This meter is part of a DIY power meter. It is connected to a current-sense transformer through a diode to meter current outgoing a common household energy counter.

Antic (però encara en ús) quadre electric d'una masia de Perafita. Com podeu veure la companyia original de distribució era Hidraulica de la Gabarresa, basada a Olost.

View On Black

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Old but functional electric meter in a centuries old country house in central Catalonia.

The company seems to be Hidraulica de la Gabarresa (the Gabarresa is a very small river nearby).

GRflickr Photowalk

Grand Rapids, Michigan

The green wired thing is a photo transistor. It detects blinks of the LED on the meter. The LED blinks 1000 times per kWh of energy used. The photo transistor drives a relay which simulates left mouse button clicks. Left button generates mousePressed() events to Processing which can keep count of the energy being used.

More details at www.5volt.eu

This is the data window of my energy meter written with Processing. I took snapshot while running the photo transistor version. The other version uses a webcam to keep an eye on the energy meter and detect pulses of the 1000 pulses per kWh LED.

More details at www.5volt.eu

This is the photodetector to be placed in front of the blinking LED of the billing Energy Meter and the monostable pulse to drive the relay inside the mouse.

Driving the coil of the relay simulates a mousePressed() event in Processing.

More details at www.5volt.eu

Tweet-a-watt also works on other energy monitors than kill-a-watt! This is a common energy monitor found in Europe. This was my first energy meter and I bought it from Claes Ohlson. They don't have this particular model, but the other models should use the same quad op-amp. www.clasohlson.fi/Product/Product.aspx?id=147812364

This is web cam's view as seen from Processing's window. These LED on my energy meter, the one used to bill me by the electric company, blink once every W hour, that is 1000 blinks every kWh. The photo detector is placed in front of this LED to drive an event to Processing.

More details at www.5volt.eu

Check your home energy consumption anytime, from anywhere with our new online platform. Engage has been developed to help you monitor your electricity use and manage your energy data online. Monitor, understand, reduce and save your energy consumption and costs now!

www.efergy.com

A web cam keeps its eye on my energy meter. It detects Watt-hours pulses and counts them on Processing.

More details at www.5volt.eu

Located in a car park on Norfolk Street.

Fremantle, Western Australia.

A relay is inside the mouse. The normally open contacts of the realay are in parallel to the left mouse button. The purple wires go to the coil of the relay. Driving the coil simulates a mousePressed() event in Processing.

More details at www.5volt.eu

More details at www.5volt.eu

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