia. 3 shows motor pulses needed
Dia 4 has a internal switch workings
And Dia. 5 is picture of a planetary gear for selecting one of two shafts
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