@Norton posted:Pittman would be best but the 555 with a PTC woukd be a better choice than a Canon. These at least have a decent track record of not destroying themselves.
I put ERR in a Williams Niagara with a 555 for a local club that has been running it at least hundreds of hours if not thousands with no problems other than tires.
Pete
The 555 doesn't work with my electronics setup. The stall is way to high and trips the legacy circuit and puts it into safety mode.