Hello, I am new to this forum so if i'm repeating somebody elses thread i apologise. I was hoping maybe somebody could put me on the right path. What i am after is to be able to control some switches/relays somehow through my computer. This will be used mainly for home automation/security but i think if it is possible the limitations are endless. I know about X10 controllers etc but i thought it could be possible to build something that connected to my serial port and use this to do it, this unit could drive smaller relays to switch larger ones. I am familiar(ish) with electronics, if such a thing could be made and if it would need building from scratch i would give it a good go. One thing I'm rubbish at is anything that needs any code writing for it, this would be beneficial if it was something already written and open sourced that i could use and donate funds to! The unit doesn't really need two way communication, but this would be a bonus (ie confirmation of switching on/off) but if 2 way comms wasan option then PIR's could be monitored some how. I have done the obvious searching on the internet but to no prevail. If anyone can help, please do. If not, then am gonna have to use something like X10!