Second Stage Joule Thief Circuit
#joule thief
#voltage booster
#low voltage
#energy harvesting
#battery
#transistor
#oscillator
#LED
#efficiency
#DIY electronics
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simple emergency led light circuit
This emergency LED light is simple, inexpensive, and easy to build. The circuit connects to the battery, activating when the main power source is unavailable, such as during brownouts. White LEDs turn on automatically. Initially, the output voltage from a...
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This circuit sequentially lights ten bulbs, first in one direction and then in the opposite direction, creating an appealing visual effect. Gates N1 and N2 form an oscillator, which serves as a clock for the BCD up/down counter CD4510 (IC2)....
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General There are many 9V chaser circuits that seem to waste about 7V when driving LEDs that are only about 2V. This project is unique, because it uses only two inexpensive alkaline battery cells totaling 3V for power. Since most...
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Photo. This is the test circuit -the basic driver is only two transistors, two resistors, the circuit was evaluated using a white LED, but when it was time to button it up and archive it, I replaced the expensive white...
7Segment Common LED UV Exposure Box
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The 7-Segment Common LED UV Exposure Box Circuit is designed for applications requiring precise timing and display...
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This simple LED torch is powered by a 2-transistor blocking oscillator that increases the voltage from a 1.5V cell. The design utilizes the natural current limiting characteristics of a 150 µH choke to prevent the white LED from being overdriven....
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The circuit illustrates how the combination of a blue LED and a white LED can be utilized to create a realistic imitation of a camera flashlight.
The circuit design employs a blue LED and a white LED in conjunction to simulate...