Servo tester with watt meter(voltage and current) + display Part1
function required: Manual mode(VR or rotary encoder), Centering mode, sweep mode(low limit(800-1400ms)and high limit(1600-2200) settable, sweep speed adjustable) servo supplier voltage adjustable(5-7.2 or 8.4V?) or (by pass and lower to 5V) Current(5~8A should be good) and voltage monitor. Display. current position, voltage, current digital put put for chart plotting(Arduino IDE?) Option: servo signal Frequency setting 50Hz? First select the current sensor and voltage module. I have plenty on hand, basically divided into 2 category: analog current sensor(voltage to be calculated with voltage divider) such as AS712, Max471, But you will need a MCU with good ADC, I plan to use esp32 for better display effect, but esp32 has bad ADC. Also if you switch between 5V and 3V MCU, the voltage divider need to be different. digital ones. Which has integrated good ADC and voltage divider, and usually has power meter function. and can be powered with 3.3 or 5V. The down side is that digital one