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Totem MiniLab
running voltage for it. A selector switch on the TotemDuino board can set the supply
voltage for the TotemDuino microcontroller either at 5 or 3.3 volts. This allows you to set
the logic level interfacing with various external equipment that could only be used at one
of these voltages without any additional voltage level converters. Refer to TotemDuino
section for explanation on how to set the voltage.
Voltages that are available to use are:
• 12 V, 1.0 A — direct supply voltage,
• 5 V, 0.5 A — regulated supply voltage, shared with TotemDuino,
• 3.3 V, 0.25 A — regulated supply voltage, shared with TotemDuino and LabBoard
processor,
• -5 V, 0.5 A — separate regulated voltage, for experimentation with operation amplifiers,
• 0..3.3 V programmable regulated voltage output, up to 0.35 A.
A power supply schematic is provided for reference:
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Fig. 4 Power regulators in MiniLab
It is possible to run only from USB power, but in that case modules relying on higher
voltage, such as programmable regulator will not be available.
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