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Topic: opto-isolator with HT16k33 (Read 540 times) previous topic - next topic

DBW1341

I'd like to power some 12V seven segment LED displays with an HT16k33 and I'm wondering if I can use some Lite-On 4n35 optoisolators to switch the voltage from 5V.  Are they fast enough to do the job or should I use transistors to switch the voltage?  The datasheet says the 4n35 switch on/off in 3us.

Thanks for any help you might give me.

DBW

Ulli

If your purpose is just seeing the LED shine, then 1ms is a plenty and thy parts are 300 times faster.
2b || !2b
Shakespeare, Hamlet

DBW1341

#2
May 15, 2014, 10:10 pm Last Edit: May 16, 2014, 02:32 am by DBW1341 Reason: 1
So if I was making a large (150 mm high numbers) display, then these would suit my purpose?  Would they cause a flicker worse than car LED taillights?

Thanks.
DBW

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