Search found 83 matches

by fredbox
Sun Mar 05, 2017 5:18 pm
Forum: Projects
Topic: In car multigauge
Replies: 135
Views: 2753

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: 1588

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: 1250

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: 363

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: 14
Views: 1432

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: 444

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: 500

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: 14
Views: 1432

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.
by fredbox
Wed Dec 28, 2016 3:47 am
Forum: Projects
Topic: $10 O-Scope revisited
Replies: 660
Views: 41534

Re: $10 O-Scope revisited

The reassignment of serial ports has never made much sense to me. I believe that Serial1 should always point to the UART1 pins. I usually define my own serial port: #define mySerial Serial1 Then in setup and loop, use the new definition. void setup() { mySerial.begin(9600); } void loop() { mySerial....
by fredbox
Sat Dec 24, 2016 4:23 am
Forum: General discussion
Topic: Overactive interrupt triggering using internal pullups
Replies: 22
Views: 628

Re: Overactive interrupt triggering using internal pullups

RogerClark wrote:
Basically, I'm doing the same as Nick Gammon describes here

http://www.gammon.com.au/forum/?id=11130

Image


That post on gammon.com.au was updated today with new code that uses pin change interrupts for four encoders.

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