.:madworm:.'s photos with the keyword: upgrade

If you want to upgrade your Samtid lamp too: www.tindie.com/search/?q=ikea www.youtube.com/watch?v=bqfhPx35lqA www.github.com/madworm

This one used to be illuminated by a blue LED. Now it's got an RGB LED + intelligence in form of an ATmega168.

Capacitive sensing works quite OK, but it helps a lot if the power supply is grounded.

The metal cap is used as a capacitive touch sensor to change the delay speed of the color fading.

More light for macro shots - or so I hope. The center hole (28mm) should be wide enough to make this ring just slip over the camera's extended objective and bring the light to where it is needed. I may have to do some grinding and smoothing of the inside to get a good fit and prevent scratching the objective - which is made of silver painted plastic. I was able to squeeze a little controller board inside the cutout area. No fancy constant current control, just a lot of resistors, a mosfet for PWM control and an ATtiny13 with up/down buttons. It's meant to run with 5V DC. Initially I had the idea to add a little boost converter to make it run with 3V (2x AA cells) or a LiPo, but that was scrapped.