Universal PCB relais / I/O / NEXTION display

[adval40]

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

[ThomasB]

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]

Transistor is inside Q1 bc557

Ad (adval40)

[ThomasB]

Transistor is inside Q1 bc557

Very good!

- Thomas

[Redy321]

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

I know that there are many services that can help with this. I am interested- how much it costs? I had another question but also on this topic, I decided to make a circuit check and looked for this service, it helped me because I would have an old monitor and I did not understand why I had errors. My wife remembered that she had a similar problem as me and helped me find that service. I spent a lot of time searching... As a result, they fixed the monitor:) I like to play computer games, so the monitor was important to me. To be honest I am not an expert but I hope this information helps you.