Breakout

The Harp Behavior Breakout is an interface peripheral for the Behavior board. It makes the pins of the Behavior board peripheral ports available on screw terminals without having to build a custom cable. Refer to the connections article to set up the peripheral and the Read Digital Inputs, Control Digital Outputs, or Stream Timestamps articles to use it in Bonsai.

Left: Breakout v1.1. Right: Breakout v2.1.

Key Features

• Supports 12 V solenoid valves (e.g. Lee LHD series) (v1.1 only).
• Supports serial timestamp output, with the logic level selected by the onboard jumper (v2.x only).

Note

Pick the board version by the feature you need. Both features are not available on the same board as they share the same port line.

Specs

Ports:

• 1x Digital Input (DI)
• 1x Digital Input / Output (DIO)
• 1x Digital Output (DO)
• 1x 5 V supply (+5V)
• 1x Ground (GND)
• 1x 12 V supply (+12V) (v1.1 only)
• 1x Supply return (compatible for +5V and +12V) (SUP_RTN) (v1.1 only)
• 1x Serial TX (v2.x only)

For connection with a quadrature encoder:

Quadrature Encoder Pin	Breakout Board Pin
A	DI
B	DIO
Supply	+5V
Ground	GND

Hardware

Version	Compatible Behavior Board	Notes
2.x	> 2.0	Serial TX terminal replaces the +12V and SUP_RTN terminals TX logic level jumper-selectable between 3.3 V and 5 V
1.1	> 1.2	Initial version

Assembled units are available from the Open Ephys store, or build your own using the hardware design files in the Breakout repository.

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Last updated with:
Hardware v2.1
Firmware v3.3
Bonsai Package v0.2