Search found 7422 matches

by RogerClark
Mon Dec 11, 2017 11:04 am
Forum: General discussion
Topic: AC Dimmer
Replies: 8
Views: 19

Re: AC Dimmer

Ok. what you are are using is fine for a heater. BTW. I found the circuit I used http://mediaprocessor.websimages.com/width/979/crop/12,22,930x340/www.dextrel.net/DIY%20PICS/ZC-schema.gif http://dextrel.net/diyzerocrosser.htm I built a 5kW heater controller, custom PCB, But in the end I never used it.
by RogerClark
Mon Dec 11, 2017 10:48 am
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 471
Views: 7621

Re: F405 & F411 versions of the BluePill

Re: Jump to memory location

Yes. I think in theory it can be done. But I"ve read various posts on various forums where people seem to be having trouble doing that
by RogerClark
Mon Dec 11, 2017 10:47 am
Forum: General discussion
Topic: AC Dimmer
Replies: 8
Views: 19

Re: AC Dimmer

I forgot to say the mains frequency varies a bit, so you also need to calibrate for actual frequency.

However the electricity companies have to keep it pretty accurate as its uses for time keeping, so I didnt both with that
by RogerClark
Mon Dec 11, 2017 10:46 am
Forum: General discussion
Topic: AC Dimmer
Replies: 8
Views: 19

Re: AC Dimmer

I've done a lot of investigation into this, and you definitely can't replace the Zero Crossing detector... Its absolutely essential There are a few GotYa's with this stuff Firstly the basic zero crossing detector you are using,is very susceptible to mains noise, and its likely you will get a trigger...
by RogerClark
Mon Dec 11, 2017 6:43 am
Forum: New users MUST post here first, and let us know a bit about you and your projects
Topic: Hello from Southern Germany
Replies: 1
Views: 13

Re: Hello from Southern Germany

Hi Karin I have been experimenting with some LoRa modules, using the cheap BluePill STM32F103 board I find that LoRa library by Sandeep Mistry (on github) worked fine for the SX1278 modules, and I think the HopeRF modules have exactly the same interface so the same library should work for the Hope d...
by RogerClark
Mon Dec 11, 2017 6:38 am
Forum: New users MUST post here first, and let us know a bit about you and your projects
Topic: Hello from Russia
Replies: 1
Views: 20

Re: Hello from Russia

Welcome Aleksey

There are probably 6 or more people who are building systems for their cars or motorbikes.

So if you search the site, hopefully you will be able to find what they are doing.
by RogerClark
Mon Dec 11, 2017 6:36 am
Forum: Working / ported libraries
Topic: USB HID / USB MIDI as libraries
Replies: 28
Views: 337

Re: USB HID / USB MIDI as libraries

Re: Host To Host A few weeks ago, I did try to find if it was possible to send a command via HID, as its supposed to be bi-directional, but did not find anything useful There was a post on AVRFreaks where someone was using VUSB for HID and wanted to send commands to the AVR but he seemed to have a r...
by RogerClark
Mon Dec 11, 2017 6:34 am
Forum: Off topic
Topic: First experience review of allpcb, $5 for 100x100mm boards shipped
Replies: 16
Views: 381

Re: First experience review of allpcb, $5 for 100x100mm boards shipped

I checked again, yesterday and it appeared to be fully working again, but it sounds like their site is not well maintained.

(Which isnt surprising, as they must not be able to afford to spend much getting it maintained, when they are taking a loss on each $5 order)
by RogerClark
Mon Dec 11, 2017 6:32 am
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 471
Views: 7621

Re: F405 & F411 versions of the BluePill

I've tested DFU upload on one F4 board, and it seemed to work every time. I checked the board and it does not have a pulldown on PA9 or PA10 I also checked the STM32 Stamp schematic (there is a copy in my repo in the STM32F4Stamp folder) and that board does not have a pulldown on PA9 or PA10 (it can...