This circuit uses a FET to drive an LED with constante currente. The current up to 20 mA can be adjusted by the trimpot. The circuit can use JFET equivalents to the BF247B. Ths circuit is suggested by Texas Instruments.
This circuit uses a FET to drive an LED with constante currente. The current up to 20 mA can be adjusted by the trimpot. The circuit can use JFET equivalents to the BF247B. Ths circuit is suggested by Texas Instruments.
