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   pat (thatcrazydude@noagendasocial.com)'s status on Thursday, 12-Oct-2023 20:10:51 JST pat

   Hey did anyone fere try using SN74HC595N shift register to control one of them china relay boards? If so, can you hook up the output pins directly? I'm kinda looks for a solution that won't require fuckin' with 8 transistors per board

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     Sir Funk ?? (sophistifunk@noagendasocial.com)'s status on Thursday, 12-Oct-2023 20:10:51 JST Sir Funk ??

     in reply to

     @ThatCrazyDude isn’t the whole point of relays not using transistors?

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     Sir Funk ?? (sophistifunk@noagendasocial.com)'s status on Thursday, 12-Oct-2023 20:12:03 JST Sir Funk ??

     in reply to

     @ThatCrazyDude what’re you building? Solenoid controlled irrigation?

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     pat (thatcrazydude@noagendasocial.com)'s status on Thursday, 12-Oct-2023 20:12:22 JST pat

     in reply to

     • Sir Funk ??

     @Sophistifunk absolutely. The thing is though that they need certain amount of current to switch on, and most 3.3V microcontrollers won't deliver enough, so you need to amplify the output

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     AdamAtSea (adamatsea@noagendasocial.com)'s status on Thursday, 12-Oct-2023 20:14:04 JST AdamAtSea

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     • Sir Funk ??

     @Sophistifunk @ThatCrazyDude What are you planing on using to drive the relays?

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     pat (thatcrazydude@noagendasocial.com)'s status on Thursday, 12-Oct-2023 20:15:39 JST pat

     in reply to

     • Sir Funk ??

     @Sophistifunk this particular thing will be for floor hearing in a not-so-mini greenhouse. I want 8 separate zones so I can set different temperatures in different parts

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     Sir Funk ?? (sophistifunk@noagendasocial.com)'s status on Thursday, 12-Oct-2023 20:18:28 JST Sir Funk ??

     in reply to

     @ThatCrazyDude

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     Sir Funk ?? (sophistifunk@noagendasocial.com)'s status on Thursday, 12-Oct-2023 20:19:41 JST Sir Funk ??

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     • AdamAtSea

     @ThatCrazyDude @AdamAtSea if you’re going to all that work, don’t cheap out and accidentally kill everything in a couple of zones to save $20.

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     pat (thatcrazydude@noagendasocial.com)'s status on Thursday, 12-Oct-2023 20:19:42 JST pat

     in reply to

     • Sir Funk ??
     • AdamAtSea

     @AdamAtSea @Sophistifunk esp32 was the original idea. But if I can do that with a shift register for like 10 cents, I'll prolly go with esp8266.

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     pat (thatcrazydude@noagendasocial.com)'s status on Thursday, 12-Oct-2023 20:47:19 JST pat

     in reply to

     • Sir Funk ??
     • AdamAtSea

     @AdamAtSea @Sophistifunk yeah, those I have definitely use opto-couplers for galvanic insulation and they seem to have some sort of transistors too. But I can't find a datasheet that would be of much use. They'll tell ya they want 3 to 6 V logic, but that's about it. Nothing about the current. And yeah, I do need at least 4 GPIOs extra.

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     Sir Funk ?? (sophistifunk@noagendasocial.com)'s status on Thursday, 12-Oct-2023 20:47:19 JST Sir Funk ??

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     • AdamAtSea

     @ThatCrazyDude @AdamAtSea if it’s an OC it’s just enough to drive an ir diode, right?

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     AdamAtSea (adamatsea@noagendasocial.com)'s status on Thursday, 12-Oct-2023 20:47:20 JST AdamAtSea

     in reply to

     • Sir Funk ??

     @ThatCrazyDude @Sophistifunk It looks like that other board uses optocoupler to drive the relays, just put 3-5v on the appropriate pin and it should trigger, unless you need additional GPIO for other stuff.

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     AdamAtSea (adamatsea@noagendasocial.com)'s status on Thursday, 12-Oct-2023 20:47:21 JST AdamAtSea

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     • Sir Funk ??

     @ThatCrazyDude @Sophistifunk You can get a 8-channel relay board with an esp8266 onboard. No bread-boarding needed.

     https://www.aliexpress.us/item/3256802085491801.html

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     pat (thatcrazydude@noagendasocial.com)'s status on Thursday, 12-Oct-2023 20:47:21 JST pat

     in reply to

     • Sir Funk ??
     • AdamAtSea

     @AdamAtSea @Sophistifunk yeah, but I already have the really boards and like 20 WeMos D1 minis collecting dust, so.... ;)

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     pat (thatcrazydude@noagendasocial.com)'s status on Thursday, 12-Oct-2023 20:55:30 JST pat

     in reply to

     • Sir Funk ??
     • AdamAtSea

     @Sophistifunk @AdamAtSea you actually have two LEDs in series there (one red indicator LED and whatever sits inside the OC)