FLIGHT

Dev Blog 5 Fixed major errors which didnt allow the battery charging circuit to work thickned traces for power and addedd silkscreen graphics to the front and back :). I belive that the pcb is finshed and ready to be sent to jlcpcb. Now i need to work on the code aspect of this project.

Dev Blog 4 finalised the schematic with the sd card breakout and new sensor. finshed charging circuit. added a servo control and boost circuit to power the servo established rough layout and size for pcb finding it hard to make it compact and route everything but trying to do it to the best of my ability and take my time. :)

Dev blog 3 i found a new solution for the sensors i was planning to use :). While scrolling on aliexpress for parts i found a +-16g IMU that has a built in pressure sensor, these are the two main datapoints that i am trying to collect with this flight computer. because of the part that i found i decided that i will probbably add some type of servo control that can for example deploy the parachute at apogee or something else. the module is called the MPU-9250 and it has a 10dof imu with a bmp280 and digital compass which could show us how the rocket rolls throughout spaceflight. i belive that 16g should be enought for smaller model rockets class d/e from research online so there shouldnt be a bottleneck. i finshed the schematic for the charging module however i am still deciding if i should integrate it into the pcb or solder on a module. the goal is to make it low cost so that anyone can make it as cheaply as possible without any drawbacks on performance. live data transmition isnt in my scopes right now because on short rocket launches it isnt really worth the extra hassle and parts for me at least. maybe in a future revision i will add a gps chip for live tracking however i want to start a prototype first. Next step: order parts and assemble on breadboard.

devblog 2

currently having some problems with the battery charging circuit but trying to overcome it with the help of google gemini and schematics/datasheets off the internet 95% of the charging circuit is done.
next step will be to order a imu rp pico and pressure sensor to hookup and test on a breadboard.
still deciding what exact parts to use. things arent going the best but im learning so thats good :)

DevBlog 1

Im making a datalogger for a model rocket using a raspberry pi pico running off of a lipo battery which can log altitute and g force.

currently i have been doing the battery charging circuit in kicad.