This week's pick is pretty interesting. Someone designed a 1-wire based touch light switch. The demo is pretty impressive. Check out the video below.
This is my wall mounted light control switch, using touch sensing IC-s (qt320). The switch communicates on 1-wire bus with a PC running a home control software (IP-Symcon). The actors (which actually turns the 230v lights) are relays controlled on 1-wire too. The design is quite final, only the front plexyglas will be changed with a nontransparent one, to increase scattering of light from the LEDs. Using 1-wire for this project was a mistake (I chose because of its simplicity, I may change it to I2C or RS485), because the 1-wire devices on bus are polled, so there can be a significant delay on sensing events. As for now this delay don't exceeds the shortest device poll interval provided by the control software which is 1sec, but there are just a few devices hooked up on bus (4xDS2413, 2xDS2408, 2xDS1820, 1xDS2405) , more 1-wire devices will slow down the "sensing speed".
YouTube.com Video
Click here to view the article
This is my wall mounted light control switch, using touch sensing IC-s (qt320). The switch communicates on 1-wire bus with a PC running a home control software (IP-Symcon). The actors (which actually turns the 230v lights) are relays controlled on 1-wire too. The design is quite final, only the front plexyglas will be changed with a nontransparent one, to increase scattering of light from the LEDs. Using 1-wire for this project was a mistake (I chose because of its simplicity, I may change it to I2C or RS485), because the 1-wire devices on bus are polled, so there can be a significant delay on sensing events. As for now this delay don't exceeds the shortest device poll interval provided by the control software which is 1sec, but there are just a few devices hooked up on bus (4xDS2413, 2xDS2408, 2xDS1820, 1xDS2405) , more 1-wire devices will slow down the "sensing speed".
YouTube.com Video
Click here to view the article
