I am new to electronics and I have been wanting to design a countdown timer to automatically fire my rocket igniters.
Here is the youtube link
Here is the schematics for it
the equipment required would be:
Arduino UNO R3 (recommended for beginners with Arduino)
7 segment Serial Display
yellow arcade button
protoboard / protoshield
missile switch cover
10k ohm resistors
tupperware box or 3D printed case for the electronics
my questions which come to mind are
The capacitor acts like a small battery correct?
the n-channel transistor what does this actually do?
the 1N4001 what does this do?
the 5V relay what does that do? switch currents?
do all the negative wires connect to just 1 GND slot or do I use a separate GND slot for each jumper wire? do I use a breadboard for this whole thing or a protoboard?
I wish this schematic included a diagram of how to setup the jumper wires.
These resistors with varying Ohms… why not use a standard 460ohms resistors for the entire circuit board? I know this sounds like a stupid question but I don’t know electronics well enough to answer this question. Appreciate all the help.