The Blind Controller currently operates up and down blind movements based on calibrated times. This works fine most of the time but does require some patience to set-up and over time can drift resulting in the blinds over or under shooting their intended end point.
To solve this I have been working on a magnetic sensor that attaches to the accessory slot and requires only two small attachments to either end of the blind cord. The designs for these are available from thingiverse here. As well as the 3D-printed attachment you will also need the following:
The 3D Design:
The sensor in place:
The provisional Arduino script is available to download here for those of you who are keen.
Next up: Some housing for the sensor module and a generally ‘neater’ solution.