Please see all COVID-19 updates here as some shipments may be delayed due to CDC safety and staffing guidelines. If you have an order or shipping question please refer to our Customer Support page. For technical questions please check out our Forums. Thank you for your continued support.

Friday Product Post: Hatters Gonna Hat

Three new high-grade audio HATs for your Raspberry Pi and eight new ways to light up your next e-textile project. It's Friday...let's go!

Favorited Favorite 0

Hello and welcome, one and all, to this Friday Product Post. We have a pretty big week for you guys, and we are excited to started showing off all the parts. This Friday we are pleased to bring you JustBoom's three marvelous audio HATs for the Raspberry Pi, as well as eight different sewable LED ribbon options, perfect for adding a bit of flair to any article of clothing. Let's take a closer look, shall we?

You wait here; I'll go on a head. Well...a header.

JustBoom Digi HAT


The JustBoom Digi HAT is a high-resolution digital audio output add-on board for the Raspberry Pi. Simply stack the plug-and-play add-on board (HAT) onto your Raspberry Pi A+, B+, 2B or the new 3B, and it will be ready to use immediately. The JustBoom Digi HAT produces an unmodified, high-quality digital audio data stream for bit-perfect transmission to your hi-fi system.

JustBoom Amp HAT


Like its siblings above and below, the JustBoom Amp HAT is a high-quality audio amplifier designed specifically for the Raspberry Pi. Digital-to-analog conversion is also included with the Amp HAT, so no external sound cards or DACs are required. Featuring a Class-D power amplifier chip with built-in 192kHz/32-bit DAC, for a peak power output of 2 x 55 watts, the JustBoom Amp HAT outputs audio over two speaker cable connector blocks that accept anything up to 14 AWG cable and will provide crystal-clear audio to either 4 or 8 ohm passive speakers.

JustBoom DAC HAT


The last of the HATs is the JustBoom DAC HAT, a plug-and-play, high-resolution digital-to-analog converter featuring a 384kHz/32-bit DAC chip with hardware volume mixing as well as a 138mW headphone amplifier. Outputs are line level over RCA and headphone amplified over 3.5mm jack cable.

Global Power Supply - 15V 4.34A

Global Power Supply - 15V 4.34A


Of course you'll need a good power supply for some of those HATs. The Global Power Supply is a 15V, 4.34A power device specifically designed to work with the JustBoom Amp HAT for the Raspberry Pi. Additionally, as this is a "global" power supply, each order includes plug adapters for the United States, United Kingdom, European Union and Australia.

Sew bright!

Sewable LED Ribbon - 1m, 50 LEDs (Red)


Sewable LED Ribbon is quite possibly one of the easiest ways to incorporate simple illumination and color effects into your next e-textiles project! Each strand of this ribbon is a meter long with 50 small red LEDs. These LED ribbons are highly flexible, foldable, and can even make knots.

We also carry this same ribbon with only 25 LEDs at a lower price. Red isn't the only color we carry, though!

Sewable LED Ribbon - 1m, 50 LEDs (Green)


We also carry green LED ribbon in 50 LED and 25 LED varieties...

Sewable LED Ribbon - 1m, 50 LEDs (Blue)

1 Retired

Blue LED ribbon with 50 LEDs and 25 LEDs...

Sewable LED Ribbon - 1m, 50 LEDs (White)


And lastly, white LED ribbon with 50 LEDs and 25 LEDs.

That's it, people! Plenty of new options for projects and experiments alike. As always, we can't wait to see what you make with these parts! Shoot us a tweet @sparkfun, or let us know on Instagram or Facebook. We’d love to see what projects you’ve made!

Thanks for stopping by. We'll see you next week with even more new products!

Comments 5 comments

  • The sewable LED ribbons are a neat idea, but I'm wondering if there's any thought of having them with addressable RGB LEDs (e.g., DOTSTAR or Neopixel)?

    BTW, I've checked all 8 "item pages" for the sewable LED ribbons, and NONE have any electrical specifications. Could you PLEASE remedy that? (It would be very nice to see current ratings, whether the LEDs include ballast resistors [or are simple parallel circuits], and voltage ratings.)

    • I don't know if it was intentional or not, but your comment came off as rather rude and forceful. Sparkfun is a relatively small company and not a massive OEM like Phillips or Bose; minor mistakes either on the product pages themselves or in the IT infrastructure are bound to happen from time to time. Perhaps rephrasing to something like the following would be better:

      "The LED ribbons are a really neat idea! Have you folks looked into an addressable version?

      "Also, just a heads up, but it looks like some of the data sheets and electrical ratings are missing on the LED ribbons ;)"

      I've met nearly everyone that works at Sparkfun at one time or another - while Sparkfun is certainly a business that makes money, the main goal of everyone on the team is to make and sell great things that allow folks to get the best out of their projects. This is a company and group of people that has sent out free revision boards at great cost of themselves when something as minor as a screen printing mistake or a wrong version of a bootloader is found (both things that are easily fixable by users). Please be nice to them :)

      • SparkFun is, in my [not so] humble opinion, one of, if not THE best company around as far as their customers go, in this, or any other industry I'm familiar with. I meant my comment to get them to keep it that way. I've been around the electronics hobby for more than 50 years, when one of the few options to get parts was "Poly-Paks" [sp?], which would tell you a quantity and "general" thing that you were getting -- and it might or might not work.

        At a minimum, I think that someone should take one of each color of the LED ribbons into the lab, set up with an adjustable power supply and two DMMs (one to measure the current and one to measure the voltage across the LED ribbons). Starting at 0V, adjust the power supply up until the LEDs are just visible, record the current and voltage readings, then crank it up until they're "very bright" (hopefully not to destruction), and record those readings. Report them on the product page, with the caveat that this data is from one sample. From this, though, I can at least get more info than the rather nebulous "I used two coin cells". (By the way, I certainly do not expect an actual brightness measurement, though letting them operate at "very bright" for a few minutes to check that they're not getting overheated [maybe just by feel] would be wise.)

        I know that they have the equipment required for the tests above. They've used it in a lot of their videos, plus the store is reporting an inventory of 5 for power supply and 78 for the higher quality DMM and "250+" for the "economy" DMM. Oh, and "250+" for test leads. Note, Mr. Electrical, that I've put this paragraph here for your benefit, not for the folks at SparkFun, whom I'm sure don't need the prompting.

        Without the data I've mentioned (two paragraphs ago), to me, it's not "product ready". I know how hard it can be to get actual datasheets out of the small Chinese manufacturers. Although those would be best, a couple of data points from measurements on an actual sample of the product would be a lot better than nothing, and would "sufficient" for many applications.

        • Incidentally, one can get very nice I vs. V curves with an Analog Discovery 2 and a resistor, up to the power output limits (5V and 700mA using the power supply or about 100mA using the function generator). The function generator or power supply can be driven (slowly) with a triangular wave, so the I-vs-V curve can be collected in one pass using the two differential scope channels. I've used this technique for DC characterization of several parts, including LEDs.

    • We are aware, we are hoping to get a datasheet for them soon. :)

Related Posts

Recent Posts

Drone Technology


All Tags