I used the solenoid valve from a Glade air freshener to control the disbursement of butane . I used a 300kV boost coil to generate a continuous spark. A single button triggers the release of butane through the solenoid and the spark. I mounted the entire assembly to a leather wrist-guard.
This project is awesome but you really need a flashback arrestor to make this 100% "safe" to use. I don't think the risk is high considering the flowrate but in any event it'll save your arm if an errant flame manages to get back up the line.
This project is awesome but you really need a flashback arrestor to make this 100% "safe" to use. I don't think the risk is high considering the flowrate but in any event it'll save your arm if an errant flame manages to get back up the line.