2014-10-09 (Th) Adjustable tDCS

Stocked parts were gathered to construct an adjustable milliamp current supply. A resistor, 50 Ohm potentiometer, and female phone socket were purchased for the trial circuit. An LM334Z was ordered. The trial circuit was not meant to have all the features of of the full build. There was no built-in milliammeter and the current regulator was adjusted by a hex wrench inside the enclosure. The circuit was built without the LM334Z which had not arrived. An indicator LED and resistors were added to the circuit on a whim.

 Parts gathered from stocked components

Components soldered according to schematic

Three 1/4" (6.25mm) holes were drilled into the side of an Altoids tin for mourning components. A toggle switch, LED, and 1/8" (3.5mm) phone socket were mounted to the side. The other components were kept loose inside the enclosure since the LM334Z was not stocked. A hex key was included with the project to adjust the potentiometer. A revolving picture was taken with the Rotational Photography Rig.

 Holes drilled in Altoids tin

Components mounted in tin

Spinning tin

The schematic was updated to show the LM334Z current regulator as a top-down representation of a T0-92 case with labeled pins.

Updated schematic

To do:
  • Create part list with links
  • Add LED and resistor to part list
  • Add LED and resistor to schematic
  • Add electrode wires and electrodes to part list
  • Collaborate with twin-cities-transhumanists
  • Install LM334Z
  • Test and verify for safety

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.

Comments