touch alarm circuit

a very simple touch alarm circuit for mini projects

very simple touch alarm circuit

Required parts

1.speaker
2.bc547
3.resistors
       1.10k
       2.100k
4.diode
5.mobile charger

simple water alarm circuit

                                  water alarm circuit 

here shown water alarm circuit is very simple it can be used as water alarm by using warter alarm we can be relief and sit in house and when water comes and touches the wire the alarm goes on
and it is very very simple only needs 6parts

Required parts

1 .Resistors 1)10  K
              2)100 K
2 .Transistor
               1)BC547
3 .Speaker
4 .Battery
5 .Wires

connect as per fig and enjoy the invenction