I tried it about some LED.
When I used an electric current of 1mA, they occurred with the voltage of 1.8v from 1.5.v
(This applies to only me and may not apply to your device)
It was with generosity, and the sensitivity of the USB signal comparatively forgave these.
(Because I carried this out for an experiment purpose with an amateur, I cannot use it for close commercial eyes)
Everybody may not obtain the parts which I tried.
The LED of the board of the image does not understand a name.
I used next with another board.
STANLEY
BG1101W_1mA_1.8V_GaP
AA1101W_1mA_1.8V_GaAsP
They glitter at an H level and are easy to make the diagnosis of the circuit.
