Bill of Material for D:\PROJECTS 2025\IC-705_BT_TTGO_\XPA-125\V3.Sch

This BOM is to suit IC-705 Bluetooth band decoder PCB, V3 101125
Dec 2025 VK3PE

Used Part Type             Designator           Footprint  Description                                
==== ===================== ==================== ========== ========================================== 
2    100K                  R11 R24              1206-0805                                             
4    100nF                 C3 C4 C6 C7          1206-0805                                             
1    100R                  R5                   1206-0805                                             
12   10K                   R1 R10 R13 R14 R15   1206-0805                                             
                           R2 R3 R4 R6 R7 R8 R9    
2      10k                     R14, R15               NOTE< MISSING on V3 PCB !                                    
2    1N400x                D1 D2                AXIAL0.4     any 1N00 series diode (axial)                                         
1    1uF/10V               C2                   RB.1/.2    polarized cap                              
1    22uF                  C5                   CAP_6X6    polarized cap  SMD type                            
5    2N7000                Q1 Q2 Q3 Q4 Q5       SOT-23-123       smd FET                                     
1    47K                   R12                  1206-0805                                             
1    47uF/25V              C1                   RB.1/.2    polarized cap                              
1    LM7805T                 U3                   TO-220   
1      Heatsink W273 type                         NOTE requires minor mod to fit on PCB
1      m3 x 10 nut & bolt for heatsink.                    
1    BSS84                 Q22                  SOT-23-123                                            
1    ESP32 TTGO            U2                   DIP24-W    ESP32 TTGO module                               
1    HEADER 4              J4                   SIP4       Header male 0.1" pitch                                           
2    HEADER 10             J5 J6                SIP10      Header, 10-Pin                             
4    HEADER 2              J1 J2 J3 J9          SIP2       J2 is optional, not used.  
1    Header-female 2 pin   for power input on J1                                         
1    HEADER 3              J7                   SIP3                                                  
1    HEADER 8              J8                   sip8      
     Header female to suit above connectors for bands out etc etc.                                            
1    LMC662                U6                   DIP8      optional for Analog "band' output                                            
1    MCP23017-E/SO         U1                   SOIC-28                                                 
1    MOSFET P NDT452AP     Q22A                 SOT-223       alternate to Q22                                        
2    ULN2803A (DIP18)      U4 U5                DIP18      HIGH-VOLTAGE,HIGH-CURRENT DARLINGTON ARRAYS 

MISC
1   ILI9341 type TFT display 2.8" See pictures.
2   spacers tapped 3mm, 10mm long.    
    May require additional spacers to mount this assembly to front panel.
    M3 metal threads (bolts)and nuts as required.
    
NOT INCLUDED
    wire to connect to the external PTT out and bands decodes.