Wall Mounted Arduino Housing with LCD and Switch

This is a temperature controlled/switch controlled servo for primary use as an automatic HVAC damper switch.

TinkerCAD for electronics and code: https://www.tinkercad.com/things/0S342YWoXd1?sharecode=c5gJuX8IBHWTbQRgcOGsQh9mVybTqhOPt555Da2XERs 

Specific parts for this project:

TMP36 temperature sensor

SG90 9g servo

This switch: https://www.amazon.com/DIYhz-50Pcs-Solder-Position-Switch/dp/B0799R529Z/ref=pd_ybh_a_sccl_114/142-5479419-6266918?pd_rd_w=nBBPg&content-id=amzn1.sym.67f8cf21-ade4-4299-b433-69e404eeecf1&pf_rd_p=67f8cf21-ade4-4299-b433-69e404eeecf1&pf_rd_r=NEJCE5T8JB8JQT10DWJY&pd_rd_wg=691j8&pd_rd_r=14c62ae9-27d1-4a87-b8b3-fe54ea3b497c&pd_rd_i=B0799R529Z&psc=1

This LCD:

https://www.amazon.com/SunFounder-Backlight-Raspberry-Character-Background/dp/B071Y6JX3H/ref=pd_ybh_a_sccl_112/142-5479419-6266918?pd_rd_w=nBBPg&content-id=amzn1.sym.67f8cf21-ade4-4299-b433-69e404eeecf1&pf_rd_p=67f8cf21-ade4-4299-b433-69e404eeecf1&pf_rd_r=NEJCE5T8JB8JQT10DWJY&pd_rd_wg=691j8&pd_rd_r=14c62ae9-27d1-4a87-b8b3-fe54ea3b497c&pd_rd_i=B071Y6JX3H&th=1 

Assembly:

Insert Arduino (Please break off the two pins closest to the hole for ports. The Arduino does not fit in without doing so.)

Attach wiring

Clip on perf board

Attach LCD and switch (LCD may require a small amount of CS glue)

Attach LCD to box (Be sure to run the wire to the servo out the side of the box and make it long enough to get to the damper. You may want to add connectors for this part so that it can be moved.)

Mount box (Wood screws work fine, holes can be drilled to adjust)

Adapter assembly:

Screw “lock” onto servo over top a servo saver

Force fit “key” into lock

Attach “key” to damper control

Mounting the servo:

This can be done as the user sees fit, directly over the damper control.

This is a helpful file for mounting (not mine): https://www.printables.com/model/301229-sg90-servo-mount/files 

Disclaimer:

This was mostly just a fun project that I figured could help some people out who were looking for a DIY solution to adjusting HVAC dampers based on temperature. I may or may not update this in the future to make it better. By using this project and files, you agree to not hold me liable for any damages sustained to yourself or any property. I have only tested this a bit (It has been ok so far), so if something goes wrong, please let me know so I can warn people/update the project, but know I hold no responsibility for this project causing problems. Use at your own risk. Also please respect the license on this project.

Copyright Harmless Technology 2023