Internal clock in the sumo-bot

Juerg

The sumo competition rules in Switzerland·say that after 85 seconds the sumo roboter has to stand still, i.e. to shut itself down.
I hope that somebody has a good idea how to program an internal clock in the sumo's basic wrestler program.

Thanks for any help

Juerg

Franklin

If all it needs to do is stop and not move again you could build a simple timer with a 555 chip that would remove power after the set time.

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- Stephen

Juerg

Stephen

thank you for the idea.

Perhaps you see a different approach without a 555-chip.
Actually I only want to implement a couple of program steps, something like a "GOSUB".
On the other hand, I've never programmed a 555-timer-chip and that's why I don't have a clue how to do it.

Juerg

Mike Green

1) You do not program a 555 timer. This chip works by charging or discharging a capacitor through a resistor and detecting when the voltage across the capacitor rises above or drops below a fixed threshold. Do a websearch for "555 timer" to find datasheets and many sample designs.

2) The Stamp used in the Sumo-Bot does not have an internal clock. It does have an internal oscillator and uses that for determining timing for statements like PULSOUT and PAUSE, but there's no cumulative time unless you build it into your program.

Juerg

Mike
Thank you for all of that.
I'm going to give it a try with the NE555.

Juerg