To accelerate the healing of patients after stroke and to facilitate the therapist in conducting post-stroke therapy, we need a tool that can facilitate the therapist to conduct post-stroke therapy, post-stroke therapy aims to avoid the occurrence of muscle wasting and stiff joints in the right hand. So in this study designed a post-stroke therapy aids to facilitate post-stroke therapy on the right hand. This tool is designed using the ATMega328P Integrated Circuit Microcontroller, LCD as a display, DC motor as a driving device, this tool has a voltage source in the form of power supply. The data collection method used is to measure the motor RPM, the voltage value on the power supply, the value of the stand on the motor and measure the timer parameters. In the RPM test the average of the highest weight of the 12 VDC input is obtained at the elbow movement when the contraction is 53.46 RPM and at the relaxation of 74.24 RPM and at the shoulder movement when the contraction is 28.47 RPM and when the relaxation is 75.22 RPM. Then in the timer testing on the 5 minute setting the correction value is 0.37 seconds with an average of 299.63 seconds. In testing the tool is obtained when testing the tool on the elbow can work well with 5 VDC and 12 VDC inputs and on the shoulder only works well when the input is 12 VDC.