2014-10-01 (W) tDCS Unit

Blue felt and a metal laminated static bag were selected to be combined for making electrodes. The metal laminated material was selected since it can distribute a charger over a large area while maintaining flexibility. Any conductive material could be used in its place including carbon fiber, metal window screen, or sheet metal. Two pieces of felt were cut out at approximately 45mm x 30mm. Pieces of the metal laminate were cut to match the felt.

 Felt and static bag scraps

Felt pieces cut to size

Felt and metal laminate pieces

12mm clothing snaps were purchased to act as connectors. The stud sides of the snaps were placed between the metal laminate and felt pieces then the socket side of the snap was pressed into place. The stud and socket created a shearing action which put a hole throughout the laminate. If metal was being used as the conductive layer then solder or riveting could be used.

Clothing snap inserted through metal laminate

Thread and a sewing needle were used to fasten the laminate's shiny side to the felt. The stitches ran along the outside border. Adding stitches near the snap would have kept the snap placed better.

 Socket side of snaps attached to electrodes

Sockets removed. Homemade electrode

Bottom side of homemade electrode

The pads were saturated with salt water and put into a TENS device which emits pulses of electricity capable of stimulating muscles and nerves.
The TENS unit is shown in this project to serve as proof of conductivity through homemade electrodes not as a current source for a tDCS unit. A video was made showing muscle contractions in the left arm while holding the electrodes and TENS unit to the forearm.

 Salt water in a plastic bottle with a sprayer

Electrodes attached to TENS unit

Testing electrodes on arm. A TENS unit is NEVER to be used above the neck

 Journal Page 1

Journal Page 2

The rest of the posts for this project have been arranged by date.

A list showing of all the final posts of COMPLETED projects.

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  1. I have a lot of back and neck issues and have for years and since I hate taking medication to deal with pain and I usually don't, I tend to just suffer through it. I think the best time to use a Tens Unit is right before bed. Not only do you get the pain relief but it also helps you sleep because you and your muscles are more relaxed.


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