Breakout Board mit dem ACS712 Stromsensor (Messbereich bis 5A). Durch einen zusätzlichen Operationsverstärker (Verstärkung von 4,27 - 47 einstellbar) auf dem Board, ist es möglich auch kleine Ströme zu messen.
This current sensor gives precise current measurement for both AC and
DC signals. These are good sensors for metering and measuring overall
power consumption of systems. The ACS712 current sensor measures up to
5A of DC or AC current. We added an opamp gain stage for more sensitive
current measurements. By adjusting the gain (from 4.27 to 47) you can
measure very small currents.
The ACS712 Low Current Sensor Breakout outputs an analog voltage that
varies linearly with sensed current. To calibrate, first set the output
offset to the desired level (with zero current on the sense lines, read
output with a DVM). Then with a known current input (a 100mA limited
supply works well for this), set the output deflection with the gain
pot. Sensitivity is then calculated as (Vref - Vdeflect)/(current
The bandwidth on the ASC712 Low Current Sensor Breakout has been set to
34Hz to reduce noise when using at high gains. The full 80KHz bandwidth
that the sensor is capable of can be recovered by removing C1. See
schematic for more details.