I have posted many mails previously regarding my ldr based sensor circuit.The purpose of circuit is to turn on or off the relay depending on the intensity of sunlight. Other side of relay is connected to 220v and bulb as a load.
I have built this circuit using four methods.
1. simple transistors.
2. latching transistors.
3. 741 comparator
4. finaly with window comparator and sr latch.
But all circuits have one common problem. At no load all circuits work well but at load on other side of relay flickering of load starts. May be due to AC some noise disturbs relay contacts.I am using electromagnetic relay. What about using solid state relay. I have never used one.
I have built this circuit using four methods.
1. simple transistors.
2. latching transistors.
3. 741 comparator
4. finaly with window comparator and sr latch.
But all circuits have one common problem. At no load all circuits work well but at load on other side of relay flickering of load starts. May be due to AC some noise disturbs relay contacts.I am using electromagnetic relay. What about using solid state relay. I have never used one.