Safely measure secondary ignition with an USB oscilloscope.
The voltages on the secondary side of an ignition system are too high to be measured directly. To safely measure these signals, the Ignition Pickup TP-IP250 can be used.
The Ignition Pickup TP-IP250 is a capacitive secondary ignition pickup, which can be clamped around a spark plug wire. The pickup has a ground wire with a large alligator clip. The pickup is fitted with a male BNC terminal, a BNC to 4 mm banana converter is included to connect measure leads with banana terminals.