1. Operation

USB Tester



Load resistors are 5 ohm One is always in-line and the second is added in parellel by the switch.

E=IR 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:gnl20201212 - pre published v0.9