From Ken Olsen of The Maker’s Box:
You never know what people will do with your ideas, and it is always fun to see someone do something I would have never thought off with them. I got a video from someone who built my Programmable Fidget Spinner, and used a leaf blower to see how fast they could get it to go. Fortunately, they were wearing safety glasses, and no, it didn’t come flying apart. It did, however, start displaying erratically at about 3600 RPM (the fastest I can get it by hand is just under 2000 RPM).
So, what is going on? TLDR: I figured it out and fixed it, and here is proof.
We are proud to be a sponsor of this Maker Faire Orlando soldering kit:
For the past six years at Maker Faire Orlando, members of FamiLab have taught attendees how to solder with a cool little Makey pin with 2 self-flashing LEDs. We’ve been asked for more advanced soldering training, and we responded with the addition of a PIC-microcontroller-based board twinkling several LEDs, and with a switch that can be used to change the LED display pattern.
We opted to design the board such that it can be used as a pendant on a necklace (lanyard) or as a keychain (especially for those of you who like large keychains). The design is a scalloped 2.7″ circle with LEDs on the outside circle, and a hole at the top for a keyring. Batteries are on the back of the board.
Exciting project by Alex Wulff on Hackster.io:
This whole circuit is the same size as a regular poker chip, but with an added surprise: lights!
Spice up your poker games with these cool blinking chips. They can be programmed on the fly to have a certain number of the LEDs illuminated to indicate value, or you can have the lights blink in a cool pattern. They make great playing chips for championships or great prizes to hand out to the winners.
Video of the board in action:
AlexWulff has shared the board on OSH Park:
Brian Benchoff writes on Hackaday:
Last week, everyone on Hackaday.io was busy getting their four project logs and illustrations ready for the last call in this round of the Hackaday Prize. These projects are the best of what the Internet of Things has to offer because this is the Internet of Useful things [..]
This is a PoV fidget spinner, which means the leading edges of this tricorn spinner are bedazzled with APA102 LEDs. Persistence-of-vision toys are as old as Hackaday, and the entire idea of a fidget spinner is to spin, so this at least makes sense.
Find out more on the Hackaday.io project page by Matthias:
A WiFi fidget spinner, taken from concept to ordering parts in one weekend
The KiCad design files are available on GitHub:
matthias has shared the board on OSH Park:
Teensy creator Paul Stoffregen has shared a new project on OSH Park:
The Monolith Synth Project needed to use a large number of these LED lit arcade buttons.
Dimming of the LEDs was required. Initially I considered using this Adafruit 16 Channel PWM board. But the LEDs in these buttons have integrated resistors which require 12 volts, so 16 transistor circuits and another board for reading the switches would have also been needed.
It uses the same PCA9685 chip for 12 bit PWM control on every LED, with mosfet drivers to handle 12V outputs, and also a MCP23017 chip to read the buttons. Every button has a discrete 1K pullup resistor (rather than using the higher impedance on-chip pullups) to help with use in the same cable bundles cross coupling to 12V PWM signals.
Four of these boards where used in the Monolith Synth project:
The project is featured in this Tested video:
From Radomir Dopieralski on Hackaday.io:
A shield for Adafruit Feather boards with buttons and a LED matrix display, for simple games.
Surface mount diodes are simple enough — all you need to do is make sure you have the anode and cathode in the right order when you place them on the pad when you solder them. These SMD diodes come in industry-standard packages, but do you think there’s an industry-standard way of marking the cathode?…
via Tweezing Diodes — Hackaday