Product Overview

The Nerdminer S19 is a microcontroller-based SHA-256 Bitcoin lottery miner with an estimated hashrate of approximately 156 KH/s (kilo-hashes per second). Part of the NerdMiner V2 family of DIY Bitcoin miners, the S19 variant uses an ESP32 microcontroller to perform real SHA-256 proof-of-work — not ASIC chips. While the hashrate is far below commercial miners, it provides the pure lottery-mining experience for Bitcoin enthusiasts who want to participate in solo Bitcoin mining with the most affordable hardware available.

The “S19” aesthetic name in this Nerdminer variant refers to the case design, which is styled to resemble a Bitmain Antminer S19 in miniature form. Inside is an ESP32-S3 or similar microcontroller running open-source NerdMiner firmware (available on GitHub), which connects to a solo mining pool via Wi-Fi and submits SHA-256 work. Every hash submitted is genuine Bitcoin proof-of-work, though at 156 KH/s the statistical probability of solving a block is extremely remote.

For South African Bitcoin enthusiasts, the Nerdminer S19 offers a fun and meaningful entry into the Bitcoin mining world at essentially zero operating cost and zero electrical infrastructure requirements. It runs from a standard USB-C port, draws under 1W, and represents the ultimate in load-shedding resilience — any phone charger or power bank can keep it running indefinitely through even the most severe South African load-shedding stages.

Key Features

• ~156 KH/s SHA-256 Hashrate: Real Bitcoin SHA-256 proof-of-work from an ESP32 microcontroller. Each hash submitted is genuine — the Nerdminer S19 contributes real work to the Bitcoin network, however modest the rate.
• Solo Mining Experience: Configured out of the box for solo pool mining — every submitted share is a lottery ticket for the full Bitcoin block reward. The statistical probability is extremely low but real.
• Under 1W Power Consumption: One of the lowest power draws of any Bitcoin mining device. Runs from a standard USB-C phone charger or power bank — no dedicated circuit, no electrical planning, no infrastructure at all.
• S19-Style Miniature Case: The Nerdminer S19 comes in a case designed to resemble the iconic Bitmain Antminer S19 at 1/100th the scale — a fun collectible for Bitcoin enthusiasts and mining hobbyists.
• Wi-Fi Connected: Connects to your home Wi-Fi network and pools to your configured solo mining pool (typically CK Solo Pool or similar). Web interface accessible from any browser on the same network.
• Open-Source Firmware: Runs the open-source NerdMiner V2 firmware. Update, customize, or contribute to the firmware community. Full transparency into what the device does.
• Collectible and Gift-Worthy: A unique, fun conversation piece for Bitcoin supporters. The miniature S19 design and real Bitcoin mining functionality make it an excellent gift for Bitcoin enthusiasts.

Technical Specifications

• Algorithm: SHA-256
• Hashrate: ~156 KH/s
• Processor: ESP32 microcontroller (not an ASIC chip)
• Power Consumption: <1W
• Input Power: USB-C (5V)
• Connectivity: Wi-Fi (2.4 GHz)
• Display: Small OLED display showing hashrate and status
• Firmware: NerdMiner V2 (open-source)
• Case Design: Miniature S19-style enclosure
• Mining Type: Solo lottery mining

Power & Installation Notes

The Nerdminer S19 draws under 1W from USB-C 5V input. No electrical planning is required. Plug into any USB-C phone charger, laptop USB port, or power bank. South Africa’s standard 230V / 50Hz mains power is completely irrelevant — any USB-C adapter handles the voltage conversion automatically.

No registered electrician, no dedicated circuit, no electrical modifications — just a USB-C cable and any phone charger you already own. The Nerdminer S19 is the simplest Bitcoin mining setup possible from an electrical standpoint.

Load shedding is a complete non-issue. At under 1W, even the smallest phone power bank (5,000 mAh = ~18.5 Wh) can power the Nerdminer S19 for well over 18 hours. A standard 20,000 mAh power bank would provide over 72 hours of continuous runtime. This is the most load-shedding-proof Bitcoin mining device available.

Electricity Cost Context — South Africa

At Eskom’s approximate residential reference tariff of R2.80/kWh, the monthly electricity cost for the Nerdminer S19 is estimated as follows:

(0.8 ÷ 1,000) × 24 × 30 × 2.80 = approximately R1.61 per month

This is an operating cost estimate only. At approximately R1.60/month in electricity, the Nerdminer S19 has the lowest electricity operating cost of any Bitcoin mining device. The economics of pool mining at 156 KH/s are negligible, but for the pure solo mining lottery experience and the joy of running real Bitcoin proof-of-work on your desk, the R1.60/month electricity cost is essentially free.

Ideal Use Cases

• Bitcoin solo mining lottery: Point it at CK Solo Pool and let it run indefinitely. Every block candidate hash is a legitimate lottery ticket for the full Bitcoin block reward — the odds are astronomically long but real.
• Bitcoin education and gift: A fun, affordable, educational gift for anyone interested in Bitcoin. The miniature S19 design and real mining functionality make it a unique conversation piece and learning tool.
• Always-on Bitcoin presence: For Bitcoin maximalists who want a device on their desk or shelf that continuously participates in Bitcoin’s proof-of-work — at R1.60/month, it’s essentially free continuous participation.
• Load-shedding-proof mining kit: The Nerdminer S19 on a power bank is the ultimate load-shedding-proof mining setup — run it anywhere, through any outage, on any USB power source.

Frequently Asked Questions

Does the Nerdminer S19 need special electrical setup in South Africa?
No. It runs from any USB-C phone charger. No dedicated circuit, no electrician, no electrical modifications needed. If you have a phone charger, you have everything you need to run it.

Is the Nerdminer S19 actually mining Bitcoin?
Yes — it performs real SHA-256 proof-of-work and submits valid share attempts to the Bitcoin network. At 156 KH/s it’s mining at a scale that will almost certainly never find a block, but the hashing is real and every submission is a genuine lottery attempt.

What mining pool does it use?
The NerdMiner firmware is typically pre-configured for a public solo pool such as public-solo.ckpool.org. You can reconfigure it via the web interface to any compatible SHA-256 pool. For the true solo mining lottery experience, a solo pool is recommended.

Can it run during load shedding?
Yes — indefinitely on a basic power bank. Under 1W draw means even a small power bank provides many hours of runtime. It is completely load-shedding-immune.

What is the difference between the Nerdminer S19 and a real Antminer S19?
Everything except the case design. A real Antminer S19 delivers 110+ TH/s at 3,000W and costs thousands of rand. The Nerdminer S19 delivers 156 KH/s at under 1W and is a fun hobbyist device. The exterior is an artistic homage to the S19 form factor — inside, it’s a microcontroller running Bitcoin SHA-256 for fun.

What’s Included

• 1× Nerdminer S19 156 KH/s mining unit
• USB-C power cable
• Quick-start guide