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Issue #213 April 2008
Programmable Power
Build a Simple USB DAC
by Yoshiyasu Takefuji
Start | USB Communications | Firmware | MAX517 (DAC) Programming | Firmware, Software, & LIBUSB | Host Device Driver Installation | Testing | Sources & PDF
TESTING
When you can successfully generate volt.exe and write da.hex files in the ATtiny45’s flash memory with the fuse settings, type “volt 2.5” in the Cygwin window and measure the voltage at a MAX517’s PIN1 with a voltmeter.
In this article, I described a simple programmable USB DAC featuring an ATtiny45 and a MAX517, which can be used as a programmable power supply. Because two-wire serial programming is used to set the D/A data in a MAX517, multiple channel DACs can be easily implemented with a MAX518 or a MAX519.
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