Servo reciever board

Physical Assembly

Index

PCB Assembly/Soldering guide

Esp32-C6

DFR0952 Boost Module

4.6k Ohm Resistor

IRLZ34N Logic Level MOSFET

JST Connectors

SPDT Slide Switch

Final

Bonus - Pin Snip Montage

Crimping

Installing Assembled PCB in 3D printed Case

PCB Assembly/Soldering guide

Soldering the components onto the pcb is pretty simple by design. I used exclusively THT components as to make it as accessible as possible to anyone who wanted to construct a working set of ears.

That being said, if this is your first time with soldering, or you want to sanity check your progress, feel free to look below;

Steps by Component(s)

Esp32-C6

Strangest/trickiest part first, soldering the esp32 onto the board, when some of the pads aren't designed to be THT

Stealing the idea from some pi portable projects, the pcb has a place to line up and then solder pads directly, as if they were THT components, minus needing the pins

https://github.com/user-attachments/assets/6ff89706-0427-4854-b957-33d2748519fc

1. Line up the esp32 pin holes with the PCB. Use the battery pads as a guide, and match them with the battery holes on the pcb.

If you can see clearly through the pin holes on the pcb, that should be a good rule of thumb for having the solder make a proper connection

https://github.com/user-attachments/assets/05a7b818-2d18-4018-bafd-15a15622c9a0

2. secure the esp32 to the board in some way so it doesn't move whilst soldering (I recommend capton tape)

https://github.com/user-attachments/assets/03d54e9b-8dcf-416b-b4e0-458c89ab1afb

3. Following that, solder the esp32 pads to the pcb by letting solder coat through the hole onto the pad. This will help keep the esp32 in place.

https://github.com/user-attachments/assets/d8faf033-5a61-4b14-b7ea-404d335dd54e

3.5) Bonus step, at this point if you want to use a multimeter to make sure the ground pin on the ESP32-C6 is matching the pcb pad, now's a good time to do so

Topdown Solder view:

https://github.com/user-attachments/assets/c2cd6672-b03a-478b-8b81-bdf5427299b8

Close up on Solder view:

https://github.com/user-attachments/assets/e28facec-703d-47a0-a3c1-61f9552d93e6

4. Repeat this process for each pin hole on the esp32 on the board. If the solder flows straight through you can reasonably assume you've got a good connection

If in doubt for the esp32 pins, you can always use a multimeter to check continuity

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DFR0952 Boost Module

https://github.com/user-attachments/assets/20d25132-c803-4f49-b0af-fe24123dfbe5

There are 2 ways to solder the Boost Module to the board. Either 1, Soldering pins to the boost module, and then soldering that to the pcb. Or 2, Similar to the method above lining up the holes with the pads on the pcb and melting solder through both pcbs

I prefer 2, as it keeps everything flush with the board

Soldering Pins to the module and the pcb

1. Solder pins to the Module first

2. Solder those pins through to the pcb

Soldering straight to the pcb

1. Line up the Boost module pins with the pcb, as before if you can see clearly through the pin holes on the pcb, that should be a good rule of thumb for having the solder make a proper connection

https://github.com/user-attachments/assets/08f4d33c-642c-415e-a15c-a5704ee6e2ea

2. Secure the boost module to the board (I once again recommend capton tape)

https://github.com/user-attachments/assets/1d07b14f-766c-47ba-81a9-1c2fe7a4f486

3. Solder through the bottom of the board through to the pin

https://github.com/user-attachments/assets/4063684e-56e4-4524-bf9f-1d977909b193

4. Turn the board over and reflow the solder on the top of the module to the board below it

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4.6k Ohm Resistor

https://github.com/user-attachments/assets/2640912d-a5d6-4e48-8f24-30c52ad5f29a

https://github.com/user-attachments/assets/9ac71b3d-dca0-4e95-a607-c60646f1eb5f

This is just a basic THT Soldering process

Poke through the hole, bend the pins against the pcb solder it in

IRLZ34N Logic Level MOSFET

https://github.com/user-attachments/assets/1a070582-4408-457d-8ebb-37c1ecead1be

Same as for the other Misc THT Components,

https://github.com/user-attachments/assets/df840dbd-ea59-47ca-b1ab-33e0bf02b99a

Lay the Mosfet flat against the PCB, bend the pins back, secure the mosfet body itself in place if needed (Capton tapes a good choice (not sponsered, just a fan)), Solder

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JST Connectors

https://github.com/user-attachments/assets/b6d3261b-38b1-4b1d-b681-efd01017a623

Same as the other components mentioned before

Slot them in on the components side of the board, secure in place (Capton Tape: The GOATed Choice), solder in

https://github.com/user-attachments/assets/cc4804e8-4b09-44fc-ad21-e733dcd569e4

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SPDT Slide Switch

https://github.com/user-attachments/assets/bfb085b4-0174-4165-b58a-63deaa4b51ec

Similar to the other components, but differs in which specific micro slide switch you're using

the ones I used are crap ones from Amazon, and they need to be folded over like such before soldering in

https://github.com/user-attachments/assets/3c21431f-e782-4019-95dd-feee480f735e

Depending on how flimsy the switch feels in that, you can then hot glue it down if neccessary, and then solder in place

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Final

https://github.com/user-attachments/assets/8b770aa5-c993-4b1f-8861-bc5e2a48de30

After everythings soldered and assembled, the final product should look something like the following

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Bonus - Pin Snip Montage

https://github.com/user-attachments/assets/3897d042-93ec-40b2-8cee-4692d19c5c93

Crimping

Servos need a specific configuration in order to work, From left to right, 5V, GND, Signal

1. Start with the standard dupont connector

2. Cut ends off of servos

3. Crimp 'em

4. Put in right slots

5. ???

6. Profit.

Installing Assembled PCB in 3D printed Case

https://github.com/user-attachments/assets/94fb8a15-f5aa-41da-9fcb-0e23103d66a9

1. Print the 3D case in TPU

https://github.com/user-attachments/assets/12c65012-48b3-47f3-8964-cc56bbcdafd9

2. Press the pcb down into the spacer as seen in the above clip, and move it into the enclosure

https://github.com/user-attachments/assets/45481696-18ee-453b-8a8f-0636671e7eb6

3. Use a pair of Pliers - or honestly the first time I just used my finger nail - to reposition the swithc and make sure the switch is seated correctly

https://github.com/user-attachments/assets/a0defc09-b446-4916-8d48-d20024c9364a

4. Align the USB-C hole

https://github.com/user-attachments/assets/1194d335-ad8c-4d83-bdac-c74246ebf11d

5. You should be good to go

Setting up the Servos for Attachment

After 3d printing everything, you'll need to attach the servos, in a way that should be fairly self explanatory.

You'll need to first install a hobby servos into the Flexible Servo holder

and then install a second servo into the Servo Attacher,

Before attaching the second servo into the first servo.

Then, you can attach the Ear print out to the Second Servo

To demonstrate this, here are some lazy diagrams

Attaching Ear to Headphones

Once everythings ready for attaching to your headphones/headband, you can begin actually doing that

https://github.com/user-attachments/assets/96e62584-7f58-4617-b01d-8973c007e98b

1. Attach the pcb holder to one side of your headphones, and then secure it using the button strap. It should function similar to buttoning up anything else, don't be afraid to stretch the button strap in order to get it to connect. It's TPU and the design kinda relys on it being flexible

https://github.com/user-attachments/assets/0991a19b-679e-4a93-93d0-c458842c3f06

2. Insert the battery into the PCB Holder, and plug it in

Note: You can do this prior to attaching it to your headphones, I just didn't

https://github.com/user-attachments/assets/d4e155b1-ebcd-4a0a-8a05-d827ba0f0d81

3. Insert your servos into the pcb holder. The middle connector is for vertical movement (the servo attached to the ear), the connector on the side is for horizontal movement (the servo attached to headphones)

Note: You can do this after to attaching it to your headphones, I just didn't

https://github.com/user-attachments/assets/69542e6d-8169-4057-b700-15f20d7e9b32

4. Finally, attach the Servo holder to the headphones using the same button strap method that was used for the pcb holder.

5. Repeat on the other side

6. Congratulations, your remote control ears are mounted and ready to use