Search found 85 matches

by fredbox
Mon Jun 26, 2017 2:05 am
Forum: General discussion
Topic: does stm32f1 gets too hot in a project box? and temperature sensor
Replies: 6
Views: 125

Re: does stm32f1 gets too hot in a project box? and temperature sensor

I bought my 3D printer last September and one of the first things I printed was an enclosure to hold a blue pill and a DB9 RS232 adapter board. The project has been powered on ever since I put it together. It doesn't feel the slightest bit warm. Power is from a 5V USB power cube like those used for ...
by fredbox
Thu May 25, 2017 10:39 pm
Forum: General discussion
Topic: blue pill board bricked by maple mini updater.ino
Replies: 33
Views: 695

Re: blue pill board bricked by maple mini updater.ino

If 57600 doesn't work with the STM flash tool, try 115200 or 230400.
I have several blue pill boards that aren't recognized at 57600 but work ok at a faster rate.
by fredbox
Sun Mar 05, 2017 5:18 pm
Forum: Projects
Topic: In car multigauge
Replies: 135
Views: 3723

Re: In car multigauge

rexnanet wrote:Or even I2C io expander like MCP23016 :)
The I2C adapter for 1602 LCD displays has a PCF8574. This would give you 8 additional 8 inputs or outputs. I see 5 pieces on Ali shipped for under $2 US.
by fredbox
Sat Feb 04, 2017 5:36 pm
Forum: Builds and Announcements
Topic: PHPBB hosting issues and problems at HostGator
Replies: 48
Views: 2143

Re: PHPBB hosting issues and problems at HostGator

I have the forum in my RSS reader and only log in if I want to post. I never noticed that anything was wrong.
by fredbox
Sat Jan 21, 2017 5:21 pm
Forum: Maple mini
Topic: USBserial don't works - what's wrong?
Replies: 39
Views: 1536

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

For the Arduino Community, changes can be difficult; stuff works OK in an older version but the IDE tosses all manner of errors/warning on just a simple '.1' upgrade. True. The latest 1.8.1 compiler throws all sorts of warnings that weren't there on 1.6.x, but my program still works as it always did.
by fredbox
Sat Jan 21, 2017 5:14 pm
Forum: Hardware
Topic: 1602 I2C LCD writing very dull.
Replies: 6
Views: 464

Re: 1602 I2C LCD writing very dull.

The 1602 is a 5 volt display. I would not expect it to work very well from 3.3 volts.
Looking at this data sheet, the allowable voltage range is 4.8 to 5.2 volts.
by fredbox
Sat Jan 21, 2017 5:06 pm
Forum: Generic STM32F103
Topic: "Black pill" board?
Replies: 19
Views: 1804

Re: "Black pill" board?

My boards arrived in this morning's mail. I was able to easily flash the bootloader and get them working. After flashing a blink sketch, the board enumerates properly: [Sat Jan 21 10:36:10 2017] usb 3-3: new full-speed USB device number 81 using xhci_hcd [Sat Jan 21 10:36:10 2017] usb 3-3: New USB d...
by fredbox
Sat Jan 07, 2017 2:24 am
Forum: General discussion
Topic: Changing HID FriendlyName
Replies: 12
Views: 551

Re: Changing HID FriendlyName

Try using USBDeview from nirsoft.net to uninstall the USB device.
by fredbox
Sat Dec 31, 2016 4:27 pm
Forum: Off topic
Topic: Schema for 12V relay board ?
Replies: 19
Views: 670

Re: Schema for 12V relay board ?

A search for "Arduino Relay Schematic" in Google images should find it. Chances are, it is this one.
If not, there are may more examples there.
by fredbox
Thu Dec 29, 2016 6:40 pm
Forum: Generic STM32F103
Topic: "Black pill" board?
Replies: 19
Views: 1804

Re: "Black pill" board?

I believe I may have found the schematic for the black pill. If so it can be added to the wiki. My boards are on order, so I can't verify that this is the right drawing. The 1.5k USB resistor is shown on the schematic as R7. Schematic is here.