BJT is a current controlled device, where the output current is controlled by the input current.
In this article I provide formula to calculate base resistor. (and test MathJAX)
article
it is possible to use estonian identity card in manjaro linux (arch linux based).
install the middleware to access smart cards:
# pacman -S pcsclite pcsc-tools ccid
enable and start pcscd service:
# systemctl enable pcscd# systemctl start pcscd
now you can test your estonian identity card. run "pcsc_scan" application in console. if the card is unresponsive, then try inserting it again: