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Author Topic: DIY BTC Signing device {SeedSigner}  (Read 98 times)
julerz12 (OP)
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October 31, 2026, 06:07:14 PM
 #1

Nakita ko 'tong lumang thread ni dkbit98 about SeedSigner and decided to build one.

Pero bago 'yan, ano nga ba itong SeedSigner?
Open-source Bitcoin signing device ito na binuo gamit ang Raspberry Pi Zero - puwede itong gamitin sa multi-signature setup, of course pati na rin sa single-signature setups.
Hindi ito hardware wallet. Ang hardware wallet kasi, naka-store ang mismong private key ng wallet mo sa loob nito on a secure element chip, ang SeedSinger, walang naka-store na private key dito.

Kung walang private key, paano ito nakakapag-sign ng transaction?

First, kinakailangan na mayroon kang Coordinator app (isang watch-only wallet software) na either installed sa PC or smartphone. This could be Electrum, Sparrow, Spectre, Bluewallet, etc. - As long as kaya mag-import ng QR code and broadcast it, pupwede siguro.

Then, you just build the transaction sa Coordinator app mo, and sign it using SeedSigner.
NOTE: Every time na gagamitin mo itong SeedSigner, you need to input your seed phrase  Grin - yep, I know - hassle, right? Why? - See below (Amnesia).
Kaya naman, marami sa mga gumamit nito, uses SeedQR - QR code ng seed phrase mo, SeedSigner can guide you on how to make one. So, instead of typing all 12/24 seed phrase sa device, scan mo na 'lang yung QR Code. Easy di ba?
May guide din sa kanilang GitHub repo on how to build your SeedQR

Once the transaction is signed, scan mo 'lang ulit ang signed QR code gamit ang Coordinator app mo to finally broadcast it.

Again, ganito ang magiging workflow: Coordinator app (builds transaction - unsigned QR Code) -> SeedSigner (scans, signs the transaction and gives signed QR Code) -> Coordinator app (scans the signed QR Code and broadcasts the transaction).

May Amnesia.
Sa ganitong setup (using SeedSinger), the device will only use its RAM - the moment na na-unplug mo ito, lahat ng memory nito during that session is automatically wiped out.
Meaning, kahit pa nawala itong device at napulot ng iba, wala silang kahit anong info na makukuha dito 'cause it would only be a blank SeedSigner.  Tongue

Another good thing about it is you can generate your own Seed Phrase - unlike most hardware wallets.
Maraming paraan para makapag-generate ka ng truly random seed phrase: Dice rolls method, using BIP39 wordlist, etc. (google mo na 'lang)

I think kaya rin mag-generate ng seed phrase and SeedSinger using its camera - haven't confirmed this yet.

Also, it supports a Passphrase (25th word) - you also need to manually input this every time gagamitin mo ang device.

Anu-ano ang parts na kinakailangan para mabuo ito? (See images below)
* Raspberry Pi Zero
Maganda if version 1.3 (yung walang wifi/bluetooth) pero pupwede din naman yung ibang newer versions ('wag 'lang yung luma)
Mas ok din if pre-installed na 'yung GPIO pins - dito mo kasi ikakabit ang LCD, pero kung magaling ka mag-solder, pwede na din kahit hindi pre-installed

* Micro SD card
4gb or more - dito mo i-install ang SeedSigner para magamit ng device
* Waveshare 1.3-inch LCD HAT
make sure na 240x240 pixels - may buttons na rin ito which you'll use to operate your device
* 5MP OV5647 Camera Module
make sure na it's for Raspberry Pi Zero at 'yung may gold-colored cable.
* micro-USB cable

Optional parts: 3D-printed case, spacers/screws - if gagamit ka ng case

Saan ba bibili ng mga parts na 'to?
Well - for now, Shopee, Lazada? IDK if sa mga big malls in the cities may mga nagbebenta nito. Most probably sa mga electronic stores - meron.
For me, right now, lahat ng inorder ko, shipped lahat from China. Cheesy Except sa SD card/cable - it's fine though, madali 'lang naman mai-check ang integrity ng hardware and since these parts are widely used sa kahit anong DIY projects, no one would suspect you're building it for a signing device.  Roll Eyes

As for the 3D-printed case, since wala akong 3D Printer, I'm currently asking some local 3d printing services if magkano ang gastos magpa-print ng case, btw, the files are available to download online for free if ever gusto nyo kayo mismo mag-print. Sana all may 3D printer

Risk
Since nakasalalay sa Seed Phrase mo ang pag-move ng funds, you need to guard and secure it. If you use SeedQR - same thing, secure it 'cause if someone gets access to it, kaya nilang mailipat ang funds mo.
Solution? Add a passphrase or, better yet, use a multi-signature wallet setup.

Images:
Raspberry Pi Zero

Camera Module

Waveshare 1.3-inch LCD HAT


NOTE: Hindi pa actually nabuo yung device since all the parts are still being shipped.  Grin -  will update this thread once buo na yung SeedSigner device ko.

So far, ang current total, including shipping fee, ay nasa 2,565 PHP (Raspberry Pi Zero, Waveshare 1.3-inch LCD HAT at OV5647 Camera Module). The other parts, mayroon na akong nakatambay dito. Grin
Case? Wala. Well, I will probably order one if magkasundo kami sa price doon sa 3D printing service na napagtanungan ko.

NOTE: Wala akong mahanap na Raspberry Pi Zero 1.3 sa Shopee, so I opted for the WH version (may wifi/bluetooth) - it's fine though. Yung SeedSigner may auto-disable siya sa mga features na 'yan when it's running, so the device remains air-gapped. Kung matapang ka naman, you can physically remove those - tutorial.

Website: https://seedsigner.com/
May parts list din sila sa website mismo
GitHub: https://github.com/SeedSigner
Full tutorial on how to build it, nandito na mismo sa GitHub repo nila

So, sa tingin 'nyo at that current total price, worth it ba?  Cheesy Would you buy and build one if the parts are readily accessible? Also, may alam o kakilala ba kayong seller ng mga parts na 'to locally? Or may 3d printer? Nagtanong ako sa Telegram group about this - walang sumagot  Cheesy

Kidmat
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October 31, 2026, 11:51:57 PM
Merited by julerz12 (1)
 #2

Meron Raspberry Pi 1.3 dito sa Lazada sir https://s.lazada.com.ph/s.ZPhfcl

Medyo may kamahalan to para DIY project pero yung experience kasi ang binabayadan.  Smiley
fullfitlarry
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November 01, 2026, 02:07:05 AM
 #3

Yes, I will do if available ang mga yan at mabibili natin sa Pilipinas. Then aral aral na lang kung paano i setup.

Alam naman natin na mahirap na magtiwala sa mga hardware wallets ngayon kaya dapat DIY na tayo kung paano ma protektahan ang ating Bitcoin at hindi mawala ng ganun ganun na lang.

At kailangan talaga nating maging technical person.

crwth
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November 01, 2026, 03:34:17 AM
 #4

Parang interested din ako gumawa nito. Sa tingin ko it's a good project at pagkaabalahan. Iniisip ko din bumili nyan. Yung 3D printer ko hindi na calibrated at balak ko din bumili ng bago.

May STL file ba for the cover and design na pwedeng iedit para mas customized?

Nabasa ko yung message mo sa Telegram kaso d na ako nakareply kasi feeling ko parang late na. Haha.

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fighter2627
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November 01, 2026, 10:40:40 AM
 #5

Iba ka talaga bossing, bagama't hindi ko pa ganun naaabsorb itong binabahagi mo dito ay naniniwala akong maganda itong pag-aralan, bigyan ko ng panahon na alamin talaga ito sa mga darating na araw medyo madami pa akong ginagawa itong mga araw na darating.

Kung babasahin ko ito sa ngayon ay parang may pagkateknikal din siya, at parang may DIY din kung titignan ko sya literally, tapos kailangan ko rin pag-ipunan dahil sa part ko ngayon ay may pagkapricey sya na maaring sa iba ay mura na ito alamin ko talaga ito sa ngayon para makuha ko yung ganda ng binahagi na ito ni Bossing.


julerz12 (OP)
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November 01, 2026, 11:48:44 AM
Merited by crwth (1)
 #6

Meron Raspberry Pi 1.3 dito sa Lazada sir https://s.lazada.com.ph/s.ZPhfcl

Medyo may kamahalan to para DIY project pero yung experience kasi ang binabayadan.  Smiley
Thanks for sharing. Goods na rin to since may options to buy the board with additional kits. May combo kit na rin sila that comes with a Micro SD Card and camera module.

Parang interested din ako gumawa nito. Sa tingin ko it's a good project at pagkaabalahan. Iniisip ko din bumili nyan. Yung 3D printer ko hindi na calibrated at balak ko din bumili ng bago.

May STL file ba for the cover and design na pwedeng iedit para mas customized?
Meron naman. Dalawang case ang pagpipilian: yung may faceplate at buttons (Orange Pill), at yung open 'lang (Open Pill).
Open Pill files: https://github.com/SeedSigner/seedsigner/tree/main/enclosures/open_pill

Orange Pill files: https://github.com/SeedSigner/seedsigner/tree/main/enclosures/orange_pill


Prefer ko 'tong orange pill; mas sleek ang design - parang old gaming console 'lang.

fighter2627
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Today at 04:37:03 AM
Last edit: Today at 04:52:02 AM by fighter2627
Merited by julerz12 (1)
 #7

Sa mga nais pa na mas makita kung pano ito inaaassemble ay sa tingin ko makakatulong ang full demo tutorial na ito kung pano binubuo na kagaya ng binabahagi ni
bossing @julerz12 dito sa SeedSigner na ito.

Panuorin ang full demo tutorial ng video na ito:

https://www.youtube.com/watch?v=mGmNKYOXtxY

Halos kumpleto at malinaw ang demo nito sa mga nais na gumamit ng seedsigner na ito maging yung pagset sa settings ay mapapanuod din natin.
Sana makatulong din since ito naman talaga ang aim ng bawat isa dito sa ating lokal section.

crwth
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Today at 09:21:41 AM
 #8

~snip
Meron naman. Dalawang case ang pagpipilian: yung may faceplate at buttons (Orange Pill), at yung open 'lang (Open Pill).
Open Pill files: https://github.com/SeedSigner/seedsigner/tree/main/enclosures/open_pill

Orange Pill files: https://github.com/SeedSigner/seedsigner/tree/main/enclosures/orange_pill


Prefer ko 'tong orange pill; mas sleek ang design - parang old gaming console 'lang.
Ganda din pala. Ang kakailanganin mo lang dito ay yung orange filament. Pwede nga ibahin kung wala yan dahil pwede naman mag print and assemble na lang siguro. Parang maganda magbenta nito kung sakali  Tongue Pero hindi pa ayos yung 3D printer ko. Soon siguro.

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julerz12 (OP)
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Today at 10:06:26 AM
 #9

Sa mga nais pa na mas makita kung pano ito inaaassemble ay sa tingin ko makakatulong ang full demo tutorial na ito kung pano binubuo na kagaya ng binabahagi ni
bossing @julerz12 dito sa SeedSigner na ito.

Panuorin ang full demo tutorial ng video na ito:

https://www.youtube.com/watch?v=mGmNKYOXtxY

Halos kumpleto at malinaw ang demo nito sa mga nais na gumamit ng seedsigner na ito maging yung pagset sa settings ay mapapanuod din natin.
Sana makatulong din since ito naman talaga ang aim ng bawat isa dito sa ating lokal section.
Thanks for sharing.
Yes, maraming video tutorials about assembling this device sa Youtube since marami din naman ang gumagamit nito as a cheap alternative signing device. Plus the fact that it can also be paired with other hardware wallets para makapag-setup ng multi-signature wallet, makes it a more popular choice amongst those who like to DIY.  Wink

Ganda din pala. Ang kakailanganin mo lang dito ay yung orange filament. Pwede nga ibahin kung wala yan dahil pwede naman mag print and assemble na lang siguro. Parang maganda magbenta nito kung sakali  Tongue Pero hindi pa ayos yung 3D printer ko. Soon siguro.
Yan nga din ang suggestion ko doon sa napagtanungan ko na may 3D printing service sa Shopee, pero parang takot silang ilagay mismo yung designs sa product lists nila, baka daw ma-report. Not sure what's the problem about that kasi if tutuusin, open source naman yung designs di ba? BTW, doon sa na-orderan ko ng 3D-printed case, nasa 390 PHP ang price niya (buti wala nang shipping fee sa Shopee upon checkout). Orange filament, PLA. Since wala akong alam sa 3D printing, go na 'lang.  Cheesy Sa tingin mo, sakto 'lang ba yung presyo?

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