ripnet.us
https://ripnet.us
My page about stuffFri May 8 14:22:18 2026 / +0000 GMTUniversal Post Manager 1.1.2 [ www.ProfProjects.com ] Finishing up the lights interface
http://ripnet.us/?p=202
Fri May 8 14:22:18 2026 / +0000 GMThttp://ripnet.us/?p=202
Mmmm they look so purdy :)
Doing some continuity checks before I begin soldering and risk blowing components up
Most parts are on, save the I2C resistors and the heat sinks. Time to program the microcontroller:
It works!
Let's hook up the scope to see what our I2C signals look like.
Holy moly they're awful with the ATMega328's built-in pullup resistors. Fortunately I left spots on the PCB to add my own. I ended up with 2.2k ohms. Nice edge transition, not too much current.
After the external pullup resistors:
Now the hard part... running the damn wires through the walls. I'll update later on.
]]>2022015-06-11 21:04:512015-06-12 01:04:51
Mmmm they look so purdy :)
Doing some continuity checks before I begin soldering and risk blowing components up
Most parts are on, save the I2C resistors and the heat sinks. Time to program the microcontroller:
It works!
Let's hook up the scope to see what our I2C signals look like.
Holy moly they're awful with the ATMega328's built-in pullup resistors. Fortunately I left spots on the PCB to add my own. I ended up with 2.2k ohms. Nice edge transition, not too much current.
After the external pullup resistors:
Now the hard part... running the damn wires through the walls. I'll update later on.
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