Search found 79 matches

by Squonk42
Sun Oct 15, 2017 7:41 pm
Forum: Custom design boards
Topic: Alternative BluePill sized F4
Replies: 13
Views: 137

Re: Alternative BluePill sized F4

You may use the now obsolete IRU1206-33CY, also 1A, $11.15 / 50 PCE:
https://www.aliexpress.com/item/sku/32485042169.html

What about the strange traces I mentioned in my earlier post?
by Squonk42
Sun Oct 15, 2017 5:42 pm
Forum: Custom design boards
Topic: Alternative BluePill sized F4
Replies: 13
Views: 137

Re: Alternative BluePill sized F4

(4.6 - 3.3) * 0.27 = 0.35W (5.0 - 3.3) * 0.35 = 0.6W. Assuming a SOT25 with 184°C/W for tja, this is 0.6 * 184 = 110°C above ta, so you fry your chip if ta > 40°C. Not so unlikely in temperate countries behind a car windshield... Anyway, going to these extreme temperatures will decrease substantiall...
by Squonk42
Mon Oct 09, 2017 5:09 am
Forum: STLink
Topic: Ultra simple STM32 debugger
Replies: 28
Views: 740

Re: Ultra simple STM32 debugger

Nice, what about getting the sources so that we can help?
by Squonk42
Sat Oct 07, 2017 7:58 am
Forum: Libraries & Hardware
Topic: is GD32 chinese Cortex M4s a clone / relicensing of ST?
Replies: 26
Views: 537

Re: is GD32 chinese Cortex M4s a clone / relicensing of ST?

The truth is elsewhere: manufacturers like ST, TI, NXP, etc. are buying IP (Intellectual Properties) from various companies as building bricks to assemble their chips, including from ARM Ltd for the ARM Cortex core, as well as other vendors for things like UART, USB, LCD peripheral controllers or fo...
by Squonk42
Mon Oct 02, 2017 5:07 am
Forum: Off topic
Topic: PCB vendors - prices incl. shipment costs
Replies: 9
Views: 266

Re: PCB vendors - prices incl. shipment costs

In France, the VAT is not due if it is < 5€. Above that, you take your chances... If controlled, you may have to pay the VAT, which is collected by the carrier. However, if the carrier has the exact custom code for each part in the shipment, they should not charge additional fixed (30€) custom fees,...
by Squonk42
Sun Oct 01, 2017 1:00 pm
Forum: Off topic
Topic: PCB vendors - prices incl. shipment costs
Replies: 9
Views: 266

Re: PCB vendors - prices incl. shipment costs

At the beginning of the summer, I've used http://allpcb.com for 10pcs at $4.99, but since I've needed it shipped quickly to Canada by DHL, shipping cost $25, and when parcel arrived, DHL custom broker service charge me an additional $15 charge. Total became US$45. Hi Martin, Here in EU, both UPS an...
by Squonk42
Sun Oct 01, 2017 12:54 pm
Forum: Off topic
Topic: PCB vendors - prices incl. shipment costs
Replies: 9
Views: 266

Re: PCB vendors - prices incl. shipment costs

Here is a fair price comparison site for PCBs:
https://pcbshopper.com/

Kinda single-operated website from a guy that developed scripts to automatically fetch the prices from many vendors, not taking a commission upon redirection.
by Squonk42
Sun Oct 01, 2017 10:14 am
Forum: General discussion
Topic: STM32-Based Programmable Hand Tools
Replies: 1
Views: 164

STM32-Based Programmable Hand Tools

Although not exactly related to Arduino on STM32, there have been a lot of recent blogs on HackaDay covering STM32-based (open-source) hand tools: PART SOLDERING IRON, PART HAND-HELD OSCILLOSCOPE A SCREWDRIVER FOR THE LAZY Original TS100 English Manual is here , schematic diagram is here , and origi...
by Squonk42
Sat Sep 30, 2017 8:27 am
Forum: STLink
Topic: Ultra simple STM32 debugger
Replies: 28
Views: 740

Re: Ultra simple STM32 debugger

Sorry, I am on Linux, others will be on Macs. So Windows only, no source => no go.

Unless you open source it so people can help you improve your idea and make it portable, this project is going to a dead end.

You can try Python or Qt to avoid proprietary traps like C#n F# or Java.
by Squonk42
Fri Sep 22, 2017 6:29 am
Forum: Off topic
Topic: NuttX on a BluePill
Replies: 52
Views: 1144

Re: NuttX on a BluePill

@acassis: thank you for your video tutorials, they are great! I had a small problem while flashing a Bluepill fresh out of its anti-static bag: I got this error message from openocd: Error: stm32x device protected I solved this issue by sending: openocd -f interface/stlink-v2.cfg -f target/stm32f1x....