On Thu, Sep 1, 2022 at 04:33 PM, Dr. David Kirkby, Kirkby Microwave Ltd wrote:
I have just ordered a couple of cheap IR photodiodes from RS
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It would be interesting to try these IR photodiodes with a very small lightbulb as the current sensor, where the measured current just brings the filament to the dull red glowing range. Wonder if the increasing resistance with temperature of the filament would be an issue. Possibility causing the filament output to go from barely readable (under range) to bright glow (and over range) over a small current range. Or if operating at the "low" (barely glowing) filament temperatures would mitigate that. Sounds interesting to experiment with.?
Tom, wb6b
