DiscoverCircuits.com, has 30,000+ electronic
circuits, cross-referenced
into 500+ categories. We have searched the web to help you
find quick design ideas.
We make every effort to link to material posted by the designer.
Please let us if you would like us to link to or post your
design.
The contents &
graphics of Discovercircuits.com are copyright protected.
LINKING to Dave's circuits is permitted but DO NOT COPY any files to your WEB
SITE server
LASER/LED LIGHT OUTPUT INTENSITY METER
This circuit uses a large 1cm X 1cm silicon PIN photo diode and a
transimpedance amplifier to measure the light power output of infrared and
visible LEDs and laser diodes. It can be modified to produce almost any
milliwatts to volts scale factor. It can be connected to either a
multi-meter or an oscilloscope.
LIGHT RECEIVER WORKS FROM 1KHz TO OVER 70MHz
This circuit uses one tiny C-MOS inverter IC to form a modulated light
receiver with a very fast response. It is designed around a PIN photo
diode that is packaged for use with plastic optical fibers. It can be used
as an optical fiber receiver. By using the open end of the optical fiber
it can "sniff" out any modulated light signals.
OPTICAL RFID TEST CIRCUIT
I designed this test the concept of using light techniques to send identification
data instead of RF. A more detailed discussion on this scheme can be found in the
Imagineered new products section.
SINGLE IC FORMS SENSITIVE MODULATED LIGHT RECEIVER
The circuit uses a very inexpensive C-MOS IC that is connected to a small
photodiode. Using a unique inductive feedback network, the circuit provides high
sensitivity under high ambient light conditions. It is a great circuit when you want
to extend the range of an optical remote control transmitter.
Xenon Lamp Flash Detector
This circuit has a very low standby current requirement yet has very high
sensitivity toward the light flashes from a xenon lamp. When connected to a
flip/flop it can serve as an on on/off Controller
