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- Hacker News
- I had no idea what an enlarger was.by Sarkie
- Nice. I have been meaning to do this with an e-ink device but other distractions keep getting in the way.by dofm
- 25$ to unlock all the features...by mmmlinux
- Good idea. I wonder if the iPhone's camera would be able to measure the projected negative and guide exposure time?by sailingcode
- 25 years ago my dad built me a darkroom timer with a relay and a PIC 16F84A. It only had one button that you used a combination of short and long presses to adjust the time (read on a 7 segment LED display) and trigger the exposure.by s0rce
- I get that red-on-black color scheme is a nod to the red lighting of a dark room, but the contrast is so low I can hardly read the example screenshots.by pimlottc
- Very cool. Is it controlling the plugs via direct Bluetooth connection? Or zigbee via a hub, or wifi (direct or via service)?
I always assumed, probably incorrectly, that there would be too much jitter in the actual timing so I had built a few prototypes of e.g. an esp8266 controlled relay, where you would give the MCU a duration rather than separate on/off commands. But I guess that was wildly over-optimizing. In your case, how stable is the delay from the app sending a command until the switch operates?
I'd add voice mode for color printing in total darkness.
by arnarbi