Onion II – Maker Extension

Rated 5.00 out of 5 based on 3 customer ratings
(3 customer reviews)


Tinker board text text pinout tabelle

Out of stock



This is┬áthe ONION DIP for the C.H.I.P. (a $9 computer developed by NTC). The C.H.I.P. is a great board, a tiny linux computer that fits on your palm. But what if you want to build your own extension DIP? A RTC to be always up to date, a rectifier to power the CHIP of a AC source. A build on a breadboard will work fine for a test but won’t last for a permanent setup. This is where the ONION kicks in. It has a small tinker area with 2x5x3 pads and breaks out all the pins from the C.H.I.P. Here you can solder everything in place. The ONION is cheap enough to use one board per setup.


  • Breaks out many of C.H.I.P.s pins.
  • Standard UART footprint for FTDI USB cable (but you can get it cheaper on eBay)
  • Optionally: Provides three simple LEDs.
  • Optionally: Can be equipped with an on-board n-MOSFET to drive some bigger loads.
  • Optionally: Can also carry a Relay to drive some bigger AC loads (230V, 10A), e.g. your garden sprinkler. That relay is driven by the n-MOSFET.
  • Optionally: An on-board DCDC regulator that allows me to power the ONION from 7-28V DC and provides stable 5V with up to 3A current to the ONION and the C.H.I.P.. (e.g. run your C.H.I.P. on the 12V from your car)Power is a big issue on the C.H.I.P. most likely the #1 problem on the forum. The reason is that C.H.I.P. draws quite a lot current from the powersuppply (I’ve measured 350mA at idle, and ~500mA under load with spikes up to 650mA). If your powersupply can’t handle those spikes with stable 5V but instead reduce the voltage C.H.I.P. crashes. I’ve measured the stability on a few of my phone chargers, which claim to be 1A stable. The first provided 4.65V at 350mA, the next 4.7V@350mA and went down to 4.2V when I started a CPU intense task. That when I’ve decided to add my own DCDC regulator.

    This pictures actually shows the QUESO DIP, but it is the same DCDC regulator. At the moment I feed it with an old laptop charger, 80W at 20V give me a lot of backup and the worst I’ve seen was 4.75V at 1.5A load.

See below for the Pinout

Additional information

Weight 0.013 kg

3 reviews for Onion II – Maker Extension

  1. Rated 5 out of 5

    Works great. Be sure you get the headers pre-soldered. Lots of pins!

    Oh, and pay attention to how the DC in is connected – it is opposite to the queso. If backwards you get even more soldering work.

  2. Rated 5 out of 5

    I have one of the original ONION I’s and it’s awesome. Great for prototyping right on the CHIP and allows you to easily power the CHIP in embedded projects.

  3. Rated 5 out of 5

    (verified owner)

    I have two Onion II Dips, one I got blank and intend to play around with it… The other I had pre built with a DC/DC converter and pass through headers. I am using that one between the chip and a tzatziffy to provide power from my car for a touch screen in car chip.

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