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SmartLid User's Guide

Tim Gilbert

SmartLid User's Guide

A lesson every engineer needs to learn: first, write the user's guide. No real engineer likes this idea but they either listen to the crusty old geezer who's been around forever, or they learn it the hard way. You can put a lot of time and energy into a really awesome design only to realize, after the prototype is built, that you need one more button. Yeah, learning things the hard way tends to be embarrassing, not to mention expensive. So, since I'm now the old geezer that's been around forever, I took my own advice and wrote the user's guide....

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SmartLid: digital tools for an analog world

Tim Gilbert

SmartLid: digital tools for an analog world

Thanks to everyone who sent us feedback on the SmartLid concept. You might note that the above rendering has changed a bit. However, the basic spec's haven't: Temperature range: 32F - 120F Accuracy: +/- 0.5 F Fahrenheit or Celsius display Elapsed time to 24 hours (for people doing really crazy stand development.) Battery powered Water resistant keypad Average temperature function User calibration function Note the buttons aren't labeled since we're still working out the details. We need to get the display right the first time; changing it later is expensive. Same for the keypad. Regarding those details, several suggestions were...

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SP-257A: processing 5x7 in the SP-445

Tim Gilbert

SP-257A: processing 5x7 in the SP-445

A while back I accidentally bought a Kodak #33A 5x7 view camera. I say accidentally because the Speed Graphic I went to look at turned out to be in rough shape, but he also had the Kodak. I just couldn't resist the beauty of this old classic.I figured I'd pull the prototype of the SP-457 processing tank out of storage, tweak it enough for me to process a few sheets and then put the camera on display.However, the prototype needs a lot of tweaking and frankly, it's awkward to handle. (Both when loading film and actually processing film.) I also...

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The Product Development Process and the SP-445

Tim Gilbert

The Product Development Process and the SP-445

A short course on product development centered around the SP-445 film tank.

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Quick fix for old O-rings

Tim Gilbert

Quick fix for old O-rings

So last night I started to process some film and realized that the tank I usually use was still damp. So I grabbed another from the shelf over the sink and loaded it up (using my latest dark box of course.) I filled it with SP-76EC, squeezed it and started agitating. It dripped. I re-squeezed. It still dripped. I thought about putting it back in the dark box and swapping lids but it wasn't leaking that badly, so I kept going. I figured the O-ring was worn out since it was one of the very first tanks built. (Kind of...

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