Gerald T
Member
Hi All,
I am attempting to make my own altimeter. I designed an ematch firing circuit which I believed should have worked and allowed the microcontroller I am using to detect continuity when activated (Like a commercial altimeter). However, when I assembled the PCB and tested it, the ematch fired the moment I plugged the battery in. When I removed R3 from the circuit, everything works nominally, so I assume it's an issue with my continuity checking circuit.
The U6 Terminal block is where the ematch is connected. The ematch is fired by activated the PY1 output pin on the arduino nano microcontroller I am using. The idea was to be able to read current through the CONTREAD pinout on the microcontroller in order to tell if the circuit had continuity through the ematch.
Any ideas what I am doing wrong with this circuit and how it can be fixed? I don't have much experience with electronics.
Thanks,
Gerald T.
I am attempting to make my own altimeter. I designed an ematch firing circuit which I believed should have worked and allowed the microcontroller I am using to detect continuity when activated (Like a commercial altimeter). However, when I assembled the PCB and tested it, the ematch fired the moment I plugged the battery in. When I removed R3 from the circuit, everything works nominally, so I assume it's an issue with my continuity checking circuit.
The U6 Terminal block is where the ematch is connected. The ematch is fired by activated the PY1 output pin on the arduino nano microcontroller I am using. The idea was to be able to read current through the CONTREAD pinout on the microcontroller in order to tell if the circuit had continuity through the ematch.
Any ideas what I am doing wrong with this circuit and how it can be fixed? I don't have much experience with electronics.
Thanks,
Gerald T.