I want to make electric burners for modeling tricks like igniting a rocket engine.
An SMD resistor is taken, the supply wires are connected and the whole thing is covered with an incendiary mixture with a high burning temperature.
When a large current passes through the resistor, the resistor heats up until it "burns" and this causes the mixture around the resistor to burn.
For 12V and above I use a 500m Ohm resistor, size 0402 or 0603.
From an electronics perspective
voltage source. NiMH or LiOn simply a rechargeable battery typically extracted from a used battery for models or hand tools.
Voltage theoretical 3.2 - 3,7 V , internal resistance, only god knows
Switching element: MOSFET in SOT23 ,RdsOn 40mOhm
The transistor controls the ultra-small MCU, for example the PIC10 in the role of a timer
Parasitic resistance, wires, switch u to 50mOhm.
now we come to the question, what resistance is optimal for a resistor for burners?