#mcp795w20

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Adventures with real-time clocks - part 1

Adventures with real-time clocks - part 1 - adding an RTC to my homebrew computer.

So I decided that I’d like to add a real-time clock (RTC) to the Zolatron project because … why not? Should be easy, I thought. Lots of people have done it. All I need is the right chip. Maybe that’s where I made my mistake. MCP795W20 RTC pinout As it turned out, for some reason, I already own three copies of the Micrcship MCP795W20. Why I have these and how long I’ve had them are mysteries to…

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[speculatrix]

Adventures with real-time clocks – part 2

Adventures with real-time clocks – part 2 #rtc #Arduino

The story so far: I’d been tinkering with an MCP795W20 real-time clock (RTC) chip and having a frustrating time of it. Weird things were happening. It seemed very finicky. I’d put part of the problem down to using a breadboard (still think I’m not entirely wrong about that). It turns out, however, that the biggest problem was my own stupidity. I’d used entirely the wrong values for the load…

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