746-compact-compatible-board

An open source compatible board for the 746 compact

GitHub of the project

The idea

Idea came out when my automatic sliding gate stopped working.

After some analisis I found out that the controlling board was broken.

Now it is impossible to find a new replacement of this old board, which FAAC discontinued, so I decided to make one myself.

I/O information

• The high voltage part has been projected preserving functionality and safety, from the original board;
• The low voltage/contols part of the board has been completely reworked to use an Arduino Nano as controller;
• For the inputs I used some optoisolators to adjust the 24V of the sensor to the 5V of Arduino.
• The motor is controlled by three relays to:
• open the gate;
• close the gate;
• brake the gate in position;
• The relays are driven by an integrated circuit, to adjust the 5V of arduno to the 24V of relays.

Differences from the original

• You can connect the radio control board, directly to the main board;
• the original manufacturer let this tiny board float into the case;
• There are more screw connectors, than the original, to connect easily the board with the sensors and the motor with its capacitor;
• Now the board is bigger, but still fits my case;
• If the gate is taking too much time to open/close completely, before a configured time, the board stop the movement, to preserve the motor;
• There are some jumpers for future software expansion, now one of them make you choose if the gate should close by himself;
• There is a software program to check if infrared photocell is wotking correctly, if not the board disable the opening/closing of the gate.

Future expansions

• Create a program to measure automatically the time to open/close completely the gate, using one of the configurable jumpers.

License

This entire project is shared as it is, so I am not responsible for any damage to people, animals, things or anything else.

So use it at your danger.

Photo of the Board

Top Layout

Inner 1 Layout: for safety reasons the isn't part of the copper area under the 230V zone

Inner 2 Layout: for safety reasons the isn't part of the copper area under the 230V zone

Bottom Layout

Board in action