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Yes..I saw you've used an arrangement of darlington pair Tr, it would be nice if you add a PotRes to control sensitivity of water conductivity, AFAIK water have some resistance to be compensate 'bout amount of current to deliver electrical signal. and bout the Tr I have an idea to change it with pair of Tr + HeatSink to avoid break it at longer time. have you tried this circuit at real Condition sujith..?
Ok thanks for your feedback vina..I think that's so cool you can make AWLC sensor without touching the medium..hmmm..sonic wave maybe..I will waiting fo your update:-)
Hello sujith,very nice simple circuit, btw how 'bout the relay.., is it engaged all the time?, and what kind/type of relay using on this?, coz stable rated voltage n current needed to drive on relay. thanks.
after real implement to water, i have a different result at step 3 that motor should stop after 3 wire connected, if I connected 3 wire directly per step it's worked!, but after i dipped 3rd water into water, relay still at NC state indicate motor still on, was it depend on water conductivity level..?
I want to try this..but may I know what LED do when running sir..? do they flip-flop when relay start pump "On" or else..coz i'm beginner here..thanx for information:-)
Done..!, I've made it..after few try Wire (Probe) Connection Combination with MultiTester on Relay Connector, I got result like this :1. Main - Lower - High = Relay Start Sound + Multitester Nail Moving, its indicating if water below Low Level Pump Motor Start "On" (NC State)2. Main + Lower - High = Relay Stopping Sound + Multitester Nail Keep on Steady measurement like before (No.1), it's indication Pump Motor Still "On" (Still NC State)3. Main + Lower + High = Relay Sound "Clicking" + Multitester Nail Moving to Beginning Value, it was indicate Pump Motor "Off" (NO State) and Loop again to No.1Here some Spoiler for Pic :
Me thanx to you igniting an Inspiration:-D, if u don't mind I have two questions, first I have a circuit consist of four led Water Indicator using four Steel Bolt as water probe and has charged with 9V PS in my tank, so the questions, can I Join or share the probes with your circuit made..?, my plan will use DC-DC Step Up from 5V 1A later separately as PS, or they can be joined as share PS?, Newbie here so need more light:-D, thanks again.