Learn how to control loads using light by building light dependant relay circuits. 3 different methods are detailed, each with unique advantages & drawbacks.
Kit #1: Basic Light Controlled Relay
Based on a LDR (Light Dependant Resistor) & darlington transistors to drive SPDT 10A relay. Adjustable sensitivity.
Kit #2: Light Controlled Relay
Uses a LDR & an Op-Amp. Drives SPDT 10A relay. Less effected by supply & temp. Adj. sensitivity.
Kit #3: Advanced Light Controlled Relay
Uses a LDR & transistors to drive a SPDT 10A relay. Least effected by supply & temp. Adj. sensitivity. WT: .25
