Search found 72 matches

by efftek
Thu Jun 15, 2017 7:10 am
Forum: General discussion
Topic: Resolved: Which bootloader? (To not flash PC13 on a Blue Pill)
Replies: 3
Views: 106

Re:Which bootloader? (To not flash PC13 on a Blue Pill)

Cheers Roger

I considered using one that flashed a pin which isn't on the blue pill but wasn't sure if that could cause it to hang, trying to access non existent registers but if you are correct, then that shouldn't be a problem.
by efftek
Wed Jun 14, 2017 11:23 pm
Forum: General discussion
Topic: Resolved: Which bootloader? (To not flash PC13 on a Blue Pill)
Replies: 3
Views: 106

Resolved: Which bootloader? (To not flash PC13 on a Blue Pill)

For my project I have an adapter board for a blue pill, connecting it to several push button switches to navigate my menus and also to a tft screen to display my data etc. Now, I have two switches connected in series, ie both have to be pressed simultaneously to be detected and these switch the tft ...
by efftek
Sat May 20, 2017 10:23 pm
Forum: General discussion
Topic: blue pill prototyping board with tft adapter
Replies: 11
Views: 428

Re: blue pill prototyping board with tft adapter

zoomx wrote:Maybe a power connector like the one in Arduino UNO.
Instead of the pins or the terminal block or as well as? - the socket is only a few pence so I've ordered some.
by efftek
Sat May 20, 2017 10:12 pm
Forum: General discussion
Topic: blue pill prototyping board with tft adapter
Replies: 11
Views: 428

Re: blue pill prototyping board with tft adapter

efftek wrote:I may just have to lie in the sun for two weeks and drink retsina!
Yeah, like Bev will allow that!
by efftek
Sat May 20, 2017 10:08 pm
Forum: General discussion
Topic: blue pill prototyping board with tft adapter
Replies: 11
Views: 428

Re: blue pill prototyping board with tft adapter

Good point.. I guess a kit would probably need through hole regulators. Which cost more than smd's negating any savings. Btw, this isn't the finished product of the board I sent you, that one has moved on a bit with a rechargeable LiPo battery and improved layout for the navigation keys. I've also ...
by efftek
Sat May 20, 2017 4:15 pm
Forum: General discussion
Topic: blue pill prototyping board with tft adapter
Replies: 11
Views: 428

Re: blue pill prototyping board with tft adapter

@Andy, yes its fully assembled. I'd probably still have to assemble the smd's not everyone can do that. Also, I can guarantee it's working if I assemble and test.

I could sell a cheaper one with sockets and no blue pill I suppose.
by efftek
Sat May 20, 2017 8:28 am
Forum: General discussion
Topic: blue pill prototyping board with tft adapter
Replies: 11
Views: 428

blue pill prototyping board with tft adapter

Guys, I now have a prototyping board on eBay http://m.ebay.co.uk/itm/192192445430?_mwBanner=1 I'm selling it for £19.50, I know its not as cheap as Chinese but I am only doing batches of 10 and only buying small numbers of parts. There's also a video on YouTube. https://m.youtube.com/watch?v=zrMEeFS...
by efftek
Mon May 15, 2017 2:09 pm
Forum: General discussion
Topic: A question of grounding
Replies: 0
Views: 134

A question of grounding

Hi, I'm designing a board based on an STM32F103R series. The board is powered by a 5000mAh LiPo which is boosted to 5V by a MAX982 charge pump this in turn supplies two 3v3 LDO's with a ferrite bead between the grounds so I have separate analog and digital power supplies. I want to measure vibration...
by efftek
Sat May 13, 2017 1:00 pm
Forum: General discussion
Topic: Blue pill usable pins
Replies: 3
Views: 351

Re: Blue pill usable pins

As SteveStrong says, boot0 has its own pin, boot1 however is also PB2, maybe that's what you read. I believe boot1 is only used if boot0 is high at start up but don't quote me. PB3 and PB4 are unable as inputs as I have just learned today but you have to disable debugging with the following line in ...
by efftek
Sat May 13, 2017 7:20 am
Forum: General discussion
Topic: whats with PB3 & PB4?????
Replies: 2
Views: 268

Re: whats with PB3 & PB4?????

@ag123, thank you so much. That sorted my problem.

Steve.