Project INFRA #3
The borosilicate glass tubes arrived! So did the light barriers.
I quickly soldered a prototype on a piece of perfboard and hooked it up to my oscilloscope to measure the falling speed of anything I drop through the glass tube.
A rough calculation tells me I’m in the ball park and there should be enough accuracy to scale up to higher speeds which will be required for the actual coilgun setup.
Timing will later be done using an Atmel Atmega32U4 (probably) with options to go nuclear using a CPLD or maybe even an FPGA. No reason not to go insane ;-)
After all, I’ve got those components still around form a previous project.
Updates will follow.