This is small high volts shock circuit, pressure from the low current. It is perfect for fun play. In circuit has a few component just two small NPN transistors, 2 resistors and a transformer. So easy to builds and cheap!
When switch S1 closes the circuit for feed power supply gives with Q1 and Q2. By current flow through the coil of the transformer of the primary and touch limit the current with R1 and R2 already change come in pin way B of Q1 and Q2.
It makes Q1 and Q2 biased by a transistor that bilateral alternate work all the time. When Q1 bias make have current flow change during a half on of coil primary and when Q2 make have current flow during a half below of coil primary.
Which work alternation of Q1 and Q2 can make be the electric current alternates to come out at coil secondary cell building this circuit should use the carefulness. because of might cause danger from the electric alternating current.
I test the circuit on the breadboard.
Note: You can use many transistors that is NPN type and small size. (I use C458 or C1815 or C828) This circuit can assemble on a breadboard. or Universal board PCB.
And use current of about 34.6mA at voltage supply is 8.4V, which can provide the output of ACV-203V
And use a small transformer 0.25A as video below.
If I test to think about current output. as principle Power in = power out (around..)
Power in = V x I; V(battery) = 8.4V and I(current of circuit) = 34.6mA
Power in = 8.V x 34.6mA = 290mW
So, Power out also about = 290mW
Iout = 290mW / 203V = 1mA
It is low current only.
Parts you will need
Q1,Q2: 2SC1815, 2SC458, 2SC828 NPN transistor
R1,R2: 10K 0.5W Resistors
T1: 220V AC primary to 9V-0-9V,250mA secondary transformer
—In US uses 110V AC primary. But it has low voltage up to about 110V.
I love electronic circuit. I will collect a lot circuit electronic for teach my son and are useful for everyone.