This information may be of value to someone wanting to use a MJG Firewire Initiator electric match with a low voltage single cell LiPo battery. While the minimum all fire energy is published for the J-Tek igniter, this data is not available for the Firewire Initiator.
We tested a small number of the Firewire initiators. They all ignited at 15 mJ or less with a 3.7V power supply. The lowest energy we saw ignition was 7 mJ. These tests were done with a battery at 3.7V and a variable pulse width. For short pulse widths (low energy tests) we got no ignition so we can see that the threshold is somewhere near the 15 mJ. Of course I would want to test 1000 of these to know what the actual minimum firing energy is but our system should always send at least 800 mJ so we will always have a large safety margin I think.
Note that the minimum all fire current of 0.6 Amps is required based upon data found on the MJG website.
We tested a small number of the Firewire initiators. They all ignited at 15 mJ or less with a 3.7V power supply. The lowest energy we saw ignition was 7 mJ. These tests were done with a battery at 3.7V and a variable pulse width. For short pulse widths (low energy tests) we got no ignition so we can see that the threshold is somewhere near the 15 mJ. Of course I would want to test 1000 of these to know what the actual minimum firing energy is but our system should always send at least 800 mJ so we will always have a large safety margin I think.
Note that the minimum all fire current of 0.6 Amps is required based upon data found on the MJG website.