9 Threads found on edaboard.com: Photodiode Switch
I want to control the Bias and Modulation current of a laser diode using a microcontroller, a DAC and discrete components (including operational amplifiers).
Current range 3mA to 25mA with 0.1mA step.
Current pulses: rise time few nanoseconds, 10% max overshoot
I have found this circuit from TI that controls the current based on its
Analog Circuit Design :: 01-29-2015 04:44 :: GeoAVR :: Replies: 7 :: Views: 658
I am using a photodiode SFH206K (datasheet attached with the mail). The laser light is incident on the photodiode with a frequency of 10 and 20 Hz. Can you suggest me proper value of the RC filter given in the circuit attached with the mail. I tried with R7 = 220K and C55 = 100nF but none of the lights are detected and if I neglect the f
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 06-05-2013 08:01 :: nacoolp :: Replies: 1 :: Views: 552
switch noise: all switch noise and photodiode noise.
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 03-31-2013 10:11 :: samuel :: Replies: 2 :: Views: 385
Hello, Im looking for help to the following problem:
Im sending timing signals with directed narrow angle IR leds. When IR LED switches on I should detect signal with +5V or +3.3V GPIO pin. Most important is to get constant time, lets say?10ns, between IR present and detection. It wouldnt hurt to get long range (3-4m) too.
Hobby Circuits and Small Projects Problems :: 10-24-2010 19:10 :: joonasreunamo :: Replies: 14 :: Views: 5671
I have not being a member of edaboard for a long time so please inform me if I can place this post in a better place. I thought that this would be a good place since PIN diode are used a lot in RF applications, although this is not an RF application.
I need a good source of information (Technical or Application notes) on
RF, Microwave, Antennas and Optics :: 06-16-2009 13:35 :: CVT :: Replies: 4 :: Views: 3666
Why don't you use a photodiode instead.It's worth a try .Anyway your project is fabulous and very exciting
Microcontrollers :: 10-31-2006 01:43 :: ajaykumar988 :: Replies: 2 :: Views: 1250
Your photodiode is in wronge direction, you must reverse the diode direction.
Hobby Circuits and Small Projects Problems :: 05-12-2006 11:19 :: leotim :: Replies: 7 :: Views: 2032
I need suggection for the circuit with following requirements :
- Circuit should withstand against dark current fluctuations from photodiode and maintain its output .
- low OFF current (no more 5 uA)
- low voltage (2 - 4 V)
- switch ON slew rate max 3 usec
- switch OFF slew rate amx 10 usec
- Temperature range -30 - 75 C
Analog Circuit Design :: 02-18-2006 07:24 :: artem :: Replies: 0 :: Views: 998
A problem about an integrator simulation;
when i simulate an integrator ,a warning is followed that missing bulk source(a reset MOS switch ) would be forwardly biased. i do not know why?
1.a photodiode is connected to negative input terminal of operational amplifer.
2. a 2.5v referrence voltage is connected to positiv
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 06-01-2005 23:26 :: samuel :: Replies: 0 :: Views: 912