L1-L2:1 MH
L3-L4:4.7 MH
DD1.1-DD1.2-DD1.3: CD4093
SR1: 7805 REGULATOR
T1-T2: BSS88 MOSFET TRANSISTOR
D1-D2: UF4007 FAST DIODE
LED1: 3MM OR 5MM LED
TR2516T1 4 PIECES (THE MOST CRITICAL MATERIAL THAT 25KHZ TRANSMITTERS, 40KHZ WHICH HAVE PILLARS IN THE MARKET MAY NOT WORK DATASHEET:
sensorelement.com/ut/Open%20type.pdf)