As spotted on Reddit, maker “tkuhn” of Electron Dust decided to create a machine “with the sole goal of keeping a ping pong ball bouncing for as long as possible.” To accomplish this, he turned to audio feedback using the time difference between when four electret microphones sense the sound of the bouncing ball. Audio processing […]
Making a custom arcade cabinet has become something of a rite of passage for aspiring hackers. As seen here, maker Rodrigo decided to add an extra bit of “flair” to his build (Portuguese), with buttons that light up under Arduino power. As demonstrated in the video below, the button lights slowly fade out after being […]
There are many ways to modify analog and digital electrical signals, but things get a bit more complicated—or at least specialized—when working with coaxial signal transmission. To this end, Kerry D. Wong found an unused attenuator evaluation board in his “miscellaneous PCB bin,” and decided to give it a new life using an Arduino. The […]
Programmable LEDs are amazing pieces of hardware, allowing hackers to add a rainbow of colors to projects at reasonable prices. Troubleshooting these devices, however, can be a pain, so Devon Bray developed the “BlinkBox” to help with this task. The resulting Arduino-based tester can work with multiple types of LEDs, and is able to cycle through […]
If you love electronics as well as plants, what better way to combine the two than with a smart hydroponic system? Students at the Juan de Lanuza School decided to do just that, creating a portable hydroponic assembly that’s automatically controlled with the help of an Arduino Mega. The system uses six lengths of PVC […]
Years ago, engineer and photographer Harold “Doc” Edgerton figured out how to “bend time” by pulsing a strobe light at the nearly the same speed as droplets of water, making them appear to move in slow motion, freeze, or even more backwards. Today, Nick Lim of jolliFactory has created the same effect, controlled by an […]
After Instructables user R0RSHACH’s son won a place at the World Scout Jamboree in 2019, the maker decided to create a fairground-style game for fundraising. The resulting device is akin to a Whack-a-Mole or Batak game that can be found at high-end gyms, and features eight large light-up buttons per player on a wooden frame. When activated, […]
Javier Betancor is developing a system that collects power as you ride a bike, with the goal of powering data collection and lighting. “imPulse” uses a stepper motor for power generation, along with a geared hub to make the motor spin at multiples of the wheel speed. While the project is still a prototype, the headlights […]
Stepper motors work by alternating a series of magnets in order to rotate its shaft by a certain angle. When the shaft is manually twisted, these magnets produce an electrical signal in a predictable pattern, which as shown in the video below, can be used as an encoder with the help of an Arduino Uno. […]
Ultrasonic sensors are great tools for measuring linear distance or object presence. As shown in this experiment by “lingib,” two sensors can also be combined to determine not just linear distance to a sensor, but its position in an X/Y plane. For his experiment, he hooked two of these units up to an Arduino Uno at […]
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