The JUAMI potentiostat is a cheap (<$100) potentiostat built on the Arduino platform for use in classroom demonstrations and simple research. It can carry out electrochemical scans such as one would use for testing performance of an electrochemical cell or battery. It was developed by a team from JUAMI, the joint undertaking for an African Materials Institute (www.juami.org) which has a mission to help develop research collaborations in materials science between US and African researchers. Pytentiostat is python code for running the potentiostat. For more information, contact Prof. Simon Billinge at email [email protected]