Load resistors are 5 ohm
One is always in-line and the second is added in parellel by the switch.
Switch off - 5 Volt = 1.0 Amp x 5.0 Ohm
Switch on - 5 Volt = 2.0 Amp x 2.5 Ohm
The Red Led is on when current is flowing.
Glenn Lyons VK4PK
Ver:gnl2020mmdd - pre published v0.9