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# ESBtnBox
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Simple button box for simracing and other activities.
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Simple button box for simracing and other activities. This works but its still
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an early phase and I hope to subject it to a great list of improvements from
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polishing the 3D models to making the whole thing more compact.
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This follows the simple principle of the keyboard matrix. Will update soon xoxo.
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# Components
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## Electronics
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| Part | Quantity |
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| ----------------------------------------- | -------- |
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| Arduino Pro Micro (ATmega32u4) | 1 |
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| Female Headers for pro micro | 24 |
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| JST-PH Connectors (6 pin) male and female | 1 | [^1]
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| JST-PH Connectors (5 pin) male and female | 1 |
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| JST-PH Connectors (3 pin) male and female | 1 |
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| JST-PH Connectors (2 pin) male and female | 3 |
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| Perf boards 70mm x 500mm | 2 |
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| 100nF Capacitors | 10 |
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| 74HC595N Shift Register | 1 |
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| 74HC165N Shift Register | 1 |
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| 10k Ohm Resistors | 20 |
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| 1N4148 diodes | 26 |
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| Toggle Switches | 6 | [^2]
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| Rotary Encoders | 4 |
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| 2P LW26-25 series changeover switch | 1 |
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| MX switches (and keycaps I recon) | 12 |
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| Wiring and consumables | Lots |
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[^1]: I used 2mm pitch for these connectors, but they didn't really match the
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pitch of the perf board I was using. Choosing other pitches wouldn't be a bad
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idea.
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[^2]: I used 4 On-Off-On switches and 2 MOM-Off-MOM switches. Permutate it
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however you desire.
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## Hardware
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| Part | Quantity |
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| --------------- | -------- |
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| M3 nuts | 20 | [^3]
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| M5 nuts | 2 |
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| M3x40mm | 4 | [^4]
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| M3x12mm | 2 |
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| M3x50mm | 4 |
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| M5x20mm | 2 |
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| M3 t-nut | 2 |
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| M2 Heat Inserts | 7 |
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| M2x6mm | 7 |
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[^3]: 4 of these are optional: the ones on the outwards facing piece that connects
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to the playseat and the 2 top ones on the front plate
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[^4]: 2 of these are optional: the ones on the outwards facing piece that connects
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to the playseat structure.
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## 3D printed parts
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- Clamp: composed by the files `./3DModel/seatAttachement_screwSide.FCStd` and
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`./3DModel/seatAttachement.FCStd`, the latter is the the one facing the seating
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user and the first the one facing outwards
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- Arm which is the file `./3DModel/arm.FCStd`
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- T-slot which bolts to the front plate: `./3DModel/tSlot.FCStd`
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- T-slot bracket which bolts to the t-slot and the arm: `./3DModel/tSlotAttachement.FCStd`
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- Front plate where all the buttons are mounted to: `./3DModel/frontPlate.FCStd`
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- Cover plate which where the "pcb" mounts and connects to the front plate: `./3DModel/pcbHolder.FCStd`
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# Assembly
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The assembly is straightforward, specially if you are the one that imagined it:
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1. put the toggle switches into their through holes and bolt them
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2. put the rotary encoders into their through holes and bolt them
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3. insert the MX switches into their holes
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4. bolt the changeover switch into its slot
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5. wire the things according to the schematic. I started by doing the columns
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and then the rows and left the rotary part of the encoders for the end. Crimp
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the JSH-PH connectors on the rows, columns and rotary encoders
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6. solder the components to the perf boards. I joined the 2 perf boards like the
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images show
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7. mount the back cover
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1. put the heat inserts into the back cover
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2. bolt the perf boards to the back cover
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3. drill holes on the front plate for the back cover holes. They go 7.5mm
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in from the front plate edges, 1.5mm below the toggle switches and are spaced
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apart by 45mm
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4. pass the M3x50mm bolts trough the front plate and put nuts holding them
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5. place nuts 8mm down from the tip on them
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6. connect the front plate electronics to the pcb
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7. place the back cover on the M3x50mm bolts and put nuts on it
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8. bolt the t-slot 3D printed part tot he front plate and pass the t-nuts into it
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9. place the t-slot attachement on the t-nuts. Leave them loose for later adjustments
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10. heat insert the M5 nuts into the arm and the M3 nuts on inside part of the clamp
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11. loosely assemble the arm
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12. place the assembly on the playseat and clamp it down with the M3x40mm bolts
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13. do the final adjustments and tighten everything down
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## Schematics
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Well, I'm not very well versed on KiCAD or eletronics design in general, so all
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I have is the following hand drawings and pinouts. I will make something better
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at some point.
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### Shift registers:
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| Pro Micro Pin | 74HC595N Pin |
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| ------------- | ------------ |
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| 4 | 14 |
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| 5 | 12 |
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| 6 | 11 |
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| GND | 8 |
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| GND | 13 |
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| 5V | 16 |
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| 5V | 10 |
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Put a capacitor on the 5V and common Ground
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| Pro Micro Pin | 74HC165N Pin |
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| ------------- | ------------ |
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| 7 | 15 |
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| 8 | 7 |
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| 9 | 2 |
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| 10 | 1 |
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| GND | 8 |
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| GND | 13 |
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| 5V | 16 |
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Put a capacitor on the 5V and common Ground
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#### Shift registers to kbd matrix
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Rows on the 595N:
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| 74HC595N Pin | Matrix Row |
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| ------------ | ---------- |
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| 1 | 5 |
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| 2 | 4 |
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| 3 | 3 |
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| 4 | 2 |
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| 5 | 1 |
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| 6 | 0 |
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Columns on the 165N:
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| 74HC165N Pin | Matrix Col |
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| ------------ | ---------- |
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| 14 | 4 |
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| 3 | 3 |
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| 4 | 2 |
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| 5 | 1 |
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| 6 | 0 |
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### Rotary Encoders
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Referring to the rotary encoders from the front view.
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Only the first one will have the common ground specified because thats the one
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that runs the ground for all the others.
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1st:
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| Pro Micro Pin | Rotary Encoder Pin |
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| ------------- | ------------------ |
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| 14 | Top |
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| GND | Middle |
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| 16 | Bottom |
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2nd:
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| Pro Micro Pin | Rotary Encoder Pin |
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| ------------- | ------------------ |
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| 15 | Top |
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| 18 | Bottom |
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3rd:
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| Pro Micro Pin | Rotary Encoder Pin |
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| ------------- | ------------------ |
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| 19 | Top |
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| 20 | Bottom |
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4th:
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| Pro Micro Pin | Rotary Encoder Pin |
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| ------------- | ------------------ |
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| 3 | Top |
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| 2 | Bottom |
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### Visual Aid
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Matrix Wiring:
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2 Pin JST-PH connectors from the rotary encoder:
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3 Pin JST-PH connectors from the rotary encoder:
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## Assembled project
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Before Width: | Height: | Size: 33 KiB After Width: | Height: | Size: 33 KiB |
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After Width: | Height: | Size: 799 KiB |
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After Width: | Height: | Size: 133 KiB |
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Before Width: | Height: | Size: 14 KiB After Width: | Height: | Size: 14 KiB |
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After Width: | Height: | Size: 3.2 MiB |
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After Width: | Height: | Size: 1.0 MiB |
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After Width: | Height: | Size: 4.2 MiB |
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After Width: | Height: | Size: 2.9 MiB |
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After Width: | Height: | Size: 605 KiB |
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After Width: | Height: | Size: 2.2 MiB |
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After Width: | Height: | Size: 2.3 MiB |
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After Width: | Height: | Size: 3.2 MiB |