To everyone who purchased a periodic table to help support this project:
Many, many thanks! I can’t easily express how grateful I am for your generous support! I’ve chosen to quit my job to pursue my passion of open source scientific devices, and your support goes directly towards furthering this project.
I just received the first visible result of your help – a shipment of components. These are mostly op-amps, voltage regulators (silver bags on the left), capacitors, and piezo disks (clear bags on the right). This shipment will solve several power supply and signal issues – - the +2.5V signal will actually be +2.5V now, significant improvement over the unreliable voltage divider I was using previously.