Lawnboy wrote:...I remember that Steve A mentioned somewhere about using a blue sensitive version of a BPW34 but I don't know if that will have enough surface area to compete with the dome sensor, unless I use an array of them if that is even possible.
Careful!! Blue-enhanced, maybe, but at the expense of the other longer wavelengths...in other words they have dumbed-down the sensitivity to red/green/IR etc...you simply can't defy quantum physics.
Yes, you can use several BPW34s at the same time. Simply put them in parallel, apply bias and off you go. Upside is that you get double the sensor current each time you double the number of sensors whereas the non-coherent noise only goes up by 3db per doubling...
Chris, Clint and others have done a lot in this area of weak light detection...
http://www.modulatedlight.org/
Returning to the 'dome sensor'....this is an unknown device which somehow was unearthed by the club. But little is known about it. I did try to find a matching part from a supplier as the Club Shop was running low on these. The last thing I heard was that tests were underway...that was about a year ago...
I think...but I'm not certain, the attached was what I suggested...Farnell stock number 1219006, £3.90++ (one-off).
Steve A.