Joule Thief

Daycounter, Inc.
Engineering Services

Custom Firmware, Electronics Design, and PCB Layout

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Capabilities

Electronics Design

Firmware Development

Software Development

Embedded Design

PCB Layout

Digital Signal Processing (DSP)

Reverse Engineering

Prototyping

Device Driver Development

VHDL

Motor Controllers

Microcontrollers

Data Acquisition Systems

Palm OS Software

Windows CE Software

Pocket PC Software

Design for Manufacturing

Through Hole to Surface Mount (SMT) Conversion

Microchip PIC Consultant

MSP430 Development

DSP56 Development

RoHs Redesign

Design for USB

Joule Thief

See our other Circuits.

This circuit is useful for driving LEDs with a single AAA cell. The transformer steps up the Voltage. The transistor turns on because the base is pulled up. However, when it turns on it produces a negative current on the base, which turns it off causing oscillations which are in the range of 50KHz.

Joule Thief Schematic

Joule Thief Schematic

Do you need help with an electronics design? Daycounter provides contract electronics design services. Contact us to give you a quote on your electronics design project.

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Call us now at 1.801.938.4264 - 502W. 9460S. Sandy, UT 84070