BarBot/Components/Stirrer: Difference between revisions
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Sorry Mr Bond, our BarBot cannot do a shaken Dry Martini! | Sorry Mr Bond, our BarBot cannot do a shaken Dry Martini! | ||
The BarBot stirrer consists of a "swizzler" attached to a recycled printer carriage mechanism. The carriage and swizzler motors are controlled by a ATtiny85 and L298N dual H-bridge. The cycle is started by grounding the /RESET input of the ATtiny85. It then lowers, swizzles, lifts a little, shakes off the drips, then raises to the top ready for next time. | The BarBot stirrer consists of a "swizzler" attached to a recycled printer carriage mechanism. The carriage and swizzler motors are controlled by a ATtiny85 and L298N dual H-bridge. There is a 10R 15W resistor in series with the swizzler motor, to reduce the voltage. The cycle is started by grounding the /RESET input of the ATtiny85. It then lowers, swizzles, lifts a little, shakes off the drips, then raises to the top ready for next time. | ||
[[File:20140627 160043 resized.jpg|none|600px|BarBot Stirrer]] | [[File:20140627 160043 resized.jpg|none|600px|BarBot Stirrer]] | ||
Revision as of 23:15, 1 July 2014
Stirrer
General Description
Sorry Mr Bond, our BarBot cannot do a shaken Dry Martini!
The BarBot stirrer consists of a "swizzler" attached to a recycled printer carriage mechanism. The carriage and swizzler motors are controlled by a ATtiny85 and L298N dual H-bridge. There is a 10R 15W resistor in series with the swizzler motor, to reduce the voltage. The cycle is started by grounding the /RESET input of the ATtiny85. It then lowers, swizzles, lifts a little, shakes off the drips, then raises to the top ready for next time.
Notes:
- Watch out for the shake!
Mounting & hardware
The printer carriage mechanism has a few holes that can be used for mounting. It needs to be positioned such that the swizzler is in the liquid when it is at it's lowest point.
Logical
To start the cycle the /RESET line of the ATtiny85 needs to be taken low. One cycle takes approx 16 seconds to complete.
Connections
- +12V
- Ground
- /RESET ("start" signal)
Power
+12V, TBC mA
Bling
None really! However, there is a red LED on the L298N module which illuminates when power is available.