Safety Warning

If you are considering buying this item, you probably already know all this but in the interest of your safety, we feel compelled to state all this clearly. So take a few minutes to read it carefully before buying.

Do not attempt to interface to mains unless you have adequate training and access to appropriate safety equipment. In certain jurisdictions it may be illegal to work with mains voltage unless you are properly qualified. Also be aware that the use of this Module may affect your house insurance in the event that something goes wrong.

Never work on high voltages when you are alone by yourself. Always ensure that you have a friend/partner who can see and hear you and who knows how to quickly turn off power in case of an accident. Use a 1A Fuse in series with the input to the Module as a safety measure.

Fire Hazard: Making wrong connections, drawing more than rated power, contact with water or other conducting material, and other types of misuse/overuse/malfunction can all cause overheating and risk starting a fire. Test your Module and the environment in which it is deployed thoroughly before leaving it switched on and unsupervised. Always follow all fire safety precautions.

Electrical Safety and Disclaimer

Our Module may be inconsistent with current laws or user agreements in certain countries, or may damage or adversely affect some equipment.

Your safety is your own responsibility, including proper use of equipment and safety gear, and determining whether you have adequate skill and experience. If you are a younger person or are inexperienced with electrical devices, ask for help from a parent, teacher or other knowledgeable person.

Princeton University has an excellent page on Electric Safety here: You should view and understand that page before attempting any project or use of power control devices that use or control voltages above 40 Volts AC or DC.


You must accept that You and You Alone are Responsible for your safety and safety of others in any endeavor in which you engage. While the material on this site is provided in good faith, You are Responsible for verifying its accuracy and applicability to your project. You are Responsible for knowing your limitations of knowledge and experience. If you do any work with "mains power" such as 120 or 240 VAC power wiring, you should consult a Licensed Electrician.

Some illustrative photos and videos do not depict safety precautions or equipment, in order to show the operation more clearly. Our Module is for the use of adults only and is not for children. Use of these instructions, kits, projects and suggestions is at your own risk. We disclaim all responsibility for any resulting damage, injury, or expense. It is your responsibility to make sure that your activities comply with applicable laws.

If you feel uncomfortable with assembling or operating our Module, simply contact us to return it for a full refund.

Our device must only be used to operate non-critical equipment. Do not use the Module to control a life support system or any other application where unintended operation might harm people or damage property.