Synopsis: Over the past weekend, I spent the time to take the sensor analog and digital interrupt logic off the breadboard and onto a more semi-permanent perf board. In the process, instead of a single sensor circuit which I’ve been using on the breadboard, this perf board incorporates all the circuitry for 4 sensors ( hand and foot X 2 lanes.) This perf board implements the schematics in Part 5 of this series with one exception...I added 4 LED indicators through another driver to show on-board when a sensor “fired” due to a touch.

Also, in this article are a couple of movies that show a single-sensor alpha test on a climbing wall.

2 Lane, 4-sensor Perf-Board

Here’s a picture of the perf-board that contains the sensor detection and microcontroller interrupt logic for a two-lane speed climbing system. The microcontroller is on a separate board. The schematics for this board can be found in Part 5 of this series. The 4 orange potentiometers on the upper left of the board are there to adjust the sensor sensitivity.



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Tags: Schematics, IR Sensors

I took a short break from the prototyping workbench to catch up the project documentation. This one in the form of schematics. Using Eagle, I created a short set of schematics focused on various subsystems of the speed climbing timing system.

They are:

1. IR Sensor and Interrupt Logic
2. Power Regulation
3. Microcontroller Interfacing
4. RJ45 pinouts for the Modular Connections

I won’t spend much time explaining the schematics. They could well change as I get further into this.

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Tags: Schematics, IR Sensors