Files in this repository are organized using the following folders:
Consolidated - contains information about all modules. That include schematics and PCB layout (Eagle, .png, PDF), BOM (.ods, PDF) with parts required to build complete dual channel unit (1 x Aux, 2 x Power, and 1 x Arduino Shield).
Use this as a primary reference for PCB manufacturing and assembling.
Aux power - information about Auxiliary power module only
Power board - information about Power board only
Arduino shield - information about Arduino Shield only
Mechanical - drawings for metal custom enclosure and acrylic demonstration enclosure.
This is repository for the hardware part of the DIY fully programmable dual channel bench power supply. The power supply is designed with taking into consideration the following features and requirements:
Modular design that allows combining modules with various performance and capability and creation of multiple output solution (min. two channels)
Voltage regulation (CV), 1/10 mV resolution, up to 50 V (default: 0 - 40 V)
Current regulation (CC), 0.1/1 mA resolution (multiple ranges, default: 0 - 500 mA / 0 - 5 A)
Minimal overshoot when new voltage or current level is programmed or in marginal cases such as power on/off
15-bit data acquisition resolution
Various protection mechanisms: over-voltage (OVP), over-current (OCP), over-power (OPP) and over-temperature (OTP), current limiting when temperature sensors or cooling fan fault is detected
SMPS pre-regulator circuit for lower power dissipation (using e.g. SMPS)
SMPS pre-regulator's "100% Duty cycle" mode of operation to lower output ripple and noise
Switching frequency synchronization if multiple SMPS are utilized
Output enable (OE) circuit
Remote voltage sense
Remote voltage programming
External digital trigger (3.3 or 5 V logic level)
Simple AC input protection (surge and transient protection)
Selectable 115/230 VAC with solid-state (not mechanical!) soft-start/standby circuit
Simple DC output protection (reverse voltage, over-voltage)
Serial and parallel connection of the multiple channels
MCU based digital control module using 32-bit ARM Arduino Due
SPI bus for communication with peripherals
Galvanic isolation between digital module and power channels
Real-time clock (RTC) with supercap/batter backup
EEPROM used as a configuration and calibration parameters storage
SD-card as an additional storage
USB support that can be used for remote control, as a debug console and firmware upload
Ethernet support for remote control
Local control using TFT touch-screen display
Incremental encoder with tactile switch as an additional mean of setting output values
Usage of easy to find components that could be obtain with just single order from suppliers such as Farnell element14, TMU.eu, DigiKey, Mouser, RS online, etc.
Possibility to house at least dual channel version in affordable and compact (2U height) metallic enclosure
Comprehensive software support that include SCPI remote control, GUI configuration and monitoring and even cross platform (Windows, Linux, OS X) software simulator of the firmware functionality
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