I used to have a film canister with a big resistor in it, and crocodile clip leads for this job. Like I said though, make sure you are confident you know what y

I used to have a film canister with a big resistor in it, and crocodile clip leads for this job. Like I said though, make sure you are confident you know what you are doing. Some tricks, fit the clips entirely with one hand, and put your other hand in your pocket. You are trying to avoid a shock across your heart...