Warning: ksort() expects parameter 1 to be array, object given in /home/bradspro/public_html/wp-content/plugins/bbpress/includes/core/template-functions.php on line 316
Toaster – The Dual Rail Step Up Breadboard Power Supply | {Brads Electronic Projects}

Toaster – The Dual Rail Step Up Breadboard Power Supply

By brad, March 11, 2016

Toaster is dual output USB step up power supply module designed to fit snuggly into a breadboard. It is powered by a single 5V USB port or charger and outputs three voltages simultaneously, these being 3.3V, 5V and a variable supply which is capable of 5V to 16V. I am currently running a Kickstarter campaign for Toaster which you can feel free to check out here: Toaster on Kickstarter

The Kickstarter campaign has now ended and ended up doing really well. Thank you to all the backers!

NOTE: Downloads are at the very bottom of this page.

The Story

Toaster came about when I wanted a simple breadboard power supply that could power my standard 3.3V / 5V digital circuits such as a microcontroller, but would also be able to run some analog circuitry at the same time. Since most breadboards these days seem to have dual supply rails, I decided to make something to fit the need and so Toaster was born!

Toaster is simple to use, simply plug it into your breadboard and then into a USB port or charger. Toaster will then provide you with a selectable 3.3V / 5V power supply rail plus another supply rail which is variable from 5V all the way up to 16V. All from a single 5V source!


Output Voltage 1 – Selectable between 3.3 Volts or 5 Volts


Output Voltage 2 – Variable Between 5 Volts and 16 Volts


Standard Dual Rail Breadboard Connection 


Toaster uses a really neat piece of electronics called a DC to DC converter which allows a smaller voltage to be boosted up to a larger voltage. In this case, the 5V input from the USB port can be boosted anywhere up to 16V. Fantastic for powering all sorts of analog circuits! This voltage step up does come at a cost however, the higher the voltage that you want, the more current the Toaster needs to draw from the USB port to achieve that voltage. Check out the table below to see the maximum current for each voltage setting.

Maximum Output Current Figures




  • Input Connection – USB Mini B and USB Micro
  • Input Voltage – 5Volts
  • Input Current (max) – 1Amp
  • Output Voltage 1 – Selectable 3.3 Volts or 5 Volts
  • Output Voltage 2 – Variable 5 Volts to 16 Volts
  • Protection – 1.1Amp Resettable Fuse
  • Output Connection – Standard Dual Rail Breadboard 2.54mm (0.1″) Spacing.
  • Board Dimensions 50mm x 25mm


The following zip file contains the bill of materials, pcb and schematic design files and also gerber files. You will need DIPTRACE to view and edit the design files.

Toaster 1.0 Files (286 downloads)

You can also download the Fritzing ‘virtual’ Toaster here:

Toaster Fritzing Design (193 downloads)


  1. Yuri Halberstadt says:

    Simply beautiful!

  2. Henk the Knife says:

    What the Hell did Kickstarter do?
    Got some E-Mail where i should answer a qeustion from you

    … but i can nothing do.

    The same shit with “Bela”

    What stupid People work at KICKSTARTER

    • Brad Slattery says:

      I’m not exactly sure what you’re talking about. Did you back the Toaster? If so, can you tell me your kickstarter username so I can check my backer list?

  3. Bruce says:

    What software do you use for schematics and layouts? I’ve never seen the .dip and .dch extensions before.

  4. brad says:

    Hi Bruce, if you have a look just above the download link there are some details about DIPTRACE which is the software required to view / edit the PCB design and schematic files.

  5. Myrna says:

    Excellent beat ! I would like to apprentice at the same time as you amend your website,
    how can i subscribe for a blog web site? The account aided me a applicable deal.
    I were a little bit familiar of this your broadcast
    provided vibrant transparent concept.

  6. Ross McKenzie says:

    Hi Brad,

    Could I ask you to output your schematic in pdf format please? I use Eagle and have no interest in installing Diptrace just to be able to view your schematic. Hope you understand.



  7. brad says:

    Hi Ross, the download link already has a PDF version of the schematic as well as gerber files so you won’t need to download DIPTRACE if you don’t need to.

  8. lfsternn says:

    Awesome project!!! Are there any more of the Kickstarter Toasters for sale or via donations, the pledge/donation links on Kickstarter are not valid/working any more. Thanks. LFSternn…

  9. Steve Holden says:

    Just put my first breadboard together and looking forward to having this board meet my computers. If you are soldering your own pins, use a large-ish iron – the warnings about the heatsinking effects of the ground-plane are well-founded. Very happy with both design and build quality.

  10. Leon says:

    So I cannot order the product any more?

  11. Will says:

    Hi Brad,
    Very happy to have received my toaster, really helpful. One question I do have is about th e 3V/5V switch. I dont have one on my board so does that mean both 3V and 5V are available?


  12. brad says:

    Sorry for the late replies here guys.

    @Leon – I don’t have any for sale at the moment but will in the future. I’ll post here when I do.

    @Will – The switch was removed and now you have access to both 3.3V and 5V at the same time 🙂

  13. Gary Levin says:

    The Toaster is proving extremely useful with all the LED lighting projects that I am working on. I can get the 12volts that I need along with the 3-5volt for Picaxe and Arduino projects. Now all in one compact supply right on board.

    Thank you.

  14. Will says:

    Thanks Brad

  15. brad says:

    Thanks for the comments Gary and Will! Great to hear it’s working nicely for you Gary 🙂

  16. Karissa says:

    There are occasions when inventory pictures just will not lower it and that you must ceate
    a customized picture for your website, electronic mail marketing campaign or
    landing page.

  17. Well, if you suppose you are not a born marketer, do know that
    hawrdly anybody is. It took me a good amount of time and the proper MLM internet advertising and marketing fundamentals information to determine tthat everyy
    one my apprehensions had been really quie out of place.

  18. IvanReynoso says:

    Hey Brad, i backed two toasters a few months back and for some reason one of them malfunctioned :/ is there any way i can purchase a few more. Great product btw!


  19. Jeff Luban says:

    Do you plan to have these for sale again soon? Thanks.

What do you think?

Leave a Reply

Your email address will not be published. Required fields are marked *