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Author Topic: 0-10 V analog output / use of buffer  (Read 263 times)
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Hell0,

I need general guidance for this problem.
I am interfacing with a laser controller and need to provide a 0 to 10V voltage to control the laser power.
I am thinking about using fast pwm, filtered by a low pass filter, along with a 2x non inverting op amp configuration to get 0 to 10v.
I can live with 255 step resolution for this application.
My question is on using a transceiver/buffer to interface with the device, to isolate both circuits.
Can anybody help me with the selection of the buffer ?

« Last Edit: April 07, 2014, 11:56:21 am by maminej » Logged

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You need an analog level to the laser, not a PWM signal?
Use a single transistor, lowpass filter its output.


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Quote
My question is on using a transceiver/buffer to interface with the device, to isolate both circuits.
A transceiver/buffer is a digital thing and it does not provide isolation. If you want isolation then put the PWM signal through an opto isolator before sending it to the transistor and filter.
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Isolation is not really needed tho - just separation of the positives of the power supplies.
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Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
Arduino for Teens available at Amazon.com.

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