(How To) Measure Energy Consumption of your House

[raas]

Hi Raas,

Can you tell me Which type of LDR you are using with the 1k resistor ?

(i.e. What resistance in Light and what resistance in dark)

Or do you happen to have a conrad part number??

Sure,

Here are the partnumbers from conrad:

2 x 1k resistor: 405256 - 89

2 x LDR : 145483 - 89


1 x Velleman interface board: 191003 - 89

I don't know exactly for the resistance (or better, the difference.)
I seems like that the voltages don't go exactly 5v and 0v , but the difference in voltage is high enough for the velleman board to tell the difference between hi/lo, even if there's only a 100 msec. blink of the led. the velleman senses it, and counts it.
I believe the max resistance of the ldr is 1k.

HTH.