HDK Fritzing Parts

While the LittleBits team shares their brd and schematic files for the parts, there’s no Fritizing files made available.
I’ve started to take a crack at this with the HDK parts and particularly the perf bit:

The Fritzing file is @ https://github.com/shaiss/LittleBitsPerfFritzing/blob/master/LittleBits%20w29%20Perf.fzpz?raw=true

Next will be the protobit and maybe at some point the bitsnaps.

Note that the perf bit breadboard view is the only one complete at this time. The schematic might work but I haven’t tested this.

Please feel free to comment and let me know if you find this useful at all @Philip_Verbeek @JackANDJude @chris101


And here’s the protoBit. Was much easier than the perf. I haven’t validated this one yet, so use with caution for now!

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Thanks for doing this @shaiss! I can’t wait to try using these!

@JackANDJude, let me know how it works out.

UPDATE: I fixed the internal wiring on the proto bit. It’s now wired as the module WITHOUT the jumpers. So, if you want to emulate the jumpers that come on the board, remember to jump the male pins with a wire like the picture below:

I created a pcb board template based on the proto and perf modules for fritzing and it seems to work :wink: But I haven’t tested it out yet on a fab’d board.

SVGs can be found @ https://github.com/shaiss/LittleBitsUltrasonicRangeSensor/blob/attiny85/pcb_board.svg & https://github.com/shaiss/LittleBitsUltrasonicRangeSensor/blob/attiny85/pcb_board_30mm.svg

Here’s an example of it in Fritzing

UPDATE 9/8/15:
confirmed the pcb layout works with the bitsnaps after printing on photopaper and gluing to some cardboard. Next it’s of to fab which will really confirm the layout.


Beautiful @shaiss! How will you fabricate?

Very cool @shaiss - it almost looks like a real bit!

(the perspective of your photo is awesome)

OshPark, they are the cheapest and best possible service for small batches. Should I need more than 3, I have had good success so far with Jaco: http://www.ebay.com/itm/161571651593?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT. Great service there too, but longer lead times since their in HK. Jaco can do white soldermask, but only black silkscreen.

To be fair, I have orders with both above, but haven’t received any previously fabricated parts, yet… They are due in this month though.

yup, the key is the white soldermask. My kid saw the purple oshpark screenshot and said “that’s not a littlebit”. He saw the white photopaper printed one and said “It’s a really bit now”. I had to let him down, reminding him it’s just cardboard for now :stuck_out_tongue:

Later this week after a few more touches, I intend on ordering the fab from oshpark. I’ll just have to call them special edition bits :smiley:

Got the first prototype back from oshpark. Note the tabs on the edges are part of the fab process and I’ll need to cut them off later. Only issue so far is the male side drill holes are a tab too small. I’ll have to check why later. I buzzed the circuit and it sounded good, so next step will be to solder after I widen the holes a tad.


Got home and soldered all the components only too notice the dip socket+attiny on the bottom of the board is too tall. Oh well it does work so I’ll leave it for now.

In the end this confirms that there fritzing file I shared earlier does in fact work. The fritzing file with all the components can be found at https://github.com/shaiss/LittleBitsUltrasonicRangeSensor

Next steps will be a slight board redesign with smd parts. I’ll keep this thread open and pay any other littlebitts+fritzing related parts.

Here’s the bit with everything soldered.


Nice circuitry Shai! It looks good and works ! That’s the goal right there. You might have to solder the tiny directly … :frowning: (I don’t like doing that either. Or can you put it on the top, but bend the pins upside down?) also I like that sticker you have that identifies the pins - very cool (I have written on the chips with a pencil before, but the sticker is *great.)


It’s lookin’ good, @shaiss! :slight_smile:

I’ll give that a shot to see if that can work with my penny 8pin dip ICs. Thanks for the tip!

You can get one @ https://www.tindie.com/products/densikit/avr-seal/. They’re a bit hard to get to stick cause their so small, but makes it really easy to identify your pins when breadboarding.

Hi @shaiss,
Do you also have a project in mind with your great ultrasonic range detector ? Maybe you could publish it on the project page ? :grinning:

You could take a look at this forum topic:

@alexpikkert I don’t have a particular project but had some ideas.

  1. Parking sensor
  2. Detect a foreign object in a path
  3. Detect a moving object from a distance

There’s all sorts of things you can do when you know the distance of something. Not to mention the use in robotics. I’ll work on some ideas and post something soon. I’ll reply back to that thread you shared too.

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