Small question about the boost circuit
Closed this issue · 3 comments
I was looking at the cirucit for the stepup voltage converter and was wondering why you didnt step up the wheels 4.5v pin instead of boosting the 3.3v one? I am currently editing the pcb to work in my current wheel design and I wanted to power a raspberry pi off of it to run a sim hub display and wanted to ask if you think that the boost converter could supply the everything plus the raspberry pi and screen which i have mesured to draw about 0.5 to 0.8 amps at any given moment.
Hi!
We did so in the project because the 3,3V is powered at first by the base.
5V pin is powered later and too late to establish a SPi communication with the base.
If you wish to power your RPi and the screen, I would advise you to use the 5V pin and the USB 5V pin.
I don’t know how much currrent the base can provide safely but I wouldn’t expect too much of it.
I would suggest you to use a microcontroller to unlock the base FFB and handle the SPI communication and use the RPI to handle buttons and screen.
I don’t think the RPi alone can fire up quickly enough at base startup to unlock FFB.
I have been trying to use the 5v usb pin with the usb ground but it ends up having a weird interaction. Sometimes when the wheel is attatched the wheel goes into safe mode then reboots and does the spinning calibration thing. However sometimes I can get it working by plugging the Rpi in after the wheel connects. I think ill try boosting the 4.5v circuit for just the RPi and the 3.3 for the arduino. Thanks for your input!