Search found 1739 matches

by Pito
Thu Jan 25, 2018 2:26 pm
Forum: Off topic
Topic: SMD, reflow, beginner
Replies: 12
Views: 235

Re: SMD, reflow, beginner

I did smds and BGAs with hot air, no stencil, no solder paste, but a lot of flux and pre-tinned pads only.. Needs some training to get the temperatures/air pressure/etc. right. BGAs yield 80% after some experiments.. For flatpacks/bgas you would need bigger nozzles (>=10x10mm). My settings (power/ai...
by Pito
Wed Jan 24, 2018 9:34 pm
Forum: STM32F4 Boards
Topic: [libmaple] Generic F407VE mini (vcc-gnd version)
Replies: 48
Views: 1341

Re: [libmaple] Generic F407VE mini (vcc-gnd version)

SW1 - Card Detect switch.
by Pito
Tue Jan 23, 2018 5:15 pm
Forum: Projects
Topic: Metal detector dc42 improvment
Replies: 35
Views: 920

Re: Metal detector dc42 improvment

It depends whether the can comes from US or from Europe.. Two different alloys, I think..
by Pito
Mon Jan 22, 2018 10:05 pm
Forum: Problems with libraries
Topic: [SOLVED] OLED_I2C
Replies: 5
Views: 189

Re: OLED_I2C

Show your sketch..
by Pito
Mon Jan 22, 2018 9:01 pm
Forum: STM32F4 Boards
Topic: [libmaple] Generic F407VE mini (vcc-gnd version)
Replies: 48
Views: 1341

Re: [libmaple] Generic F407VE mini (vcc-gnd version)

Insert your sdcard in the socket on your 407 mini board and try an SdFat SPI demo. Set the sdcard's chipselect/cardselect in the sketch properly.
CS (or card select) is pin2 on the socket -> PC11.
by Pito
Mon Jan 22, 2018 8:35 pm
Forum: STM32F4 Boards
Topic: [libmaple] Generic F407VE mini (vcc-gnd version)
Replies: 48
Views: 1341

Re: [libmaple] Generic F407VE mini (vcc-gnd version)

Does the SPI interface work with the sdcard?
by Pito
Mon Jan 22, 2018 8:09 pm
Forum: STM core: Bugs and enhancements
Topic: [Solved] Arduino Core for STM32 v2018.1.18 Problem
Replies: 24
Views: 563

Re: Arduino Core for STM32 v2018.1.18 Problem

Market share desktops/notebooks: Win 88.9%, Linux 2.3%.. :)
by Pito
Mon Jan 22, 2018 7:40 pm
Forum: STM32F4 Boards
Topic: [libmaple] Generic F407VE mini (vcc-gnd version)
Replies: 48
Views: 1341

Re: [libmaple] Generic F407VE mini (vcc-gnd version)

@efftek: does the usb connector power the board actually? (sometimes the microsocket's pins are not soldered properly). Also the resistor dividers around boot switches have got values which are not the best choice.. I would replace the 10k pulldowns with something like 47k-100k.. ..version for F4 th...
by Pito
Sun Jan 21, 2018 2:26 pm
Forum: Libraries & Hardware
Topic: SdFat works with 256MB, but not with 4GB SDHC
Replies: 10
Views: 287

Re: SdFat works with 256MB, but not with 4GB SDHC

The smaller the SDcard the faster. Try to decrease the clocks.
Start at 72MHz main clock and 9-18MHz SPI for the SDcard.
by Pito
Sat Jan 20, 2018 9:21 am
Forum: Projects
Topic: Time interval counter (13ns resolution)
Replies: 8
Views: 333

Re: Time interval counter (13ns resolution)

When you say 72MHz/2, were you measuring a 36MHz PWM?
Those 30Hz were measured at 36MHz output. Thus with 72MHz it will be 60Hz. The OCXO was free running, none disciplining.