12-14-2021, 12:13 PM 
	
	
	
		Light sensor setup worked really well with a quite old phone (GT-i9300)!
No black box needed.
It's a 10 F capacitor and a 3.5 V 0.5 A lightbulb.
Could be worth while to pin down the lightbulb's illuminance v. voltage dependence.
Best regards.
//Erik
	
No black box needed.
It's a 10 F capacitor and a 3.5 V 0.5 A lightbulb.
Could be worth while to pin down the lightbulb's illuminance v. voltage dependence.
Best regards.
//Erik

