Vizy has a terminal block connector that gives you lots of I/O possibilities, with high-current output for controlling motors, solenoids, relays, lighting (and even sprinkler valves!)

More information about powering Vizy can be found here.

1. Ground
2. 12V: software controllable on/off 12V source at up to 4A.
3. 5v: software controllable on/off 5V source at up to 4A.
4. B0: bit 0 input/output, can sink up to 1000mA
5. B1: bit 1 input/output, can sink up to 1000mA
6. B2: bit 2 input/output, can sink up to 1000mA, serial output
7. B3: bit 3 input/output, can sink up to 1000mA, serial input
8. Ground

• As inputs, B0 through B3 can each accept up to 12V input voltages (not to exceed input power voltage, which is typically 12V.)
• As inputs, B0 through B3 can each accept 5V TTL voltages.
• As inputs, B0 through B3 each have 1.3V of hysteresis: the low-to-high threshold is 2.3V, the high-to-low threshold is 1.0V.
• As inputs, B0 through B3 each have a 22K pull-up resistor to 3.3V.
• As outputs, B0 through B3 each vary between 0V (low) to 3.3V (high).
• As “high power” outputs, B0 through B3 can each sink up to 1000mA, which applies during logic low (0V). Exceeding 1000mA may cause damage to Vizy's power board. Each channel can source up to 5mA, which applies during logic high (3.3V).
• The maximum carrying current of the 12V signal is 4.0A. Exceeding 4.0A may cause damage to Vizy's power board.
• The 5V signal can source up to 2A.
• All I/O connector signals are protected from electrostatic discharge.

Using the terminal blocks is easy!

1. Start by opening the clamp (loosening) the screw in the terminal block. Use the screwdriver that came with your Vizy. Note, the Vizy screwdriver is reversible. One side is phillips, the other side is standard. You want to use the standard side.
2. Insert the wire into the opening.
3. Tighten the screw.
4. Repeat for other wires.
5. Insert the terminal block into Vizy.

The Vizy applications, such as the birdfeeder application, use specific pins of the I/O connector to control things such as lights, motors, relays, and sprinkler valves.

If you wish to control the I/O signals with your own code, check out the Power Board API.