Hardware

The basic hardware requirements

Parts List

QTY	item
1 ×	Arduino Uno
	Wires
	Amplifier
1 ×	LM358N Op Amp
2 ×	1 KΩ resistors
1 ×	220 KΩ resistor
1 ×	1 MΩ resistor
1 ×	240 µF capacitor
1 ×	10 Ω - 2 MΩ trimpot (Bourns 3386)
1 ×	1N4001 diode
	Sensor
1 ×	0.6 mm Range Piezo Bender Actuator
1 ×	blunted 24 G needle
	Water Delivery / Air Puffer
2 ×	24 V DC Solenoid pinch valve PS-1615NC
2 ×	MOSFET RFP30N06LE
2 ×	1N4001 diode
2 ×	10 KΩ resistors
	Speaker
1 ×	speaker 8Ω 2W
	Stimulus
1 ×	LRA 8mm (precision microdrives)
	BNC headers

Wiring of the Amplifier

Wiring Solenoids

The air puffer and water delivery system can both be constructed with the following circuit. This circuit is described in this blog post from bildr.

Both the air-puffer and water delivery system can be constructed using solenoid pinch valves. The valves listed above require 24 V DC power supply, which exceeds that supplied by the Arduino logic pins. This circuit uses a MOSFET (RFP30N06LE) to gate the solenoid. A 10 KΩ resistor and diode (1N4001) are included to prevent voltage surges from shorting the Arduino.

Wiring the Arduino

The following table outlines the wiring of the Arduino for the program in this repository. This indicates the power / signal lines only. Each of these connections also needs to be wired to the Arduino ground. As the Uno only has 3 GND pins you have to make an additional set of headers to wire into.

pin	Physical connection
D3	short recording trigger (10ms TTL pulse )
D4	full trial duration signal (bulb style trigger)
D5	Connect to Stimulus device, outputs a variable duration pulse
D6	Connect to punishment device, (TTL trigger)
D7	output to auditory cue speaker
D10	Connect to water valve gated power supply
A0	The Piezo Amplifier is connected to the analog input
5V	Connect to the power input (5V) of the Piezo linear Amplifier

Table: connections