This is how to remove the high voltage camera flash pcb from a disposable camera. You can use this to revive nicad batteries, make sparks, electric shocks, mini taser, zap, zapper etc.
Warning – this circuit produces about 350 volts and could be dangerous in some circumstances.
This was a test of a papercrete rocket stove. Papercrete is made with cement, sand, paper mulch and water and has greater insulating properties than concrete.