Stimulator Designs

This page supplements Land BR, Johnson BR, Wyttenbach RA, and Hoy RR (2004) Tools for physiology labs: Inexpensive equipment for physiological stimulation. J. Undergrad. Neurosci. Ed. 3(1):A30-A35. Download a pdf here.

General Info About Building Circuitry
There are many web sites teaching design and construction of electronic circuits. These are a few, concentrating on construction, that you may find useful:
Kelsey Park School Electronics Club (good info on soldering, handling of components, etc.)
Electronix Express links page (construction tips, links to other sites)

Stimulus Isolation Unit
PC board (see note below); part list.

Analog Pulse Generator
PC board (see note below); part list.

Microcontroller Pulse Generator
PC board (see note below); part list; ATMEL code; MatLab GUI code; alternate circuit with amplitude control.
For more information about the microcontroller and for downloadable software to program the chip, see the ATMEL web site.
For links to sellers of the hardware to burn the ATMEL code into the controller chip, see this page on the ATMEL site. All vendors listed give a price of $79 for the kit, which can be used to produce any number of programmed chips. We have generally had good experience with DigiKey.
(Note: some figures in our paper may refer to the AT90s8515 rather than the ATmega8515. The two chips are substantially the same, but the ATmega8515 is the currently available version.)

PC Board Note
These files are meant to be used with Windows software from so that you can have them make your PC boards. Each board fits ExpressPCB's inexpensive "miniboard" format. This is the least expensive way that we have found to have small quantities of PC boards made.


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