ESP8266 Community Forum

- Wed Nov 23, 2016 5:02 pm #58587 Looking for help in integrating an ESP into the circuit in the photos. The device is a wireless (not WIFI) plug. They come in a 3 pack with 1 remote form Costco around $20. On the inside of this device there is a small board with a relay on it. The mains voltage is dropped to 24VDC initially and then to around 5VDC to control the ICs. The relay coil is controlled by a NPN transistor at 24V and 5V. The part I don’t know is the chip U1 and U11. I guess that U1 is another type of transistor as it outputs 5V to the NPN and also on another pin to a status LED. U11 is for the wireless I guess. When you first plug in the device it goes into a sync stage for the remote (blinking LED) and then just works On (LED on) and Off (LED off). Can anyone recognize the 2 U chips? I tried shorting the NPN to 5V but it seems to shutter on and off sometimes and other times just turn on the relay.

Anyone out there a super electronics guru?

I know that I will need 3.3V to power the ESP. Hope to tap off the 5V with another regulator.

Thanks in advance.

Here are the photos they are in a google drive.

https://goo.gl/photos/iaVH1QSd8zYrG7TR6
https://goo.gl/photos/GtPhboDd7N9S3CSv8
https://goo.gl/photos/iUWe7d6W6VojquL47
https://goo.gl/photos/Spg1uzMnhd4Gc4Vh6

- Thu Nov 24, 2016 2:40 am #58601 that tranformerless power supply may not be enough to power your esp.
but you seem to have space for 5v/3.3v ac-dc module

- Thu Nov 24, 2016 8:23 am #58616 Yes thank you for that. I was wondering if it had enough to power the ESP. The box has lots of room. May get a cheepo 5V USB wall charger at the dollar store strip it down and add it in. Do you have any idea on the U1 or U11 on the board?

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FOR ANYONE THAT MAY FOLLOW THIS AND COPY. THIS IS A CIRCUIT WITH MAIN AC POWER.
IT CAN BE VARY DANGEROUS IF YOU DON'T KNOW WHAT YOU ARE DOING!!!
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