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Ships within 48 hours · Estimated delivery Aug 26 - Aug 31
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Description
HackerBox #0091 - FibonacciExplore the beautiful mathematics of Fibonacci numbers, spirals, and sunflowers. Configure the Seeed Studio XIAO RP2040 microcontroller module for use with CircuitPython. Experiment with CircuitPython programming to implement NeoPixel animations and touch pad controls on the Raspberry Pi RP2040 microcontroller. Assemble the RGB LED Fibonacci Spiral Kit using 64 through hole NeoPixel RGB LEDs. Practice a step wise approach to PCB assembly using through
Explore the beautiful mathematics of Fibonacci numbers, spirals, and sunflowers. Configure the Seeed Studio XIAO RP2040 microcontroller module for use with CircuitPython. Experiment with CircuitPython programming to implement NeoPixel animations and touch pad controls on the Raspberry Pi RP2040 microcontroller. Assemble the RGB LED Fibonacci Spiral Kit using 64 through-hole NeoPixel RGB LEDs. Practice a step-wise approach to PCB assembly using through-hole soldering. Consider modification of the Spiral LED module into a wearable badge. Assemble the Cyber Voice Recorder kit from Cyber City Circuits. Get inspired to (re)watch Darren Aronofsky's 1998 film Pi.
HackerBox 0091 Box Contents:
- HackerBox 0091 Collectable Reference Card
- Seeed Studio XIAO RP2040
- Exclusive Fibonacci Spiral LED Kit:
- HackerBox Fibonacci Spiral PCB
- 64 Round 5mm WS2812B RGB LEDs
- Five-Pin Male Header
- Cyber Voice Recorder Kit from Cyber City Circuits:
- Cyber Voice Recorder PCB
- ISD 1820PY DIP14 Recorder Chip
- DIP14 IC Socket
- Electret Condenser Microphone
- 100k Ohm Resistor
- Two 1k Ohm Resistor
- Two 4.7k Ohm Resistor
- Five 0.01uF Ceramic Capacitor
- 220uF Electrolytic Capacitor
- 47uF Electrolytic Capacitor
- Blue LED
- PCB Mount 30mm Speaker
- Two Tactile Momentary Buttons
- CR2032 PCB Coin Cell Holder
- CR2032 Coin Cell
- Female-Female Dupont Jumper Wires
- I VOID WARRANTIES Iron-On Patch (designed by Jilles Groenendijk)
- I VOID WARRANTIES Sticker (designed by Jilles Groenendijk)
Fibonacci Spiral Badge Bundle
An extra project to turn the Fibonacci LED Spiral into a wearable badge is shown in the Box Guide. Information is included there for obtaining the components and assembling the badge. We have a limited quantity of kits for the extra project available here. Each is bundled along with a HackerBox 0091, which includes the Fibonacci LED Spiral Kit.
Badge Bundle Contents:
- HackerBox 0091
- Additional Badge Components:
- Exclusive Badge PCB for mounting Fibonacci Spiral PCB
- Three-Slot AA Battery Holder with Velcro Strap
- 5V DC/DC Boost Converter Module
- DPDT Battery Isolation Switch
- Two 1M Resistors (for touch pad activation)
- Four Female 5 pin Headers
- Additional Male Header Pins
- Lanyard not included (shown for demonstration only)
Online resources:
- Official Online Guide for HackerBox 0091
- Unbox & Build Video by 463N7
- Badge Project Video by 463N7
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.6 ★★★★★
Based on 26 reviews
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Product Reviews
★★★★★ 1
Poor quality
Color: Coffee
Zipper broke within 15 days of use
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 11, 2026
★★★★★ 5
Real leather, soft and lightweight
Color: Brown, Color: Brown
This medium sized leather tote bag is well made, with tight stitching; heavy duty, gunmetal colored hardware; and a thick, dark gray fabric lining on the inside. There are 2 short, rounded handles that do not fold down, and a narrow, flat, detachable crossbody strap that can be adjusted in length. The style is simple and classic, with a hand-dyed brown finish that will go well with most outfits. It's versatile, being suitable for work or everyday use. It can carry a small laptop or tablet, along with other essential items. There are no outside pockets, but inside there are several. The central compartment is spacious, with 2 slip pockets on one side. There are also 2 zippered pockets, with a large open pocket separating them. The top of the bag has a full, metal zipper that seems good quality. This bag is very attractive as well as functional, and though the leather feels lightweight the bag seems durable. Its listed price is a little high for my budget, but a coupon offer currently makes it a good value. I was very surprised that there is no logo or branding of any kind visible on the outside of this bag, and only one name label stitched to a pocket on the inside. Many bags I see have prominent names, symbols, or initials on the outside, and sometimes all over the inside lining as well. The simplicity of this bag is a refreshing change as it lets the quality speak for itself. I like it!
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Reviewed in the United States on January 5, 2026
★★★★★ 3
Great bag
Color: Brown, Color: Brown
This is a wonderful leather bag. It can be carried by handles or worn crossbody. It fits my 13" MacBook Pro perfectly though it doesn't have any particular padding to protect a laptop. I have a couple of nitpicks though for a bag that costs $98. 1/It's a shame that the handles can't lay down or disappear in some way when not in use. They just look a little goofy when you wear the bag across your body. And 2/the stitching is a little weird. The exterior shows the stitching for the inside pocket and I don't know that it's necessary. All in all it's a good bag but if I could return it I would consider doing so because of the way the handles stick up when worn crossbody. I do think, ultimately that's a dealbreaker for me.
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Reviewed in the United States on December 23, 2025
★★★★★ 5
This Bag Is Unbelievable - Serious Business
Color: Brown, Color: Brown
I’m a self-admitted bag enthusiast, and this one genuinely surprised me. I wasn’t familiar with the brand, but the quality is immediately apparent. The leather is soft yet substantial, giving it a premium feel without seeming fragile or flimsy.
The stitching is impeccable, and the front and back are cleanly designed with no unnecessary frills—just a timeless, well-constructed silhouette. It’s the kind of bag that people notice, whether you’re carrying it or someone sees it from across the room.
The strap was neatly packaged inside, and everything arrived in perfect condition. I looked it over carefully and couldn’t find a single flaw. In my opinion, this is a near-perfect everyday bag and an impressive value for the quality.
*** Photos are front of bag (same as back), side of bag & bottom of bag. As you can see the stitching, as well as everything else, is quite impressive. Love this bag!
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Reviewed in the United States on December 30, 2025
★★★★★ 4
Gorgeous Color!
Color: Coffee, Color: Coffee
I am very happy with the color of this purse the inside pockets and zipped pockets, a total of 4, allows for neat organization of all my items such as phone, cosmetics, sunglasses, tissues, perfume, mints and etc... I love the gun metal colored hardware. The zippers move smoothly. The crossbody strap is long enough for my 6' frame and sits right at my hip when I use the last buckle hole. All the stitching is complete and tight. Speaking of stitching, I removed a star because the inside pockets are sewn on and shows on the back of the purse. I don't like having to check if my purse is facing the right way. For the price of this purse the stitching should not be showing. The interior lining is a cloth-like fabric. The inside zipped pockets are full size and lay on top of each other. This is different from what I've seen in other purses. When the purse is full, the top pocket slightly covers the main compartment bottom from view. I will be sure to put something somewhat flat in that pocket to avoid this. There is no offensive odor from shipping. Because of the stitching issue, I cannot recommend to others without point this out.
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Reviewed in the United States on December 31, 2025
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