INT _ Unipolar  
 LED switch _ Light emitting diode (red)  
 C1-C4 _ Chemical capacitors of 330μF  
 C2 _ Chemical capacitor of 2,2μF  
 C3 _ Chemical capacitor of 100μF  
 C5 _ Plastic capacitor of 220 Nf  
 C6 _ Ceramic capacitor of 150Pf  
 R1-R4 _ Resistors of 470 Homs  
 R2 _ Resistors of 1 Khoms  
 R3 _ Resistors of 2.2 Khoms  
 R5 _ Resistors of 1 Homs  
 CI 1 _ TBA 820 M (8-pin box)  
 Support integrated circuit 8 pins.  
 Pressure for 9 volts battery