Browsing archives for 'LED'

Led Illuminator for reflected light microscopy

Led Illuminator for reflected light microscopy

LED 27 February 2010 | 3 Comments

This device was made to fit on my 4x and 10 x biological microscope planar microscope objectives, which are primarily designed to view slides. Accordingly, they have a relatively short focus and high numerical aperture.

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THREE-COLOUR DISPLAY BICOLOUR LED

THREE-COLOUR DISPLAY BICOLOUR LED

LED 6 February 2010 | 2 Comments

The circuit presented here uses bicolour LEDs to generate a display in three colours, namely, red, green, and yellowish green. Transistors T1 through T20 form a grid to which common-cathode bicolour LEDs

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