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Peltier Lamp (model I | Cube Edition)

Efficiency booster for candles.


The Peltier Lamp converts heat from a tea light candle into electricity for a USB LED lamp  (model Jansjö from IKEA).

Price $135.00

Member price $121.00

Available within 7-10 days!

This item expected shipping time is 3 days.

Details

This lamp uses a Peltier thermoelectric module to convert heat from a candle flame into electricity. A Peltier module is a sort of semiconductor heat pump which uses electricity to transports heat from one side to the other, or generates electricity from heat transport through the module. If you heat a Peltier module on one side (for example, with a candle) and cool it on the other side (for example, with a fan), it will generate electricity.

This design use two TEC1-12706 Peltier modules connected in series. They are clamped between two heat sinks. This assembly is mounted above a tea light candle holder and can be adjusted in height. The bottom heat sink distributes the heat from the candle evenly over the surface of the Peltier modules. The top heat sink (together with a fan) keeps the cold side of the Peltier modules as cool as possible. Finally, a DC/DC boost converter raises the output voltage from the Peltier modules to a suitable level for operating a USB LED lamp.

NOT LOGICAL, BUT EFFECTIVE

A special feature of this design is that the fan is also powered by the electricity generated by the Peltier modules. Despite this, the power available to the USB lamp equals or even exceeds the value obtained without the fan.

The circuit is built around an LTC3105 IC, which is a 400 mA step-up DC/DC converter. This device can operate with an input voltage as low as 250 mV and is also used in many energy harvesting applications.

MAIN COMPONENTS

  • IC1: LTC3105EMS#PBF
  • TEC1, TEC2: TEC1-12706 40x40 mm
  • 1x USB reading lamp, Jansjö (IKEA 702.912.32)

MECHANICAL COMPONENTS

  • 5mm extruded transparent acrylic sheet, laser cut
  • Heat sinks, threaded rods, bolts, acorn nuts, knurled nuts, extension springs, brass tubes, washers 
  • Heat-shrink tubing, rubber feet, thermal paste, fan

 

PELTIER LAMP MODEL I :  CUBE EDITION

For a limited time only, Elektor is offering two versions of the Peltier Lamp, which only differ in the shape of the acrylic housing and the engraving. Lamp I is a cube with straight edges, while Lamp II has curved top edges on the sides.
The kit includes all parts necessary to build the project: a fully assembled DC/DC converter board, acrylic parts with all fittings and hardware, Peltier modules, fan, USB lamp, and even a couple of tea lights. All you need is a screwdriver and some matches or a lighter.

SKU 18125
Manufacturer Elektor Labs

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