linux-works
Four Digit Nixie Display
Building a 4 digit nixie display for some IoT experiments ;)
Overall plan:
Allow this to run local 'apps' and also listen to announcements (broadcasts over serial or xbee) and if configured as such, interpret the announcements and render the relevant parts to the display; in this case, 4 digits of pure numeric and possibly a single RGB status element.
Tech details:
Using arduino nano v3 (rear, with usb), 2 philips pcf8574 i2c port expanders (to bcd drive the nixies), some russian equiv 74141 bcd to decimal drivers, and some US sourced nixie tubes, same series that heathkit often used in their frequency counter kits. there is a commercial/ebay dc/dc converter module (in hot-glue) for the 170v needed for the nixies. the other tall module is a reasonable decent realtime clock (RTC) module, ds3231, commonly found on ebay and even amazon for $10 or less. its identical (even in using the same i2c addr) to the ds1307.
Four Digit Nixie Display
Building a 4 digit nixie display for some IoT experiments ;)
Overall plan:
Allow this to run local 'apps' and also listen to announcements (broadcasts over serial or xbee) and if configured as such, interpret the announcements and render the relevant parts to the display; in this case, 4 digits of pure numeric and possibly a single RGB status element.
Tech details:
Using arduino nano v3 (rear, with usb), 2 philips pcf8574 i2c port expanders (to bcd drive the nixies), some russian equiv 74141 bcd to decimal drivers, and some US sourced nixie tubes, same series that heathkit often used in their frequency counter kits. there is a commercial/ebay dc/dc converter module (in hot-glue) for the 170v needed for the nixies. the other tall module is a reasonable decent realtime clock (RTC) module, ds3231, commonly found on ebay and even amazon for $10 or less. its identical (even in using the same i2c addr) to the ds1307.