Proximity Sensor V2
author: Ritwik
2 layer board of 1.22 x 1.19 inches (31.0 x 30.1 mm)
Uploaded:
March 22, 2019
Shared:
March 22, 2019
Total Price:
$7.20
Tunable IR based proximity sensor with a digital output
- Autodesk Eagle .brd and .sch files included with all non-standard libs
- Sample Arduino Code also included
- Potentiometer used to adjust the range
- Detection range of about 9cm (3.5 in)
Important Notes:
- The 220 Ω resistor is a pull-up in parallel with the LED. The LED needs to be one with an internal resistance (Standard RED 5mm LED with internal resistance is recommended)
- The board has a normal HIGH and triggered LOW. The LED will be ON when the sensor hasn’t been triggered and will turn OFF when it has.
BOM:
| Part | Part no. | Quantity |
| IR Reflective Sensor | TCRT 5000 | 1 |
| Red LED (internal resistor) | 1 | |
| 100 ohm Resistor | 1 | |
| 220 ohm Resistor | 1 | |
| 4.7k ohm Resistor | 1 | |
| 10k Multi-turn POT | 1 | |
| 0.1uF Ceramic Capacitor | 2 | |
| TL081 op-amp | TL081 | 1 |
| LM311N op-amp | LM311N | 1 |
| Break Away Headers | 6 |
Schematic
Prototype Board
BreadBoard based testing
Tunable IR based proximity sensor with a digital output
- Autodesk Eagle .brd and .sch files included with all non-standard libs
- Sample Arduino Code also included
- Potentiometer used to adjust the range
- Detection range of about 9cm (3.5 in)
Important Notes:
- The 220 Ω resistor is a pull-up in parallel with the LED. The LED needs to be one with an internal resistance (Standard RED 5mm LED with internal resistance is recommended)
- The board has a normal HIGH and triggered LOW. The LED will be ON when the sensor hasn’t been triggered and will turn OFF when it has.
BOM:
| Part | Part no. | Quantity |
| IR Reflective Sensor | TCRT 5000 | 1 |
| Red LED (internal resistor) | 1 | |
| 100 ohm Resistor | 1 | |
| 220 ohm Resistor | 1 | |
| 4.7k ohm Resistor | 1 | |
| 10k Multi-turn POT | 1 | |
| 0.1uF Ceramic Capacitor | 2 | |
| TL081 op-amp | TL081 | 1 |
| LM311N op-amp | LM311N | 1 |
| Break Away Headers | 6 |
Schematic
Prototype Board
BreadBoard based testing
