Future Electronics Faraday User manual
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Faraday Current Sense and Measurement Solution
Quick Start Guide
2. Faraday Overview
Faraday is a simple platform designed by Future Electronics System Design Center to demonstrate current
sensing designs. It implements four channels with current sensors controlled by two Infineon PSoC 4
(CY8C4245) microcontrollers to measure voltage, current and power. Channel 1 and 2 are isolated channels
implemented with two Melexis integrated magnetic current sensors (MLX91220) controlled by Infineon
PSoC 4 (CY8C4245) (marked as PSoC-A on block diagram) to measure DC current up to 25A / 60V via
terminal block connections. Channel 3 is designed for current measurement up to 5A / 20V via an USB Type
C port connection, using Vishay current sense resistor (WSL series) combined with Diodes Inc. current
monitor (ZXCT1086) and Infineon PSoC 4 (CY8C4245) microcontroller (PSoC-B on block diagram). Channel 4
can measure up to 300mA / 5V via a USB Type A port connection using the same PSoC-B microcontroller as
channel 3.
The PSoC-A is also controlling the communication to PC through USB/UART bridge (CY7C65213). And the
PSoC-B controls user interface with capacitive touch keypad user buttons and the WiseChip OLED display to
show current, voltage and power measurement results.
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Faraday Current Sense and Measurement Solution
Quick Start Guide
3. Operation Instructions
•Faraday Setup:
Faraday is designed as a pocket power meter to measure Voltage, Current and Power going through
any of the 4 channels. Below are the four setup configurations can be used:
•Channel 1&2 (60V 25A):
1. Connect Power Source and Device Under Test (DUT) in series to Channel 1 (or 2) to
measure Voltage, Current and Power as shown in Figure 1
2. Connect Channel 1 for the input and Channel 2 for the output as shown in Figure 2
to measure DC power supply efficiency;
•Channel 3 (20V 2A)
3. Connect an USB Type C source to the CH3_IN connector and an USB Type C device
to the CH3_OUT connector to measure Voltage, Current and Power of an USB Type
C device as shown in Figure 3
•Channel 4 (5V 300mA)
4. Connect an USB device on the channel 4 USB-A connector to measure Voltage,
Current and Power of an USB device as shown in Figure 4
•Board Operation:
oSelect one of the test setups as shown above and connect the power and device
oConnect the Faraday board to a PC using USB port (J1) using the USB cable provided, the board
will enumerate as Serial COM Port
oPress the CHx button corresponding to the desired channel number (i.e. CH1, CH2 etc) on the
bottom right corner of the Faraday board to view measurement information on the LCD display
oPress buttons CH1 and CH2 together at the same time, power and efficiency information of the
channels 1&2 will be shown on the LCD display
•PC Terminal Connection (Optional)
Connect to the Serial COM Port (115200, N, 8, 1; enable local echo)
oRight after startup, press enter or type help and then press enter to view basic commands
oAfter a command is entered, pressing enter again will repeat the last command
oType “getall” to view all channels
oEnter commands such as “getall, getchx, getvx, getix, geteff12”, where x is the desired
channel number
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Faraday Current Sense and Measurement Solution
Quick Start Guide
Figure 1. Voltage, Current & Power Measurement Using Channel 1
Figure 2. Power Efficiency Measurement Using Both Channel 1 & 2
DUT
Power
Source
+
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+
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+
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+
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Power
Source
+
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DUT
DC/DC
+
-
+
-
IN
OUT
Load
+
-
+
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+
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Faraday Current Sense and Measurement Solution
Quick Start Guide
Figure 3. Voltage, Current & Power Measurement on USB Type C Ports Using Channel 3
Figure 4. Voltage, Current & Power Measurement on USB Port Using Channel 4
USB Type C
Power Source
USB Type C
Device
USB Device
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