Nixie clock #2 - multiplexing

Previous post: Nixie clock #1

I had to choose my project for embedded systems classes (containing some kind of display, communication module, some other parts like sensors, etc.) and I proposed to continue with my nixie clock. I will have to add automatic time downloading from the internet. I'm going to use cheap & popular wifi module esp8366:

Today I finished my second PCB for this project, board performing signal multiplexing for tubes. Inputs are HV from the boost converter, digit and tube activation signals. On the output correct tube gets power supply and specified number pin is driven. I put a lot of work into it (done in period of 2-3 weeks in the evenings), fortunately the board works:

Nice views by copper & salts during etching so waiting wasn't too boring :)

Serverless architecture

Recently I've heard about idea called "serverless architecture". This is the next architecture proposal for web applications after very popular in recent years microservices. To be short, in this approach developers don't have to care much about server-side infrastructure. Great description can be found at martinfowler.com. Serverless concepts can be found in big providers' platforms like AWS or Azure. As I see on Azure platform there is 1M free function invocations per month what allows to create & start small applications for free. Development can be rapid due to provided integrations (in Azure - Logic Apps) with popular services (Salesforce, Office 365, Twitter, Dropbox, Google services).