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    Can't program legacy devices

    I've been having difficulty programming legacy devices (M, X and X2 devices) with the tool chain that I've used for years. I noticed the problem when I upgraded my Programming Editor software to the version before the current one (5.3.4, I believe) and I continue to have the problem with the...
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    RAM test rig

    For my birthday this year my wife got me a Spare Time Gizmos ELF 2000 kit, a re-interpretation of the original 1802-based computer that I (and many others) built from plans in Popular Electronics. Just like the first one that I built, this one had a few problems when I first turned it on...
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    Background serial reception

    I'm working with the brand new 28X1 I just received, and I'm having trouble with the background serial input. I can't seem to get the proper value set in the scratch pad memory. I'm sending serial data to the 28X1 with an 08M. The command on the 08M is SEROUT 4, N2400_4, (5) On the 28X1 I'm...
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    3.3V power supply

    Hi, I'm playing with a WIZ810MJ module that requires a 3.3V power supply. I'm wondering what I need to convert the 5V power supply on my breadboard to the 3.3V that the module needs. If I was building a 3.3V supply that took power from a wall wart I'd use a 3-terminal regulator, a large filter...
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    Positional performance

    I've been experimenting with Jurjen's Serial Power network. I have a small network set up, and am more than a little confused about a problem that I'm seeing. Here's what's supposed to happen: The master node powers up the network. The slave node turns on an indicator LED, showing that it has...
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    Serial comms voltage divider

    I spent the last couple of nights troubleshooting a frustrating problem with serial commuications. No matter what I tried, I could not get an 18X receive data from my PC on any pin other than the programming serial in pin. I could send data, I could program the Picaxe, I just couldn't get the...
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    First program works!

    30-odd years ago I wire-wrapped a COSMAC ELF computer by following the instructions in the June 1976 edition of Popular Electronics. It took me a few weeks to put it together, and some real head scratching to figure out where I had cross-wired the power and ground. Anyway, once it was running...
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