|
 |
DiscoverCircuits.com -- Hobby Corner
Last Updated on:
Wednesday, June 02, 2021 03:48 AM
Hobby Circuits List
The contents &
graphics of Discovercircuits.com are copyright protected.
LINK to Dave's circuit, but DO NOT COPY any files to your WEB
SITE server |
|
|
|
|
More
Receiver Circuits |
|
2uS Light Pulse
Receiver |
|
Although the LF357 is an obsolete part, this circuit gives you an
idea how to build a sensitive modulated light detector with high ambient light
immunity. The first section uses a 100mH inductor as an efficient photodiode
current to voltage conversion circuit. |
|
|
|
|
The
second circuit performs much the same function but boosts the voltage generated by
the first circuit by a factor of X20 and filters out lower frequencies.
Overall, the conversion factor is about one volt per microwatt of light.
Daylight noise is typically less than 30mv peak to peak. The frequency
response peaks at about 250KHz. Although I have not tested it, I think the
Texas Instruments TLC081 should work in this application. |
|
|
Click on Circuit Below to view PDF of Schematic |
|
 |
|
|
|
More
Receiver Circuits
Hobby Circuits List
eMail David A.
Johnson, P.E. about this circuit |
