Hobby Projects - Insulation tester, LED Circuits, Meters.
Showing posts with label Optical-IR-Switches. Show all posts
Showing posts with label Optical-IR-Switches. Show all posts

Wednesday, October 12, 2011

Optical Sensor for Viscous Liquid

This was built for a Varnish Impregnation Unit. It could be Epoxy or some liquid used in Coil-Capacitor Vacuum Impregnation Process. This was fixed behind a Glass Window, when the liquid reaches this level, the circuit senses it and works like a limit detector. Hence the name Optical Proximity Switch. It is fairy simple in design. It worked after a few trials.

IR Pulsing Light Detector

This was a custom design. We always should cost custom designs more, there is more time and materials used up. Only when some quantities are made, you can make it break even. Costing should also involve a R&D component, this is needed to build the in-house lab. Many good firms today, owe their present performance to the research effort and investment done by their predecessors.

InfraRed Detector for Proximity Switch « delabs Schematics

Power Supply for Optical Proximity Switch

Friday, December 14, 2007

Simple Cheap Dark-Detecting LED Circuit

Here's a simple problem: "How do you make an LED turn on when it gets dark?" .....Complete
Simple Cheap Dark-Detecting LED Circuit
Parts -On top: a CR2032 lithium coin cell (3 V). On the bottom (L-R): the LED, an LTR-4206E phototransistor, a 2N3904 transistor, and a 1 k resistor. This LED is red, blindingly bright at 60 candela, in a 10 mm package. It casts a visible beam, visible for about twenty feet in a well-lit room.
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