# Mini-Blockchain Network with Raspberry Pi

> The Mini-Blockchain Network demonstrates an energy-efficient blockchain solution based on seven interconnected Raspberry Pi computers. Stored information is automatically synchronized between all devices, making data manipulation more difficult and increasing security through decentralized storage. The system shows how cost-effective hardware can be used for blockchain applications and offers a practical alternative to energy-intensive traditional blockchain networks.

**Sector:** Tertiary sector · **Industry:** Information technology · **Organisation:** Blockchain Reallabor · **Maturity level:** Pilot

Canonical URL: https://www.sapientblock.com/en/use-cases/blockchain-reallabor-blockchain-netzwerk-live-erleben

## Documentation status

- **Project status:** Pilot
- **Evidence:** Evidence medium
- **Editorial review:** Ufuk Avci, 15 April 2026

## Description

The Mini-Blockchain Network Demonstrator at the Blockchain Reallabor Hürth (Fraunhofer FIT) is a unique learning demonstrator: several physical computers/nodes are visibly connected by cables, forming a scaled-down but fully functional blockchain network.

The fundamental problem with blockchain explanations: abstract concepts such as distributed ledger, consensus, and immutable chains are difficult to convey. Visual explanations help, but nothing convinces as much as direct experience. The Mini-Blockchain Network Demonstrator makes this possible: visitors can enter a transaction themselves; they see how it propagates through all nodes; they can try live to alter a past transaction — and observe how the network rejects the manipulation. The Blockchain Reallabor uses this demonstrator for tours, workshops, and company visits. The system is completely live: no simulation, no pre-recording — real blockchain transactions in real time. The demonstrator also serves as a didactic tool for technical companies wishing to teach blockchain basics to non-technical staff. The Blockchain Reallabor portfolio lists the Mini-Blockchain Network as one of the core demonstrators in the euronova CAMPUS Studio 6.

## Benefits

- Companies can test and evaluate blockchain technology with minimal investment costs before launching larger projects.
- Significant cost reduction by using inexpensive Raspberry Pi hardware instead of costly specialised blockchain servers.
- Significantly lower energy consumption compared to traditional mining-based blockchain networks.
- Practical demonstration of the feasibility of decentralized data storage without high technical barriers.
- IT professionals receive an accessible platform for practical further training in blockchain technologies without steep learning curves.

## Challenges

- Companies must ensure that the limited performance of the hardware is sufficient for their specific use cases.
- The limited computing power of the Raspberry Pi hardware restricts the scalability and transaction speed of the network.
- Acceptance and understanding of the technology within organisations can pose challenges during implementation.
- Staff require training to effectively use and maintain the new technology.

## Technology foundation

The system uses a permissioned blockchain technology specifically optimised for operation on resource-constrained hardware such as Raspberry Pi computers. This blockchain variant enables the operation of a secure decentralised network with low energy consumption, as only authorised participants can conduct transactions and no energy-intensive mining processes are required.

## Sources

- [Mini-Blockchain Netzwerk - Blockchain Reallabor](https://blockchain-reallabor.de/portfolio-item/mini-blockchain-netzwerk/)