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Electronics => Projects, Designs, and Technical Stuff => Topic started by: atgeek on August 14, 2017, 05:52:33 pm

Title: Unknown component
Post by: atgeek on August 14, 2017, 05:52:33 pm

I've found a 5V flip flop relay module which use just a 4 pin component for toggle the relay on and off, I've asked to the seller for a better front picture but there aren't any marking on it. Does anyone know what component or IC can it be?

Title: Re: Unknown component
Post by: DBecker on August 14, 2017, 07:26:10 pm

The relay modules typically use an optoisolator as the drive transistor.  But this is for a bistable relay module, using a standard relay.

My guess is that they are using a specialized chip developed for flashlights, with human-scale debouncing driving a flip-flop and output MOSFET.

Title: Re: Unknown component
Post by: atgeek on August 15, 2017, 07:47:15 am

Could it be this one? From the translation it should be a timer chip.

Title: Re: Unknown component
Post by: bjcuizon on August 15, 2017, 07:51:01 am

Yeah, its probably a timer cause the silkscreen on the board says V (for vcc), G (for gnd), and T for timer??? ???

Title: Re: Unknown component
Post by: zeqing on August 15, 2017, 08:27:47 am

a MOSFET, the "T" means "Trigger".. i think

Title: Re: Unknown component
Post by: Benta on August 15, 2017, 09:01:12 am

I'd say "T" means "toggle".

Title: Re: Unknown component
Post by: DBecker on August 15, 2017, 02:03:30 pm

It's not the toaster timer chip shown.  The functionality is different, the pinout differs, and the chip on the module is able to drive the relay coil directly.

I'm still going with a power toggle used on LED flashlights, although I couldn't immediately find a matching chip.

Title: Re: Unknown component
Post by: atgeek on August 15, 2017, 06:28:38 pm

Would be really interesting know what kind of chip it is  :)