I already have accidently fried two perfectly good SLD1239JL-54 16x diodes by making careless mistakes in my homemade Daedal DDL driver circuit. In order to prevent mistakes on my third attempt, I want to know if there are such things as cheap diodes with similar electrical tolerance thresholds to a SLD1239JL-54 16x that are cheap and no big deal to fry. I want to be able to test my driver circuit with them before I place new SLD1239JL-54 16x on my driver. My driver uses a 3 ohm resistor, a 47uF 35 volt capacitor, uses 5 AAA batteries, and can range in current from 12 mA to 420 mA If there are such things as cheap expendable diodes that work with a Daedal DDL, please be sure to tell me what they are and where can I find them? If possible try to make sure there diodes that I can find in cheap and common electronics, ones that I don't have to order online. But if there is'nt any that are easily found in electronics found in retail stores, I would still be fine with buying them online. I would just prefer for them to be available in cheap retail store electronics. Thanks.