Wednesday, October 22, 2014

2014-10-21 (Tu) tDCS Unit

Parts arrived from Mouser so everything was ready to assemble the first unit according to the instructions written previously. The instructions were followed and photos were taken, 84 total. Some steps were revised during the process. A list of steps to add and eliminate was made. Two steps should be eliminated and fours reps should be added from and to the manual. The photos were rotated and automatically adjusted for color. An animated image was created. The time stamps from the photos indicated it took two hours from the first photo to the last.

Animated image of steps taken in order

First finished unit

Workspace. Actually kind of a wreck

To do:
  • Add and eliminate steps
  • Take photo of Mouser parts
  • Replace placeholder images
  • Use test subject to assemble unit
  • Revise manual
  • Host workshop

Journal Page


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

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


This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.

All information in this blog, or linked by this blog, are not to be taken as advice or solicitation. Anyone attempting to replicate, in whole or in part, is responsible for the outcome and procedure. Any loss of functionality, money, property or similar, is the responsibility of those involved in the replication.

All digital communication regarding the email address 24hourengineer@gmail.com becomes the intellectual property of Brian McEvoy. Any information contained within these messages may be distributed or retained at the discretion of Brian McEvoy. Any email sent to this address, or any email account owned by Brian McEvoy, cannot be used to claim property or assets.

Comments to the blog may be utilized or erased at the discretion of the owner. No one posting may claim claim property or assets based on their post.


This blog, including pictures and text, is copyright to Brian McEvoy.

Tuesday, October 21, 2014

2014-10-20 (M) tDCS Unit

The manual steps were numbered 1-66.

Some research was done into HDtDCS where the primary difference seems to be electrodes encircle a central electrode placed over the area of interest on the scalp. This is supposed to reduce the negative effects of treatment such as reduced ability in other brain functions due to proximity to the cathode electrode. More searching was done to make a custom shape electrode which completely encircles a small electrode. A material was found which is absorbent and does not require stitching at the edges. It was a car shammy made from a gamy material. Its absorbency makes it a top candidate for electrode material. The shammy became rigid when dry but is pliable when wet.

Car shammy held out to show rigidity

To do:

  • Take photos
  • Crop and touch up photos
  • Replace placeholder images
  • Use test subject to assemble unit
  • Revise manual
  • Host workshop


Journal Page


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

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


This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.

All information in this blog, or linked by this blog, are not to be taken as advice or solicitation. Anyone attempting to replicate, in whole or in part, is responsible for the outcome and procedure. Any loss of functionality, money, property or similar, is the responsibility of those involved in the replication.

All digital communication regarding the email address 24hourengineer@gmail.com becomes the intellectual property of Brian McEvoy. Any information contained within these messages may be distributed or retained at the discretion of Brian McEvoy. Any email sent to this address, or any email account owned by Brian McEvoy, cannot be used to claim property or assets.

Comments to the blog may be utilized or erased at the discretion of the owner. No one posting may claim claim property or assets based on their post.


This blog, including pictures and text, is copyright to Brian McEvoy.

Monday, October 20, 2014

2014-10-18 (Sa) IoTHackDay

Today is a double post! On Saturday I attended IoTHackDay (Internet of Things Hack Day on FB). Most teams there consisted of two kinds of people, programmers and programmers who knew how to operate a bandsaw. Our team was a designer, an entrepreneur, a mechanically inclined person (also the tallest person in the room), the collaborator, and myself. In a sea of nerds we were the oddballs.

3/5 of the team

Our goal was to build a VR headset in 12 hours. A smart phone, my smartphone, was the core. The hard part was making a device which could hold the phone the correct distance from the user and lenses AND be small enough to fit in a pocket. Since my phone was one of the components the pictures are all courtesy of other team members. Thank you. I had a little experience making VR equipment because of the LEGO Virtual Reality Visor. While that is hardly high tech a stereoscopic viewer doesn't have to be.

 Front view of our creation

 Rear view

Side view and a photobomb by my right hand

We went through several iterations and ideas about how to finish this device ranging from a tapered sleeve idea based on collapsible drinking cups, to arrays of hinges, and an idea based on book binding techniques. In the end we arrived at a solution so simple we couldn't ignore it and used sheer nylon stretched over a frame and then the phone was pressed back into it to hold it snugly while giving it shape. Without the previous iterations we never could have arrived at the final design.

Nylon webbing stretched over a metal frame 

 3D Printed leg used to hold the phone in place. 1 of 4 legs

We got an experience unlike any other by the sheer diversity of our teammates. Our presentation was also among the most professional sounding and led by the entrepreneur who has an MBA.


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

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

No disclaimer today!

2014-10-19 (Su) tDCS Unit

Sketches were made of each module and included 1/8" (3.5mm) sockets for connecting the battery enclosure unit via a male-male 3.5mm cord and the 3.5mm electrode wires.

The first unit was a simple monetary switch which cuts power when the user released the switch. This ensures the user will not forget the turn off the unit but was designed so the user can fall asleep without leaving the unit active. It may be possible to reviser she electrodes and "quiet the brain" so the user can sleep even he or she has a lot on his or her mind.

Switch module sketch

The milliammeter module allows the user to monitor amperage levels during use and could possibly help with placement and knowing when electrodes are conducting well. This module would work well in conjunction with the adjustable current module.

Milliammeter module sketch

The adjustable current module allows the user to lower the amperage from the 2mA of the stock unit down to 0.4mA. The 20K Ohm potentiometer would be accessible from the outside of the enclosure and have markings to show where each amperage setting is according to rotation. This module would work well in conjunction with the milliammeter module

Adjustable current module sketch

The timer module used an externally powered timer to shut off the unit after a preprogrammed amount of time. This is similar in purpose to the switch module but also allows the user to concentrate on other tasks without having to worry about when to shut off the tDCS power.

Timer module sketch

These devices can be used individually or attached in series with a 3.5mm male-male cord. They can be constructed from metal enclosures which provide another path for the phone sleeve conductor.

To do:
  • Number steps in manual
  • Take photos
  • Crop and touch photos up
  • Replace placeholder images
  • Use test subject to assemble unit
  • Revise manual
  • Host workshop

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.


This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.

All information in this blog, or linked by this blog, are not to be taken as advice or solicitation. Anyone attempting to replicate, in whole or in part, is responsible for the outcome and procedure. Any loss of functionality, money, property or similar, is the responsibility of those involved in the replication.

All digital communication regarding the email address 24hourengineer@gmail.com becomes the intellectual property of Brian McEvoy. Any information contained within these messages may be distributed or retained at the discretion of Brian McEvoy. Any email sent to this address, or any email account owned by Brian McEvoy, cannot be used to claim property or assets.

Comments to the blog may be utilized or erased at the discretion of the owner. No one posting may claim claim property or assets based on their post.


This blog, including pictures and text, is copyright to Brian McEvoy.

Sunday, October 19, 2014

2014-10-18 (Sa) tDCS Unit

640x480 pixel and 1600x900 pixel images were creating listing the proportions 4:3 or 16:9 of these popular image shapes inside a thick black border. Copies of the 16:9 image were inserted into the manual as placeholders so shown photographs are taken a Replace Image can be executed. The images alter ate between the left and right side of the page to aid keeping track on paper. Page numbers did not fit within the margins and the steps are not individually numbered which is a problem since some steps refer to other steps by number.

Pages of manual

To do:

  • Number steps
  • Take photos
  • Crop and touch photos up
  • Replace placeholder images
  • Use test subject to assemble unit
  • Revise manual
  • Host workshop

Journal Page



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

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


This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.

All information in this blog, or linked by this blog, are not to be taken as advice or solicitation. Anyone attempting to replicate, in whole or in part, is responsible for the outcome and procedure. Any loss of functionality, money, property or similar, is the responsibility of those involved in the replication.

All digital communication regarding the email address 24hourengineer@gmail.com becomes the intellectual property of Brian McEvoy. Any information contained within these messages may be distributed or retained at the discretion of Brian McEvoy. Any email sent to this address, or any email account owned by Brian McEvoy, cannot be used to claim property or assets.

Comments to the blog may be utilized or erased at the discretion of the owner. No one posting may claim claim property or assets based on their post.

This blog, including pictures and text, is copyright to Brian McEvoy.

Saturday, October 18, 2014

2014-10-17 (F) tDCS Unit

The list of tools and supplies was taken to stores where discounted parts could likely be found. Three different places were visited including a surplus store, dollar store, and craft store. The purchased tools and parts were gathered and photographed. The parts were still missing the Mouser order. Prices from shopping were recorded and entered into a project notebook at twin-cities-transhumanists.org to keep others up to date and show pricing. The available photographs were cropped and color corrected with GIMP then inserted into the instruction document.

 Photograph of tools

Photograph of components

 Edited photograph of components

Edited photograph of tools

Expansion modules were a possible upgrade for the future which would allow people to build add-ons which plug into the tDCS unit and expand capalitlies. Fourmodules came to mind. An adjustable module for currents below 2mA, a milliammater usable during treatments, a momentary switch which only applies current while the user is consciously press the button, and a timer. The adjustable style unit would be the circuit already into in Adjustable tDCS and the milliammeter was built in that project with an oversized enclosure. A momentary switch was nothing more than a Normally Open switch built into a handle. The timer would have to be purely mechanical or powered externally and routed through relay. Some appropriate timers were researched on shopping sites.

To do:
  • Take pictures for manual
  • Insert pictures into manual
  • Use test subject to assemble from instructions
  • Revise manual
  • Host workshop

Journal Page


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

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


This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.

All information in this blog, or linked by this blog, are not to be taken as advice or solicitation. Anyone attempting to replicate, in whole or in part, is responsible for the outcome and procedure. Any loss of functionality, money, property or similar, is the responsibility of those involved in the replication.

All digital communication regarding the email address 24hourengineer@gmail.com becomes the intellectual property of Brian McEvoy. Any information contained within these messages may be distributed or retained at the discretion of Brian McEvoy. Any email sent to this address, or any email account owned by Brian McEvoy, cannot be used to claim property or assets.

Comments to the blog may be utilized or erased at the discretion of the owner. No one posting may claim claim property or assets based on their post.


This blog, including pictures and text, is copyright to Brian McEvoy.

Friday, October 17, 2014

2014-10-16 (Th) tDCS Unit

A document was started of the instructions. The templates was a statandeare template from a word processing application. The document was modified to fit the categories of the instructions with the longest part for the step-by-step instructions. The direction written the previous day were entered on the document and streamlined. Some steps were placed in a different order or reworded. The words BLACK and RED were capitalized and colored accordingly.

Cover page

Table of contents

Tools and parts

 Instructions page 1

Instructions page 2

To do:
  • Take pictures for manual
  • Insert pictures into manual
  • Use test subject to assemble from instructions
  • Revise manual
  • Host workshop

Journal Page


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

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


This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.

All information in this blog, or linked by this blog, are not to be taken as advice or solicitation. Anyone attempting to replicate, in whole or in part, is responsible for the outcome and procedure. Any loss of functionality, money, property or similar, is the responsibility of those involved in the replication.

All digital communication regarding the email address 24hourengineer@gmail.com becomes the intellectual property of Brian McEvoy. Any information contained within these messages may be distributed or retained at the discretion of Brian McEvoy. Any email sent to this address, or any email account owned by Brian McEvoy, cannot be used to claim property or assets.

Comments to the blog may be utilized or erased at the discretion of the owner. No one posting may claim claim property or assets based on their post.


This blog, including pictures and text, is copyright to Brian McEvoy.