We-VoltamoStat: A wearable potentiostat for voltammetry analysis with a smartphone interface

Abstract: Wearable technology, such as electronic components integrated into clothing or worn as accessories, is becoming increasingly prevalent in fields like healthcare and biomedical monitoring. These devices allow for continuous monitoring of important biomarkers for medical diagnosis, monitoring of physiological health, and evaluation. However, an open-source wearable potentiostat is a relatively new technology that still faces several design limitations such as short battery lifetime, bulky size, heavy weight, and the requirement for a wire for data transmission, which affects comfortability during long periods of measurement. In this work, an open-source wearable potentiostat device named We-VoltamoStat is developed to allow interested parties to use and modify the device for creating new products, research, and teaching purposes. The proposed device includes improved and added features, such as wireless real-time signal monitoring and data collection. It also has an ultra-low power consumption battery estimated to deliver 15 mA during operating mode for 33 hours and 20 minutes and 5 mA during standby mode for 100 hours without recharging. Its convenience for wearable applications, tough design, and compact size of 67x54x38 mm make it suitable for wearable applications. Cost-effectiveness is another advantage, with a price less than 120 USD. Validation performance tests indicate that the device has good accuracy, with an R^2 value of 0.99 for linear regression of test accuracy on milli-, micro-, and nano-Ampere detection. In the future, it is recommended to improve the design and add more features to the device, including new applications for wearable potentiostats.摘要：集成于衣物或作为配饰穿戴的可穿戴技术，正日益广泛应用于医疗健康与生物医学监测等领域。此类设备可实现对重要生物标志物的持续监测，用于医学诊断、生理健康状态追踪与评估。然而，开源可穿戴恒电位仪（open-source wearable potentiostat）作为一项相对新兴的技术，仍存在诸多设计局限：例如电池续航较短、体积庞大、重量较重，且需依赖线缆进行数据传输，这些问题都会影响长时间测量时的佩戴舒适度。本研究开发了一款名为We-VoltamoStat的开源可穿戴恒电位仪设备，供相关人员使用、修改，以用于新产品开发、科学研究与教学场景。该设备新增并优化了多项功能，例如支持无线实时信号监测与数据采集。其搭载的超低功耗电池可实现：工作模式下以15毫安电流续航33小时20分钟，待机模式下以5毫安电流续航100小时，无需外接充电。该设备适配可穿戴场景的便捷性、坚固的结构设计以及67×54×38毫米的紧凑体积，使其十分适合可穿戴应用场景。成本可控是其另一优势，单台售价低于120美元。性能验证测试结果表明，该设备具备优异的检测精度：在毫安、微安及纳安级电流检测场景下，其检测准确度的线性回归决定系数（R²）可达0.99。未来可进一步优化该设备的设计并拓展更多功能，包括拓展可穿戴恒电位仪的全新应用场景。