Universal PCB relais / I/O / NEXTION display

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adval40
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Joined: 04 Apr 2017, 23:14

Universal PCB relais / I/O / NEXTION display

#1 Post by adval40 » 28 Apr 2019, 02:30

I have make some PCB for esp8266

It's a universal board with several I/O
included 220 powersupply
2x I2c
1x Nextion Display
4x Relais NC / NO
1x 4 outputs ttl
1x 8 Input/output

1x expansionboard

adval40
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ThomasB
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Location: USA

Re: Universal PCB relais / I/O / NEXTION display

#2 Post by ThomasB » 29 Apr 2019, 17:31

Nice work, thanks for sharing.

The Nextion's hardware serial I/O needs a transistor buffer to prevent boot lock up. See the wiki:
https://www.letscontrolit.com/wiki/inde ... le=Nextion

- Thomas

adval40
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Posts: 23
Joined: 04 Apr 2017, 23:14

Re: Universal PCB relais / I/O / NEXTION display

#3 Post by adval40 » 30 Apr 2019, 21:03

Transistor is inside Q1 bc557

Ad (adval40)

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ThomasB
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Joined: 17 Jun 2018, 20:41
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Re: Universal PCB relais / I/O / NEXTION display

#4 Post by ThomasB » 30 Apr 2019, 23:59

Transistor is inside Q1 bc557
Very good!

- Thomas

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