Adafruit will not be shipping orders Thanksgiving Day, Thursday November 22, 2018. Expedited orders placed after 11am ET Wednesday November 21 will go out Friday November 23.

The Story of the Sub Marine Explorer aka the Pearl Island Submarine

Around this time of year I always get intrigued with stories about boats and marine culture (typically inspired by spending more time on the water, where stories are told and ideas exchanged). I was previously unaware of the story of the submersible known as Sub Marine Explorer – built & designed in Brooklyn and New York no less! The technique that the submersible used was quite sophisticated (for its time). Wikipedia states,

Water ballast tanks were flooded to make the vessel submerge. Pressurized air was then released into the vessel to build up enough pressure so it would be possible to open two hatches on the underside, while keeping water out.

This allowed divers to simply reach out and grab oysters from the ocean floor, from places that were otherwise out-of-reach using standard diving techniques. This of course also lead to crew members being exposed to decompression sickness, one of the suspected causes for the death of the submersible’s inventor Julius H. Kroehl. The Science Channel video below gives some glimpses of the wreckage, the Smithsonian also have their version of a short video on the submersible online here, and if you’re still intrigued Compass Cultura have a long-form article worth reading.

Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on, jump into CircuitPython to learn Python and hardware together, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.

Join 8,700+ makers on Adafruit’s Discord channels and be part of the community!

CircuitPython – Python on Microcontrollers is here!

Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Follow Adafruit on Instagram for top secret new products, behinds the scenes and more

Maker Business — Spotlight on Makeblock, one of the latest companies to find success in the STEAM market

Wearables — Emphasize the light

Electronics — Avoid serial confusion!

Biohacking — BDNF a Biohackers Best Friend

Python for Microcontrollers — Python powers costumes, and community @circuitpython @micropython @ThePSF #Python

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at !


  1. Andrew Panayotoff

    Cool I was there a few weeks ago after transiting the Panama canal from the Atlantic to the Pacific. The old sub wreck is in bad shape. One good storm may cause it to break apart.


  2. That’s awesome you got to see it Andrew!

Sorry, the comment form is closed at this time.