Search found 7465 matches

by RogerClark
Thu Dec 14, 2017 11:13 am
Forum: Off topic
Topic: DS212 Open Source Oscilloscope.
Replies: 8
Views: 52

Re: DS212 Open Source Oscilloscope.

Btw. In tha video the analog input seems to be done with a 4053

http://www.ti.com/product/CD4053B

They are quite cheap
by RogerClark
Thu Dec 14, 2017 11:07 am
Forum: Off topic
Topic: DS212 Open Source Oscilloscope.
Replies: 8
Views: 52

Re: DS212 Open Source Oscilloscope.

Andy,

the eBay link asks me to sign in...
by RogerClark
Thu Dec 14, 2017 9:54 am
Forum: Problems with libraries
Topic: Multiple I2C libraries
Replies: 7
Views: 67

Re: Multiple I2C libraries

Sounds like the code may be crashing before setup() is called.

This is commonly caused by the constructors in libraries attempting to use GPIO or I2c or SPI etc before its initialised.
by RogerClark
Thu Dec 14, 2017 9:52 am
Forum: Off topic
Topic: DS212 Open Source Oscilloscope.
Replies: 8
Views: 52

Re: DS212 Open Source Oscilloscope.

You can build a Pig-O-Scope for $10, I think thats much more fun and almost as practical as a test tool !
by RogerClark
Thu Dec 14, 2017 8:57 am
Forum: Off topic
Topic: DS212 Open Source Oscilloscope.
Replies: 8
Views: 52

Re: DS212 Open Source Oscilloscope.

It looks nice, but... For that price (looks like its over $100 USD on eBay), you can probably get a much better USB oscilloscope to hook up to a PC It claims 10M samples per sec, so that's at best a 5Mhz bandwidth. I can appreciate that its handy to have a portable oscilloscope, but there are multim...
by RogerClark
Thu Dec 14, 2017 3:38 am
Forum: Working / ported libraries
Topic: USB HID / USB MIDI as libraries
Replies: 51
Views: 560

Re: USB HID / USB MIDI as libraries

No worries

If someone else wants it, they can add it
by RogerClark
Wed Dec 13, 2017 10:45 pm
Forum: Working / ported libraries
Topic: USB HID / USB MIDI as libraries
Replies: 51
Views: 560

Re: USB HID / USB MIDI as libraries

Just a thought, but I noticed someone asking about USB Mass storage...

I recall there was some old code from the leaflabs forum, which I tried a long time ago.

I presume that in theory we could add USB mass storage as a library ???
by RogerClark
Wed Dec 13, 2017 7:23 pm
Forum: General discussion
Topic: usb host contr stm32
Replies: 8
Views: 105

Re: usb host contr stm32

I recall messing around with some “mass storage” code well over a year ago, and I susoect I posted to the forum about it. There are significant efforts going on at the moment to support USB HID and I susoect that USB mass storage could be added once the HID code is stable. However at the moment I do...
by RogerClark
Wed Dec 13, 2017 7:12 pm
Forum: Projects
Topic: Open Energy Monitor
Replies: 64
Views: 8910

Re: Open Energy Monitor

Use software Serial on the ESP8266 on some other pins
by RogerClark
Wed Dec 13, 2017 7:09 pm
Forum: General discussion
Topic: GOing mad trying to sort out sleep mode on STM32F103 Bluepill board
Replies: 12
Views: 197

Re: GOing mad trying to sort out sleep mode on STM32F103 Bluepill board

As the IDE sends the command to reboot ( into the bootloader) via serial USB, if you call Serial.end() It will most likely remove the ability for the core to receive the reboot command. The core secretly calls Serial.begin() as part of the core init, to enable this feature. I have not tested the PR ...