This circuit can be used to test up to three LEDs at once, connected in series. You can easily increase that number by using a higher supply voltage. If you do so, you should allow 2.7 V for each ...
The capacitors are 22 microF. “Dyn” is a dynamo. The part to the left of the dotted line is a perfectly standard LED flashlight circuit. The right is the 'squeeze to charge/power lights' addition. And ...
High-brightness LEDs, with independent delay and duration, find use in a visual-inspection application. This circuit is not complex, but it saved the day in an application involving visual inspection ...
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