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by zmemw16
Tue Jan 17, 2017 12:49 am
Forum: STM32F4 Boards
Topic: Bluepill with STM32F4
Replies: 19
Views: 395

Re: Bluepill with STM32F4

what package were the ceramic caps ? leads or smd
any convenient cap to replace and / or rewire the pads

is that PB11 the bluepill pin on the pcb, or pb11 on the cpu or something entirely different ?

any other mods needed ?

stephen
by zmemw16
Tue Jan 17, 2017 12:02 am
Forum: Maple mini
Topic: USBserial don't works - what's wrong?
Replies: 29
Views: 328

Re: USBserial don't works - what's wrong?

i use stlink pretty much for all, even 'baite MM'.
if i use MM then stlink is not available, so i tend to use generic 103c and b variant

why should it make a difference, if so what is/are the difference(s) ?

stephen
by zmemw16
Mon Jan 16, 2017 11:27 am
Forum: Generic STM32F103
Topic: ebay 103c8t6 oled, nrf24, esp8266 + empty pads
Replies: 28
Views: 680

Re: ebay 103c8t6 oled, nrf24, esp8266 + empty pads

i've just re-read this thread.
oh, so i didn't actually need to solder those resistors in :roll:
srp
by zmemw16
Sun Jan 15, 2017 12:38 am
Forum: STM32F4 Boards
Topic: f407vet6 & f407zet6
Replies: 36
Views: 1041

Re: f407vet6 & f407zet6

FYI - I got the 407ZET6 board as per stephen's link in the first post. After connecting the USB it installed the driver, and it is showing 2 new removable storages E: and K:, device description SD flash disk, manufacturer ALIENTEC :) PS: the schematics and pcb layout on the wiki is from board rev v...
by zmemw16
Sat Jan 14, 2017 10:54 am
Forum: General discussion
Topic: printf and boot question
Replies: 6
Views: 96

Re: printf and boot question

search of my posts with mini_ & zet yielded:- http://www.stm32duino.com/viewtopic.php?f=28&t=490&hilit=zet+mini_#p4760 there's a whole host of these boards, all have switch on/off, intolerant of 12v as its a 5v in, vet6 or zet6 versions, then it's +/-sdcard, +/-tft connector, male/female...
by zmemw16
Wed Jan 11, 2017 5:57 pm
Forum: Generic STM32F103
Topic: Execute from external SRAM
Replies: 144
Views: 1157

Re: Execute from external SRAM

i put a bad picture of the small one on the wiki awhile back. if you follow the links for the variant below, there's a 'user guide', schemetic and sample code.(not sure for which board) code probably for SPL and uvision5(??) soldering 0603 resistors, intending to use finger nail holding one in place...
by zmemw16
Wed Jan 11, 2017 4:55 pm
Forum: General discussion
Topic: tape packaged soic with no dot
Replies: 0
Views: 43

tape packaged soic with no dot

i'm about to add an eeprom to one of the boards i got recently, ordered them and they duly arrived. now i've got 24c64 and 24c256, not quite sure how :? anyways it got worse, they don't seem to have a pin 1 indicator, spot or recess. i've only looked at eeprom data sheets for the dip pin outs! howev...
by zmemw16
Tue Jan 10, 2017 2:32 pm
Forum: Generic STM32F103
Topic: Execute from external SRAM
Replies: 144
Views: 1157

Re: Execute from external SRAM

Btw, I purchased this 407ZET board http://www.ebay.com/itm/STM32F407ZET6-STM32-Cortex-M4-Development-Board-Mainboard-60P-2-54mm-I-O-port-/201659011170?hash=item2ef3d05062:g:RzYAAOSwxg5XyT1Q (the SRAM pads and the Sdcard socket at the bottom side) on Dec4th and since Dec5th the board is in air, acco...
by zmemw16
Thu Jan 05, 2017 12:55 pm
Forum: Generic STM32F103
Topic: ebay 103c8t6 oled, nrf24, esp8266 + empty pads
Replies: 28
Views: 680

Re: ebay 103c8t6 oled, nrf24, esp8266 + empty pads

regarding alternate functions, 407xx pdf has 9 pages of it, i'm wondering if there's the same or more for 103. what chance the same mapping ???? well, found them and most definitely not the same format / mechanism RM0008 Reference Manual STM32F101xx, STM32F102xx, STM32F103xx, STM32F105xx and STM32F...
by zmemw16
Wed Jan 04, 2017 11:39 am
Forum: Off topic
Topic: Schema for 12V relay board ?
Replies: 19
Views: 185

Re: Schema for 12V relay board ?

change that 1k5 to something to give 3v3 max and it'll be safe, work for both and forget needing to check it in the future :)
srp

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