The Hallow Flashlight is a flashlight that runs solely on the heat from the human hand. It uses four Peltier tiles and the temperature difference between the palm and ambient air to produce up to 5.4 mW of brightness at 5 foot candles without batteries or moving parts. The Peltier tiles produce electricity through the Seebeck effect as opposite sides are heated and cooled at the same time. The flashlight provides a steady beam of LED light for 20 minutes using only body heat through a patent-pending transformer design. However, its brightness of 24 lumens is less than commercial flashlights that can produce dozens or hundreds of lumens.

1. THE HALLOW
FLASHLIGHT

3. DESCRIPTION
• A flashlight that runs solely on the heat of the human hand. Using four
Peltier tiles and the temperature difference between the palm of the hand
and ambient air
• design that provides bright light without batteries or moving parts.
• ergonomic, thermodynamically efficient, and only needs a five degree
temperature difference to work and produce up to 5.4 mW at 5 foot candles
of brightness.

4. • PELTIER TILES - produce an electrical current when opposite sides are heated
and cooled at the same time.
• **Peltier tiles are a common thermoelectric tool that produce electricity when one
side is heated and the other remains cool – a phenomenon called the Seebeck
effect. **
• BODY HEAT- The basic principle revolving around the idea of the hear powered
flash light
• Steady beam of LED lights for 20 min
• ** patent-pending design used a transformer of its own**
MECHANICS AND FEATURES

5. • Only puts out 24 LUMENS compared to other commercial flashlights that
“And then there’s the business of securing her flashlight’s patent and tweaking
the prototype for market. At roughly 24 lumens, Ann’s flashlight’s brightness
falls shy of commercial flashlights, which output dozens if not hundreds of
lumens.”