mattudakis/ttl_box

3D printable TTL box with BNC output for arduino

3D printable TTL box for arduino

3D printable TTL box to interface between python/matlab via arduino with BNC connection outputs to trigger experiment contingencies. Included are 3D models created using Fusion 360 and 3D printing .stl files.

 

Use case: miniscope TTL and solinoid box

An example use case is interface between a matlab/python script that tracks animals live position and both 12V solinoid valves and inscopix miniscope equipment via BNC cable delivered 5V TTL pulses. Experiments required live position tracking of lab animals on a track. If certain zones of the track were occupied an automatic liquid reward would be delivered via opening of a solinoid valve. In addition the animals position within another zone would trigger optogenetic activation communicated via a TTL pulse to inscopix equipment.

 

How to

1. Required components
2. Solinoid circuitry
3. 3D printing and assembly

---

Components needed

Component	Description	Source	Reference	Quantity
Arduino uno	Arduino microcontroler	Online		1
Solinoid valves	12V solinoid valves	cole-parmer	98302-02	2
BNC connectors	Male BNC connectors to allow connection with BNC cables	RS	546-4910	4
TIP120 Transistor	Transistor for solinoid circuit	RS		2
1N4001-T Diode	Diode for solinoid circuit	RS		2
1KOhm Resistor	Resistor for solinoid circuit	RS		2
Circuit stripboard	Strip board to essemble solinoid circuit	RS		1
DC jack connector	5.5 X 2.1mm DC power Jack	RS		1
Capacitor	100uF 50V for power surge protection	RS		1
Wire	Wire to connect components	RS		1
Wire terminal strip	Terminal strip to connect solinoids to TTL box	RS		4
3D printer	3D extrusion printer to fabricate case			1
3D printer filament	PLA 3D Printer Filament	RS		1

 

Solinoid circuitry

 

3D printing and assembly