CRYPTOCURRENCIES
Hardware Crypto Wallet Development
Hardware Crypto Wallet is a digital wallet and payment platform that allows users to pay, store, send, and receive digital assets, such as cryptocurrencies, digital currencies and fiat currencies.
Embedded Linux Platform on Microchip SAMA5 application processor
Secure Hardware Architecture for isolated storage of cryptographic
Multi-Radio Connectivity: Wi-Fi, Bluetooth, NFC in compact multilayer PCB
High-Density PCB, 10-layer PCB, 700 components, 2500 pads, 2000 vias
Bank Card Size
Size of the plastic card is 85mm x 54mm, thickness 3.5mm
Battery powered
Low consumption, the wallet should works from 2 to 4 weeks
Wireless interfaces
Wi-Fi (2.4, 5GHz), Bluetooth 5.1, NFC ISO/IEC 14443
Touch Button, OLED display
Touch (capacitive) button and OLED display
Power Supply
Powered by any USB Type-C source with a power output of 5W
Secure MCUs
Storing keys in secure microcontrollers without access
Engineering at a Glance
Project Overview
The customer requested the development of an ultra-thin hardware crypto wallet capable of securely storing cryptocurrency and payment credentials in a form factor comparable to a standard bank card.
The device combines secure key storage, wireless connectivity, rechargeable battery power, and a Linux-based application processor in a 3.5 mm thick enclosure.
ATEH.tech was responsible for the complete hardware development, including electronics, PCB layout, embedded Linux, firmware, mechanical design, and prototype manufacturing.
Hardware Crypto Wallet is a digital wallet and payment platform that allows users to pay, store, send, and receive digital assets, such as cryptocurrencies, digital currencies and fiat currencies. It is a multi-functional platform that offers a wide range of financial services, including P2P transactions, mobile top-up, bill payment, and more. Wallet supports multiple cryptocurrencies, digital assets, fiat payment systems (Visa, Mastercard, etc) and it provides users with a secure and convenient way to manage their digital and fiat assets.
The device combines secure key storage, wireless connectivity, rechargeable battery power, and a Linux-based application processor in a 3.5 mm thick enclosure.
ATEH.tech was responsible for the complete hardware development, including electronics, PCB layout, embedded Linux, firmware, mechanical design, and prototype manufacturing.
Hardware Crypto Wallet is a digital wallet and payment platform that allows users to pay, store, send, and receive digital assets, such as cryptocurrencies, digital currencies and fiat currencies. It is a multi-functional platform that offers a wide range of financial services, including P2P transactions, mobile top-up, bill payment, and more. Wallet supports multiple cryptocurrencies, digital assets, fiat payment systems (Visa, Mastercard, etc) and it provides users with a secure and convenient way to manage their digital and fiat assets.
Engineering Challenges
✔ Ultra-thin Form Factor
Designing a complete embedded Linux platform within the dimensions of a standard bank card (85 × 54 mm) and the total thickness below 3.5 mm.
✔ Battery Life
Achieving 2–4 weeks of operation on a rechargeable battery through aggressive power optimization and low-power hardware architecture.
✔ Hardware Security
Protecting private keys using dedicated secure microcontrollers with isolated secure storage and no direct external memory access.
✔ Support for Multiple Payment Systems
Cryptocurrencies (bitcoin, ethereum, etc.) and fiat currencies (Mastercard, Visa, American Express, etc.).
✔ Multi-Protocol Connectivity
Integrating Wi-Fi (2.4, 5GHz), Bluetooth 5.1, NFC ISO/IEC 14443, USB 2.0, and multiple secure controllers into a compact multilayer PCB.
✔ Display and Button
Touch (capacitive) button and OLED display for wallet control
Key Parameters
Interfaces:
▪️ CPU – Microchip SAMA5
▪️ 1 x RAM – DDR2 128MB
▪️ 1 x Wi-Fi 2.4Ghz, Bluetooth
▪️ 2 x Crypto MCUs for crypto and fiat
▪️ 2 x NOR flash memory
▪️ 1 x USB 2.0
▪️ 1 x NFC ISO/IEC 14443
▪️ LCD, TRNG
▪️ Recharge Battery
▪️ Power supply 5V, 5W (USB type-C)
▪️ CPU – Microchip SAMA5
▪️ 1 x RAM – DDR2 128MB
▪️ 1 x Wi-Fi 2.4Ghz, Bluetooth
▪️ 2 x Crypto MCUs for crypto and fiat
▪️ 2 x NOR flash memory
▪️ 1 x USB 2.0
▪️ 1 x NFC ISO/IEC 14443
▪️ LCD, TRNG
▪️ Recharge Battery
▪️ Power supply 5V, 5W (USB type-C)
PCB:
▪️ Stackup – 10 layers
▪️ PCB – 700+ components
▪️ 2500+ pads
▪️ 2000+ vias
▪️ High-density multilayer PCB
▪️ Stackup – 10 layers
▪️ PCB – 700+ components
▪️ 2500+ pads
▪️ 2000+ vias
▪️ High-density multilayer PCB
Project Results
ATEH.tech delivered a complete hardware platform from concept to functional engineering prototypes, including:
✔ Hardware architecture
✔ Schematic design
✔ Mechanical enclosure design
✔ Prototype manufacturing
✔ Embedded Linux (Buildroot)
✔ Linux kernel porting
✔ Device Tree development
✔ Driver development
✔ Firmware for secure microcontrollers
✔ Manufacturing support
✔ Board bring-up
✔ Functional validation
✔ Production-ready engineering samples
✔ Hardware architecture
✔ Schematic design
✔ Mechanical enclosure design
✔ Prototype manufacturing
✔ Embedded Linux (Buildroot)
✔ Linux kernel porting
✔ Device Tree development
✔ Driver development
✔ Firmware for secure microcontrollers
✔ Manufacturing support
✔ Board bring-up
✔ Functional validation
✔ Production-ready engineering samples
LET'S WORK TOGETHER
Have a Project in Mind?
Tell us about your project. We'll help you turn it into a production-ready embedded system.
You'll communicate directly with the engineer leading your project.