17 Jan '15, 11pm

Small, fast solenoid - or alternative. External shutter actuation

I have both the canon digital rebel and the 40D. I looked up the shutter lag on the 40D and it is only 59mS, much shorter than on the Digital Rebel (>100mS). Not quite fast enough I feel, from what Footopa has written. since the camera's Xsync speed is 0.04mS (1/250s), I think that means the shutter is opened fully in less than 4mS. The rest of the 59mS is presumably mirror and metering... I build my own microcontroller triggers. I simply use optocouplers to fire the pretrigger and shutter lines. I suppose one of my gadgets could actually be used to measure the camera's shutter lag under various operational conditions, since it independently fires the camera and flash with a programmable delay between them. Yes, I think I've done this before on a different camera, using a different gadget, and I found that the shutter lag is the absolute shortest delay the camera permits (...

Full article: http://www.electro-tech-online.com/threads/small-fast-sol...

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Dyson is on fast electronics trajectory

Dyson is on fast electronics trajectory

electronicsweekly.com 20 Jan '15, 3pm

Dyson is on fast electronics trajectory no comment Richard Wilson 20th January 2015 Get news by email From being a small p...