Best optocouplers according to redditors

We found 3 Reddit comments discussing the best optocouplers. We ranked the 2 resulting products by number of redditors who mentioned them. Here are the top 20.

1. uxcell a12080300ux0453 2.54mm Pitch 4 Pins DIP Mounting Photo Coupler PC817 Pack of 10

1 mention
uxcell a12080300ux0453 2.54mm Pitch 4 Pins DIP Mounting Photo Coupler PC817 Pack of 10
Product Name : Photo Coupler;Model : PC817Material : Plastic, Metal;Pin Number : 4Size : 8 x 4 x 7mm/0.3" x 0.2" x 0.3" (L*W*H);Pin Pitch : 2.54mm/0.1"Weight : 3gPackage Content : 10 x Photo Coupler
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2. REES52 16220 Isolated Optocoupler Driver Expansion Board Relay Module 4Ch 5Volt

1 mention
REES52 16220 Isolated Optocoupler Driver Expansion Board Relay Module 4Ch 5Volt
5V 8-Channel relay interface board and each one needs 15-20mA driver currentEquipped with high-current relay, AC250V 10ADC30V 10AStandard interface that can be controlled directly by microcontroller (Arduino, 8051, AVR, PIC, DSP, ARM, ARM, MSP430, TTL logic)Indication LED's for relay output status
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Top Reddit comments about Optocouplers:

u/stevemac00 · 5 pointsr/esp32

Opto PC817 https://www.amazon.com/gp/product/B00S4YRMB4/

Buy 10 for 7$. They take another voltage and turn the signal into 3.3. I've used them for any projects that require an input.

u/sharmajipornwale · 1 pointr/AskElectronics

I'm using this

http://www.amazon.in/Isolated-Optocoupler-Driver-Expansion-Module/dp/B00NR31V3W/ref=sr_1_1?ie=UTF8&qid=1492292084&sr=8-1&keywords=4ch+relay

I tried seperating the VCC , but it didn't have any effect.

Please advise