The Journal is a direct export from Hack Club Stasis and may have formatting issues. Time is in UTC.

3/26/2026 2 AM - Everything Done!

Time spent: 0.01666666666666667h

1 min logged as I need to log some time for the journal.

Everything has been completed, as per the Submission Guidelines.

Checklist

• Originality - yes, this is my project.
• Shipped and complete:
• CAD assembly with all electronics and parts - Yes
• Firmware present - yes (mobiflight)
• Sanity checked - yes
• 3D Render - “render”-ish, but yes.
• BOM in CSV - Generic and Stasis, yes.
• PCB source files - Gerber, yes.
• Any other files - Mobiflight config files, etc, yes.
• STEP files for CAD files, yes. (cad/)
• Readable and organized into folders, yes.

Readme:

• Description - yes
• Sentences on why - yes
• Pictures - plenty, yes
• Screenshot with full model - yes
• PCB screenshot - yes
• Wiring diagrams - yes (schematic)
• BoM in table format - yes

3/25/2026 7 AM - README (In Stasis Copy)

Time spent: 2h

Rest of completed Readme and BOM in Github

A320RMP

A320 Radio Management Panel

Made for MSFS2020, MobiFlight, RP2040, and the FlyByWire A32NX

What is this?

The A320RMP is a small desktop radio management panel for use with Microsoft Flight Simulator and MobiFlight, and is based off the Raspberry Pi RP2040 platform.

Why was this made?

While flying on VATSIM with MSFS2020, I realized it was very difficult to switch frequencies through the mouse and scroll wheel in the FlyByWire A32NX. So, here is my version of the A320 RMP.

Pictures

Schematic

img/schematic.png https://stasis.hackclub-assets.com/images/1774469948065-c5vn6g.png

PCB Only

img/pcb.png https://stasis.hackclub-assets.com/images/1774470086891-i2ej90.png

CAD / Models

Knob

img/knob.png cad/knob.step https://stasis.hackclub-assets.com/images/1774470168708-qcuh1a.png

Case

https://stasis.hackclub-assets.com/images/1774470365832-sbevvn.png

Lid

https://stasis.hackclub-assets.com/images/1774470316983-m36m6g.png

Buttons

https://stasis.hackclub-assets.com/images/1774470339608-9jjzfl.png

Final Render

BoM

WIP - Check Stasis

A320RMP wouldn’t be possible without:

• VATSIM, https://vatsim.net
• FlyByWire Simulations, https://flybywiresim.com
• Oakland vARTCC, https://oakartcc.org
• Hack Club, https://hackclub.com
• Stasis, https://stasis.hackclub,com

And most importantly,

• @witherman3000, https://witherman3000.com

Thanks for looking through my project! 5NN THX FER RPRT DE KO6LVM SK CL

3/25/2026 4 AM - Github, Readme, and Knob

Time spent: 1.5h

Knob

Knob - made in Onshape, from encoder specs from LCSC

Github

Uploaded:

• PCB STEP
• PCB Gerber
• Case STEP
• Lid STEP
• Button STEP
• Knob STEP
• Mobiflight MFMC
• Mobiflight MFPROJ
• https://github.com/ko6lvm/A320RMP

README

WIP - on local disk. Will be uploaded ~26-27th.

3/25/2026 2 AM - MobiFlight Firmware

Time spent: 2h

• Firmware and project file uploaded to Github
• HF1/HF2/SEL/AM LEDs not configured due to those variables not present in A32NX MobiFlight presets
• Everything else programmed into MobiFlight
• Rotary encoder button as of now does not do anything

3/24/2026 9 PM - MobiFlight Pins

Time spent: 2h

Multiplexer

Data

Name	IC Pin	Pico GP
S0	10	GP0
S1	11	GP1
S2	14	GP2
S3	13	GP3
C I/O	1	GP4

Buttons

Name	IC Pin
SW(N)	L(N)
i.e. S2	L2

Rotary Encoders

SW13 (Left, MHz)

Name	Pico GP	Purpose
A	GP5	Left
B	GP6	Right
E	GP7	Button

SW14 (Right, KHz)

Name	Pico GP	Purpose
A	GP8	Left
B	GP9	Right
E	GP10	Button

LEDs

Name	Pico GP	Purpose
U3	GP14	VHF1
U4	GP15	VHF2
U5	GP16	VHF3
U6	GP17	HF1
U7	GP18	HF2
U8	GP19	SEL
U9	GP20	AM

7 Segments

Uses MAX7219, 6 digits each. Data cascaded into U11 from U13 DOUT, only U13 recieves DIN from Pico/MobiFlight. All data is ran through Logic Level Shifter (Shifter pins used in place of MAX7219 pins)

U11-LED2 and U13-LED3

UA in Name states Both U11 and U13

Name	Pico GP	Purpose
U13 DIN	GP27_A2	Data In
UA LOAD	GP22	Load All
UA CLOCK	GP21	Clock

SPST On/Off

Name	Pico GP
U15	GP11

Reference

For the MAX7129 pins use the logic level shifter in pins instead

Mobiflight configs are on Github.

3/24/2026 3 AM - CAD

Time spent: 3h

Lid

• 1mm OD circles for LEDs
• 16mm vert and horz spacing for buttons and LEDs
• Everything else done to PCB spec
• 5mm border

Button

• 2.6mm button press-fit
• 6*10mm Button

Case

• 4mm Bottom Spacing
• 9mm Top Spacing

PCB

• DRC final run
• Silkscreen final
• Copper pour final rebuild
• Sanity checked

Github Uploaded:

• Final PCB Gerber file ZIP
• Button STEP
• Lid STEP
• Case STEP
• PCB EasyEDA Pro STEP Export

3/22/2026 11 PM - CAD and Case

Time spent: 1.25h

Dimensions

155.67mm * 95.3mm (5mm wall)

• 7seg height: 9mm
• Pi Pico USB-C Clone w/ Headers: 4mm
• Female Headers: 4mm
• “Standoff” case height: 8.5mm
• Heat set insert OD: 5mm
• Heat set insert 3d print hole: 4.6mm
• All other components dimensions in their Datasheets

i.e. In this case, construction dual-point rect at 129.413x69.83mm and then a center-point-rect at its footprint

Sanity checked!

Case worked on

Check Hackatime

3/22/2026 7 AM - PCB

Time spent: 1h

PCB

• 2-layer design now
• 1mm power traces (yes, I don’t need this much but it’s fine)
• Made it 2-layer for cheaper JLCPCB costs

3/21/2026 1 AM - PCB

Time spent: 2.5h

PCB

• Copper Pour for GND
• GND nets on Pico
• Component Data Routing

BoM

• Stasis BoM populated with LCSC and Amazon parts
• JLCPCB will be added after quote

3/20/2026 3 AM - Parts Assignment

Time spent: 0.75h

Parts BOM

LCSC

• C = Capacitor
• R = Resistor
• L = LED
• B = Button
• IC = IC/Chip

Note: Any item’s quantity that’s unreasonably high (i.e. 100 capacitors) is due to the minimum purchase count in LCSC. However, these are so cheap that 100 vs 4 won’t really make a difference, as it is the matter of cents.

Part	LCSC P#	Qty	Cost (Per)	Total
0.1uF C0603	C1591	100	$0.0028	$0.28
10uF C0603	C96446	20	$0.0176	$0.35
6x6 B	C49234152	20	$0.0306	$0.58
6d7s L	C47471	3	$1.7325	$5.20
220 R	C22962	100	$0.0013	$0.13
22K R	C2907015	100	$0.001	$0.11
Rot Enc	C470754	3	$2.08	$6.23
Green L	C19273151	100	$0.006	$0.60
Log Lvl IC	C155176	2	$0.3292	$0.66
7seg CT IC	C6705351	4	$1.5703	$6.28
Multiplexer IC	C6525	2	$0.7064	$1.41
SPST	C1788492	2	$0.6153	$1.23
Header Pin F	C7499336	4	$0.24

Other Parts

• Looking at TI CD74HC4067PWR
• Switch to TI CD4067BM96, LCSC C6525
• • Do this in schematic/pcb.

Some part photos

3/20/2026 2 AM - PCB

Time spent: 2.5h

PCB

• MAX7129 routing completed
• 0.1uF and 10uF capacitors added in parallel from VBUS to GND next to the multiplexer
• Main power traces (0.7mm) done
• Main power vias (0.7mm OD 0.4mm ID) done
• Basic naming and silkscreening done

TO DO

• Wire Pi to other Components
• Sanity-check with others (schematic and PCB)
• Ground net, pour, or traces

Pictures

Power Traces (Inner1 Layer)

Bottom Layer

Top Layer

Render

Render without Parts

3/19/2026 4 PM - PCB

Time spent: 1.25h

PCB

• 1x MAX7219 routed to 6dig7seg
• Logic Level Shifter 1/2 outputs complete
• Multiplexer inputs complete
• Basic silkscreens
• Capacitor Placement
• Pi Placement

3/19/2026 6 AM - PCB and Schematic

Time spent: 6h

~6 hours over the course of the day

Completed:

Schematic

• Completed
• All ICs now SMD (no THT)
• Not fully sanity-checked
• 2x MAX7219s, 1x Multiplexer, 1x Logic Level Shifter, 2x 6-digit 7-segment displays, 13x buttons, 7x LEDs, 1x SPST switch, 2x rotary encoders

PCB

• Initial Layout
• Routing Required
• • Routing done for: Some small resistors and capacitors
• • Routing semi-done for: Buttons and Multiplexer; must move back-mounted resistors back onto the front
• • Rest must be started / done.
• 4-Layer
• EasyEDA Pro

3/18/2026 3 AM - PCB

Time spent: 4h

OVER THE COURSE OF THE SCHOOL DAY WHEN I HAVE TIME IN CLASS…

PCB

• Complete (not checked yet)
• 4 layer PCB

Schematic

• Complete (not checked yet)

3/17/2026 1 AM - Rotary Encoders and Switch

Time spent: 0.2333333333333333h

START 6:23 PM PDT END 6:37 PM PDT

Rotary Encoder

• ALPSALPINE EC11E15244B2
• https://www.lcsc.com/product-image/C470754.html
• Has push button, but is not used at the moment, but can be mapped.
• SW13 / Left
• • A - GP5 / P7 (A)
• • B - GP6 / P9 (B)
• • C - GND (Encoder GND)
• • D - GND (Button GND)
• • E - GP7 / P10 (Button)
• • 6 - GND
• • 7 - GND
• SW14 / Right
• • A - GP8 / P11 (A)
• • B - GP9 / P12 (B)
• • C - GND (Encoder GND)
• • D - GND (Button GND)
• • E - GP10 / P14 (Button)
• • 6 - GND
• • 7 - GND

Switch

• As mentioned before, SPST
• GP11 / P15

Images

3/17/2026 12 AM - SPST, Buttons Multiplexer

Time spent: 1h

START 4:50 PM PDT END 5:52 PM PDT

SPST Switch

• YUEN FUNG MT-0-102-A101-M200-RS
• https://www.lcsc.com/product-detail/C1788492.html
• SPST, 125V Max, 5A Max
• THT

Buttons

• Due to pin limit we are using a multiplexer.
• Multiplexer: TI CD74HC4067
• https://www.lcsc.com/product-detail/C1545936.html
• SW# Button - To L# on Multiplexer
• E# - Grounded
• S# on Multiplexer - GPIO # on Pico
• COMMON INPUT/OUTPUT Pin 1 on Multiplexer - GPIO 4 (6)

3/16/2026 11 PM - MAX7219 and Complete Schematic

Time spent: 0.9666666666666667h

START 3:25 PM PDT END 4:23 PM PDT

Schematic has been completed, however I am having someone else sanity-check it.

Logic Level Shifter

• A input, Y output
• 3.3V logic to 5V logic
• Pins Used:
• 1. VCC - to 5V VBAT
• 2. GND - to GND
• 3. #1OE - to GND to enable 1
• 4. #2OE - to GND to enable 2
• 5. #3OE - to GND to enable 3
• 6. 1A - to Pico GP21 (34) for CLOCK
• 7. 1Y - to Both 7219 “CLK” (13)
• 8. 2A - to Pico GP22 (32) for LOAD
• 9. 2Y - to Both 7219 “LOAD” (CS#) (12)
• 10. 3A - to Pico GP27_A2 (29) for DATA
• 11. 3Y - to U13 ONLY “DIN” (1)

MAX7219

• Takes 5V
• Takes the following inputs:
• Clock
• i. Shared, “metronome”
• Data
• i. Actual data, goes into U13 “DIN” only
• ii. Pico -> Logic Shift -> U13 DIN -> U13 DOUT -> U11 DIN
• Load
• i. Shared, command to refresh or “commit”

Photos

3/16/2026 10 PM - 7 Segment, MAX7219, and Logic Level Shifter

Time spent: 0.8h

START 2:15 PM PDT END 3:03 PM PDT

New Parts

• Logic Level Shifter - 3.3V to 5V - TI SN74AHCT125N - https://www.lcsc.com/product-detail/C354152.html
• 1. For MAX7219
• MAX7219 will pull VBUS 5V

3/16/2026 3 PM - Schematic and MobiFlight

Time spent: 0.75h

START 8:00 AM PDT END 8:50AM PDT

Parts

• 2x 6-digit 7-segment display - ZHIHAO FJ3661AH - https://www.lcsc.com/product-detail/C47471.html
• 13x 4-pin Button - hanxia HX-6x6x7.3-TP FT - https://www.lcsc.com/product-detail/C49234152.html
• 2x MAS7219 - https://www.lcsc.com/product-detail/C492111.html
• 7x Green 0603 LED - YONGYUTAI YLED0603G - https://www.lcsc.com/product-detail/C19273151.html - LEDs only for top two rows of buttons

3/16/2026 6 AM - Basic Brainstorming

Time spent: 1h

START 10:35PM PDT END 11:35PM

Stats / Info - A320 RMP

• Airbus A320 Radio Management Panel (Upper)
• https://docs.flybywiresim.com/pilots-corner/a32nx/a32nx-briefing/flight-deck/pedestal/rmp/
• 13 Buttons (12 Main + 1 A-B Switcher)
• 1. Mains: VHF1/2/3, HF1/2, AM, NAV, VOR, ILS, MLS, ADF, BFO
• ii. A-B Switch (Backlit)
• 1 SPST Switch
• 2 Rotary Encoders (Stacked)
• Two 6-digit 8-segment displays
• One “VHF 2/3 Selected” LED
• 12 LEDs Occompanying Main buttons

Ideas

• RP2040 USB-C Clone
• i.e. https://www.aliexpress.us/item/3256806763219822.htm

Photos