PCB works - almost!

[stuartpittaway]

I've put together version 1 of the PCB and it appears to work okay - but not as reliable as my breadboard version.

The i2c traffic works for several requests then appears to skip a few requests and then works again for a few more etc. The breadboard version is rock solid.

The ADUM1250 chip took a bit of a bashing when soldering, so this may be the weak point - although it does work intermittently.

[chickey]

Hopefully won't take too long for my boards and surface mount attiny's to arrive. Thinking about it i could breadboard one up quite easily minus the ADUM with it being surface mount.

…

On 26 November 2017 at 10:44, Stuart Pittaway ***@***.***> wrote: I've put together version 1 of the PCB and it appears to work okay - but not as reliable as my breadboard version. The i2c traffic works for several requests then appears to skip a few requests and then works again for a few more etc. The breadboard version is rock solid. The ADUM1250 chip took a bit of a bashing when soldering, so this may be the weak point - although it does work intermittently. — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#3>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ABUmfaM7whCzYT0gIZ9CXdR8FWmDUjd0ks5s6UESgaJpZM4Qquu9> .

[stuartpittaway]

I used some SOIC adapter boards which work quite well.

[stuartpittaway]

Panic over, nothing wrong with the board or ADUM chip - I was using an MCP1702 regulator instead of the 1703A but only feeding the board with 3.3V from supply which caused it to brown out every now and again.

I also think I need to remove the RED led circuit components as the board is pulling a few extra mA current with that resistor network always connected.

[stuartpittaway]

Second panic over, looks like I killed the ATTINY chip during soldering or testing - the ADC on Pin 2 appeared to work, but the reading would slowly drop in value over a few minutes.

Removed and replaced the ATTINY and works fine now.