Tiny led voltmeter - help needed in finding the smallest one

[islisis]

seems these days programmable drivers offer a lot of flexibility…it might be possible to program one of these drivers to get the functionality needed

Knucklehead Buck Driver Discussion Thread

Discussion thread for the Knucklehead 4A Buck Driver by Mattaus. The Knucklehead is a switch mode buck driver capable of up to 4A continuous drive current. It can support 3-18V input and will drive a LED/string of LEDs provided Vout is less than Vin. The driver is based around the LED2001PHR IC from ST Micro. It has been designed to use leaded parts as much as possible to make assembly at home easy. As usual the design may not be optimal and better, more suitable, or cheaper parts may be avail…

re. Star firmware: STAR Firmware by JonnyC - Source Code and Explanation