Hacking The IKEA TRADFRI LED Power Supply

ikea 603.722.50 : uses a standard arduino attiny84. this has a few quirks, such as using the i2c for the 8 bit i2c bus on the arduino, which causes a conflict with the spi on the pcb. this has been worked around by moving the i2c lines to different pins. there is a quadrature encoder with a built in switch that allows it to turn continuously. there are three test pads accessible through the case - uart tx, rx, vcc and ground. swd requires removing the back panel.

Hacking The IKEA TRADFRI LED Power Supply

ikea 603.722.70 : uses a standard arduino attiny84. this has a few quirks, such as using the i2c for the 8 bit i2c bus on the arduino, which causes a conflict with the spi on the pcb. this has been worked around by moving the i2c lines to different pins. there is a quadrature encoder with a built in switch that allows it to turn continuously. there are three test pads accessible through the case - uart tx, rx, vcc and ground. swd requires removing the back panel.

ikea 603.723.80 : uses a standard arduino attiny84. this has a few quirks, such as using the i2c for the 8 bit i2c bus on the arduino, which causes a conflict with the spi on the pcb. this has been worked around by moving the i2c lines to different pins. there is a quadrature encoder with a built in switch that allows it to turn continuously. there are three test pads accessible through the case - uart tx, rx, vcc and ground. swd requires removing the back panel.

the 'cute' 2.5w led strip light from ikea looks like a great fit for the bulbs, especially in europe, and it may prove to be more cost-effective for them, as well. the real trick here is to connect the leds directly to the usb power supply. the reason why the bulbs are so cheap is because they are made of plastic. the pwm chip is soldered directly to the bulb housing, making these bulbs fairly easy to recycle.

https://www.pridelondon.ca/group/tracks-trails/discussion/38409f96-99de-42dc-b9cf-5c0c2d915fbb