Electromyography deals with the detection, analysis and use of the electrical signal that emanates from contracting muscles. Electromyographic (EMG) signals have applications in many areas. Electromyographs can be very bulky and expensive. There are many alternatives to professional electromyographs, both commercial and academic. However, these options are still too expensive, have too few or a single channel. The objective of this work is to implement a low-cost multichannel surface EMG acquisition platform. The platform must have high-quality, scalability, analog-to-digital conversion and the possibility to run both in stand-alone mode and connected to a computer via USB interface. The proposed platform has three main components: dedicated acquisition board, Tiva module and acquisition software. We validate the proposed acquisition board design by testing its frequency response, circuit amplification and common mode rejection rate.