The cryptocurrency mining market is currently dominated by Application Specific Integrated Circuits, or ASICs, which are highly effective, high speed, circuits designed specifically to mine a single cryptocurrency using a single algorithm. However, there exist coins on the cryptocurrency market that continually change the algorithms defining their blockchain, thus rendering ASICs useless. GPUs have been used for many years to achieve the same purpose, but use a large amount of power. Field-Programmable Gate Array (FPGA) cryptocurrency mining rigs have the potential to compete with popular GPUs in terms of performance and power efficiency. We focused on implementing the SHA-256 hashing algorithm due to its modularity and wide use in many different cryptocurrencies. Our implementation successfully hashed and output the results through serial communication. The low power consumption allows relatively effortless scaling of 50+ simultaneous SHA-256 instances to generate a Mhash/Watt metric that competes and even surpasses that of some popular GPUs.