This simple USB HID device is connected up to a shift register which is used to control a number of LED outputs. It proves the principle of using the shift-register as a serial-to-parallel interface. Data is sent from the PC via USB to the PIC microcontroller, which in turn clocks serial data into the shift register.
The shift register displays a series of 8 bits, as received on the serial line, on the output pins. We're simply showing the state of the output pins by connecting a surface mount LED
Thursday, 12 July 2012
Saturday, 7 July 2012
Scalexercise at BuildBrighton
Here's Other Chris and Mike at BuildBrighton Hackspace, testing the Scalexercise racing cars for the Dublin Mini MakerFaire.
A few tweaks here and there may be needed for the final version, but as a proof-of-concept, it's looking really exciting. Pedal faster and the car zooms around the track.
Braking is proving a bit of a sore point, at the onboard mcu effectively has to wait for a timeout from the exercise machine before reducing speed which is why there's a delay between stopping pedalling and the car stopping.
Perhaps it's time someone fitted a brake to an exercise machine?
A few tweaks here and there may be needed for the final version, but as a proof-of-concept, it's looking really exciting. Pedal faster and the car zooms around the track.
Braking is proving a bit of a sore point, at the onboard mcu effectively has to wait for a timeout from the exercise machine before reducing speed which is why there's a delay between stopping pedalling and the car stopping.
Perhaps it's time someone fitted a brake to an exercise machine?
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