Ljusmaskinen: a portable light rig attached to a backpack #Video
Ljusmaskinen is a portable light rig attached to a backpack. It’s got 4x4W RGBW spots and 4x10W COB LEDs mounted on a rig made out of aluminium profile. The chassis is build up of 2020 aluminium profile and can be folded to take up less space when transporting.
I went with a little unusual LED driver for this build. Since this is a battery operated product I didn’t want to limit the current with resistors and loose a lot of effect on them. Especially since effect of the LED is 1W per color channel.
I decided to limit the current consumption of each color of the LED by supplying it’s forward voltage from a buck regulator. By simply adjusting the voltage in the buck I could trim it to around 200mA per channel.
The extra potentiometers in the bucks would also give me the option of adjusting each color channel separate. That made the color calibration of the light so much easier.
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 code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, 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.
Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.
Python for Microcontrollers — Python on Microcontrollers Newsletter: New Releases of MicroPython and CircuitPython and more! #Python #CircuitPython @micropython @ThePSF
