LDR Array for Solar Tracker

thingiverse

This is a simple test rig for a little solar tracker I'm building. Hence the dummy LDR I uploaded yesterday.http://www.thingiverse.com/thing:858043 Analogue pin A0 for pair 1 & 2 Analogue pin A1 for pair 3 & 4 Test pin 9 (raise to HIGH to test) -Saves power - though not sure how much(!) Gnd - LDR1 - A0 - LDR2 - +ve(pin9) Gnd - LDR3 - A1 - LDR4 - +ve(pin9) TWO Sets of 2 LDRS WITHWIRED IN SERIES BETWEEN +ve (pin9 to HIGH) and Gnd. Pin A0 is central to the two LDRs. LDR LAYOUT: 1 ! 4 3 ! 2 1 & 2 is a set, 3 & 4 is a 2nd set. 1 & 3 GND; 2 & 4 +ve (or Check Pin) Choice Table: CASE 1: A0 High A1 High MA Right CASE 2: A0 High A1 Low MB Down CASE 3: A0 Low A1 High MB Up CASE 4: A0 Low A1 Low MA Left Other more complex cases: when three are shaded or partially shaded. Sorryy, This is random tired writing. I'm turning in for the night. EurIng Andy Southern aka Bath Robotics