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I dropped the plan of the above circuit because the problem is caused by the pnp is not solvable by me
So I got a good Sch from net tested and working
**broken link removed**
I want ask few things I edited the circuit a little
Pnp transistor is for empty water in the circuit
So pnp...
The relay doesnt work even after adding the diode
Thx for the flyback solution I read the PDF. I just now know that we should always use flyback. Gnd -->|-- positive on relay coil is that right ? Also why doesn't the relay work ? In my case.
Hello
I want to build a circuit which will alert me when oht is overflowing and when it is empty*
This is the circuit I build using google
Please refer to the image schematic
R1220k
R2 22k
BC557 pnp transistor (empty)
Bc548 npn transistor (overflow)
Relay 6 or 12v
Power supply 9 or 12v
Probe H...
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