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Yes, 5V is the max... I'm running of the 3.3V line. A RasberyPi board + wifi + power is about $50. A TL-WR703N can be had for $20 on ebay :-)

Yes, DIY forum is a treasure trove! Rygh, I'm using a TP-Link TL-WR703N ( I have half a dozen ready for sacrifice!). That router has at least 4 GPIOs available for surgery and currently, I am using 2 for an I2C bus that can be used for anything. I currently have several PWM channels and generic...

Folks, For my entertainment, I am building a reef controller based on an OpenWrt wireless access point. The main advantages of that solution: - that the controller will be networked out of the box (wifi or ethernet). - accurate time management using NTP. - ability to send email alerts...

Good point. Until my ATO works, I'm scared of running a fan unmonitored over the weekend...

Excellent! Regarding cost, I'm not paying for the electricity going to that tank :-) For the mount, I'm thinking about epoxying a bracket to hold the fan, peltier and radiator, so I should be able to mount it loose accounting for expansion. Good idea to insulate the back glass from the...

Folks, I have a problem with my 12G nano tank: it's in my office and they don't have AC running over the weekends... My temp logger shows the tank shot to 85 both days. :-( I've been having a wild idea: stick a peltier chiller to the glass of the tank. That way, no complicated plumbing or...

Ok, I followed the board's advice and got a retrofit from RapidLed. :-) I now have an arduino controlling both led dimmers, temperature, hood fan and ATO. I'm in heaven! Thanks guys! -Fred

Folks, this is my first post after a 7 year hiatus... so bear with me! I now have a 12G nano and things have changed since my 90G was sold! Amazon has a video light that seems ripe for hacking @ $20...