Arduino enthusiast John Gonzales returns with another interesting Arduino-based project - a multi-channel digital voltmeter. However unlike other simpler efforts, John has increased the input impedance to allow for more accurate readings - and with some voltage-division maths you can increase or decrease the maximum voltage to measure. The only drawback is that you can only measure voltages with respect to ground, however it's an interesting meter and demonstrated in the following video:
Furthermore you could expand on this by sending the data back to a PC for capture, display and analysis. To get started, visit John's Instructable page. And for more, we're on facebook, Google+, and twitter - so follow us for news and product updates as well.
Need an OLED for your projects? Check out our 128x128 pixel OLED Module. With a diagonal size of 1.5" and 16,384 colours to select from, so almost anything is possible. Furthermore there's a microSD card socket, and removable tabs on each side which can hold LEDs and buttons:
And using the module is made simple - we have tutorials and drivers for both the Arduino and Raspberry Pi platforms - great for experimenters or those who use both systems. Furthermore, check out the forum where members are already creating modified drivers to rapidly increase the display speed. For more information including our Quickstart guides - and of course to order - visit the OLED Module product page.