OptoInterrupterShield V2 for ProMini PiDuino HAT
author: dewhisna
2 layer board of 2.11 x 2.23 inches (53.5 x 56.7 mm)
Uploaded:
October 08, 2017
Shared:
November 09, 2017
Total Price:
$23.45
The Optical Interrupter Shield V2 board, for ProMini PiDuino HAT, was designed to interface four off-the-shelf optical reflective sensors, such as my QRE1113 Sensor Board, used in raw-sensor mode, to a Raspberry Pi via an Arduino ProMini PiDuino HAT. This board expands on the V1 design with a better on-board debouncing circuit and four sensor inputs instead of only two. It also adds level-shifters to work with either 5V or 3.3V, as driven by the I/O Ref voltage pin.
ERRATA: To work better with the QRE1113 sensor, as this board was originally designed to do, change R3, R9, R15, and R21 from 10K to 47K. This change is necessary to boost the gain of the QRE1113 sensor by about five times, which is needed to get the sensor out of the linear region and into the switching region of operation. Without that change, the sensor will lack enough sensitivity to function adequately for use in the quadrature encoder application it was intended (and probably most any other application too).
The Optical Interrupter Shield V2 board, for ProMini PiDuino HAT, was designed to interface four off-the-shelf optical reflective sensors, such as my QRE1113 Sensor Board, used in raw-sensor mode, to a Raspberry Pi via an Arduino ProMini PiDuino HAT. This board expands on the V1 design with a better on-board debouncing circuit and four sensor inputs instead of only two. It also adds level-shifters to work with either 5V or 3.3V, as driven by the I/O Ref voltage pin.
ERRATA: To work better with the QRE1113 sensor, as this board was originally designed to do, change R3, R9, R15, and R21 from 10K to 47K. This change is necessary to boost the gain of the QRE1113 sensor by about five times, which is needed to get the sensor out of the linear region and into the switching region of operation. Without that change, the sensor will lack enough sensitivity to function adequately for use in the quadrature encoder application it was intended (and probably most any other application too).
