Search found 1738 matches

by Pito
Tue Feb 20, 2018 5:49 pm
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 768
Views: 15219

Re: F405 & F411 versions of the BluePill

Which means that the ferrite bead between GND and AGND is useless IMHO. I would suggest to make some practical measurements - with 0ohm and with FB. The topic is pretty tricky, so better do make measurements (various FB values) and compare on your first release pcb, rather than throwing FBs out in ...
by Pito
Tue Feb 20, 2018 3:40 pm
Forum: Projects
Topic: LSE RTC calibration
Replies: 7
Views: 90

Re: LSE RTC calibration

You cannot beat the DS3231, no chance. No crystal heater needed, no calibration, around one uA current in average, few secs/y off, not loosing time when BPill is flashed..
by Pito
Tue Feb 20, 2018 3:26 pm
Forum: General discussion
Topic: [all cores] F4+F1: ABP1 timer clock frequency
Replies: 1
Views: 41

Re: [all cores] F4+F1: ABP1 timer clock frequency

F4 - yes, there is a freq doubler when APB1,2 prescaler is not ==1 (see the CubeMX'es clock generator configuration tool).
I indicated 2y back the setPeriod() in F4 gives a wrong pwm period, it could be related to the setting as well..
F4 doubler.JPG
F4 doubler.JPG (23.4 KiB) Viewed 13 times
by Pito
Tue Feb 20, 2018 2:26 pm
Forum: Off topic
Topic: Any idea what this protocol is ????
Replies: 2
Views: 29

Re: Any idea what this protocol is ????

Which digital radio?
by Pito
Mon Feb 19, 2018 11:13 am
Forum: Off topic
Topic: Amiga on Out FPGA board
Replies: 3
Views: 68

Re: Amiga on Out FPGA board

Congratulation! Soldering such an FPGA requires a lot of courage! :)
by Pito
Mon Feb 19, 2018 11:12 am
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 768
Views: 15219

Re: F405 & F411 versions of the BluePill

Is there any list of mcus which fit onto the board (without any mods)?
by Pito
Mon Feb 19, 2018 12:28 am
Forum: STM32F4 Boards
Topic: [libmaple] Black F407VET6
Replies: 148
Views: 7048

Re: [libmaple] Black F407VET6

Any example for a simultaneous regular ADC sampling (2 ADCs sample a channel at the same exact time, no channel's scan - scan disabled)?
by Pito
Sun Feb 18, 2018 2:30 pm
Forum: Code snipplets
Topic: Reading Battery Voltage
Replies: 4
Views: 113

Re: Reading Battery Voltage

Do you switch off/on the bottom R2 divider resistor?
by Pito
Sat Feb 17, 2018 5:29 pm
Forum: Projects
Topic: Lightpen
Replies: 5
Views: 150

Re: Lightpen

Which electron beam you want to detect? There are 3 (when talking a color TV) :) Also mind in the areas where you see "black" no electron beam is present. Such lightpens worked: 1. you scanned with the ebeam "on" the entire screen (the scanning driven by some "electronics"), and when detected the li...