Over in this thread I'm discussing using an accelerometer for highly sensitive readings: https://forum.arduino.cc/index.php?topic=481774.0
One of the things that came up, was that I should consider using a very low noise voltage supply. This issue has come up a few times in projects, but I'm not sure exactly what is the best cost-effective way of doing this.
I've heard about 'linear regulators' which seem to be the ideal thing (inefficient but accurate)
There are some products like this one for ~69cents / piece LM317 DC Linear Regulator DC-DC 4.5~40V Turn 1.2~37V Step Down Power Module Adjustable
And some from the hifi market which are more expensive at $18 / piece LT3042 Ultra Low Noise Linear Regulator Power suoppy / Single Voltage Output 5V For Amanero XMOS USB DAC Core Power Supply
These more expensive ones have much larger capacitors, and quote noise at 2nV at 10kHz. (The cheaper ones do not quote a noise level).
Would the first type of product have any improved performance over the 5V step down power supply built into an Arduino UNO, or a 240V switched mode 5V 2000mAh (phone charger type) USB power supply?
Thank you Elliot