PCB V1.0 BOM

Majority of the BOM is below. I have a large collection of SMD parts and some other parts I used so do not have part numbers for every part.

There are footprints for 3 12V-5V power regulator options. The 7805 can bolt to the board, the solder mask should be removed. A DROK 15W DC-DC converter can bolt on and connects via header. I ended up using a LC78_05-3.0 3 terminal compatible DC-DC converter. It is small and requires no heat sink. I am also using one in my Teensy SDR motherboard PCB and no noise issues. I listed the LC_78_05-3.0 below.

Optional displays. None are required if using for band decoder only or remote monitoring only. For my remote located unit I have a small OLED installed. For indoors usage I have layouts for both 2.4” and 3.5” Nextion displays. Can still use the remote monitor/control which is best for calibration.

Optional 0.96” OLED display (SS1306 i2C connected) (https://www.amazon.com/gp/product/B01HEBIJKK)

Optional 2.4” or 3.5” Nextion intelligent display (RS232 TTL connected) (https://www.amazon.com/gp/product/B08535V3KW) These often come ion various combo packages. 2.4 or 3.5” is supported today.

1 to 2A pico fuse There are pads for 2 diodes. They likely won’t fit standard diodes cable of 1A or more. The power traces are wide so you should scratch off the solder mask and tack your choice of power diode in place. D1 is reverse polarity protection in series, D2 is shunt (blows the fuse if reverse polarity). I chose to not install D2 since D1 is good enough. I used a 1.5A pico fuse. You can use a resettable fuse also. One of my mods is to take over an extra Port A ground pin and wire 12V to it via a 0.17A resettable poly fuse. This feeds a remote 12VDC relay inside amplifiers that turns on AC power when the correct band is selected. Port A bit 0 (PA0) closes to ground to energize the relay. Other port pins for other amps. Since only 1 amp is on at a time in my scheme a 0.17amp supply is enough. Set fuse size for the worst case relay. The optos can handle up to 500ma if they are driven to full on state.

QTY 1 Aluminum case (https://www.amazon.com/gp/product/B07VSMXFBF) The PCB was sized to slide into this case but there are seve3ral standard PCB mounting holes for any suitable case.

QTY 1 PART: ADL5519 from SV1AFN.com DESC: 10GHz dual log detector module

QTY 14 PART: MOCD223R2VMCT-ND MFG : ONSEMI (VA) / MOCD223R2VM DESC: OPTOISOLTR 2.5KV 2CH DARL 8SOIC

QTY 1 PART: EG5547-ND MFG : E-SWITCH / PB400EEQR1BLK DESC: RIGHT ANGLE PUSHBUTTON SWITCH

QTY 1 PART: 3182-LC78_05-3.0-ND MFG : GAPTEC ELECTRONIC GMBH & CO. KG / LC78_05-3.0 DESC: DC-DC POL

QTY 1 PART: AE10921-ND MFG : ASSMANN WSW COMPONENTS / A-DF 09 A/KG-T2S DESC: CONN D-SUB RCPT 9POS R/A SLDR

QTY 1 PART: AE10961-ND MFG : ASSMANN WSW COMPONENTS / ASUB-277-15TP26 DESC: CONN D-SUB RCPT 15POS R/A SLDR

QTY 1 PART: 2092-KLPX-0848A-2-B-ND MFG : KYCON, INC / KLPX-0848A-2-B DESC: CONN RCA PHONO JACK R/A BLACK

QTY 1 - Optional – can leave off or not install the ribbon cable if not using the ethernet remote control/monitor. Can use the Teensy USB port. The USB portion is for the Teensy USB Host port and is not used today so you do not need to run the cable for that. The selection of this jack was mostly for testing and future use such as with the RS-HFIQ board (not likely, other boards have been designed since). PART: 535-12442-ND MFG : ABRACON LLC / ARJE-0032 DESC: CONN JACK 1PORT 100 BASE-T PCB

QTY 1 ADS1115 16 Bit 4 Channel I2C module (https://www.amazon.com/gp/product/B08HLYKXC6)

QTY 1 DC Coaxial 3 pin power jack, PCB mount. (https://www.amazon.com/gp/product/B081DYQSC9)

QTY 1 LED green – junk box

Variety of single row header sockets Variety of SMD caps – most are power bypass caps. 0.01 to 0.1uF work. A couple Tantalum SMD caps- size not critical – 22 to 47uF common Most of the resistors are opto-coupler input current limiters and are 1Kohm on a 3.3VDC supply. 1-2ma is the target current for each opto LED input. 2.2K for example only partially turns on the output transistor form 3.3V Teesny output pin. The output optos are all on 3.3V. The input (BAND0-5, PTTIN) opto couplers inputs (common return) are all floating and powered from external source. Size the resistors accordingly. I am using 12V for example from a level converter inside my shack 100 wire feet away. You can elect to connect the floating common return to the system DC ground.

Most SMD pads are 0805 size and I used 0603 size no problem since I had a lot of them around.