Search found 214 matches

by dannyf
Wed Jan 24, 2018 2:56 am
Forum: General discussion
Topic: What can & can't it do?
Replies: 12
Views: 186

Re: What can & can't it do?

Your last question is hard to answer and I would argue not important. The beauty of Arduino is in it's simplicity. It assumes a uniform programming model by hiding away the details about the chip and it's peripherals. That works for new users and simple tasks. And that 99 percent of what a typical A...
by dannyf
Tue Jan 23, 2018 3:27 pm
Forum: Projects
Topic: Metal detector dc42 improvment
Replies: 9
Views: 255

Re: Metal detector dc42 improvment

cola can from distance 1m+
you can help yourself by setting realistic design goals and understanding how metal detection works on some metals like aluminum.
by dannyf
Tue Jan 23, 2018 1:05 pm
Forum: Projects
Topic: Metal detector dc42 improvment
Replies: 9
Views: 255

Re: Metal detector dc42 improvment

it depends on the range of detection desired. for me, this approach is too complicated: as it relies on the coupling between the two coils for detection. a simpler approach is to use the coil as part of an oscillator, whose frequency changes with the presence of metal (well, most metal) near the coi...
by dannyf
Tue Jan 23, 2018 12:56 pm
Forum: General discussion
Topic: Nextion
Replies: 17
Views: 3499

Re: Nextion

I stayed at a small hotel that seemed to have switched to using this method to heat water. it is a hybrid water heater: a heat pump + one electric heating element - most electric heaters have two heating elements. Its supposed to be more efficient than normal resistive heating. But of course the in...
by dannyf
Tue Jan 23, 2018 1:43 am
Forum: General discussion
Topic: stm32 based programmable power supply
Replies: 5
Views: 136

Re: stm32 based programmable power supply

that's an interesting idea. using two switches, one being the high-side, can be an expensive solution. I would use just SW2 (with a n-ch mosfet) and call it a day. BTW, such a charger can be done efficiently with a regular (switching mode) voltage regulator chip, with the battery (or LED) + a curren...
by dannyf
Mon Jan 22, 2018 3:37 pm
Forum: General discussion
Topic: What can & can't it do?
Replies: 12
Views: 186

Re: What can & can't it do?

The best effort approach is also why some flock to arduino-stm32. To me, I'm more interested in implementing Arduino on non-avr chips, as a hobby. So monetary rewards aren't a factor. In sure there are others as well.
by dannyf
Mon Jan 22, 2018 12:52 pm
Forum: General discussion
Topic: stm32 based programmable power supply
Replies: 5
Views: 136

Re: stm32 based programmable power supply

It is best to keep the negative feedback loop intact. That means that for a 3terminsl regulator, you simply inject a control voltage to the feedback node. The generation of that voltage can be open loop, or closed loop - the mcu can also sample the output to determine it's analog output. The output ...
by dannyf
Sun Jan 21, 2018 9:22 pm
Forum: General discussion
Topic: What can & can't it do?
Replies: 12
Views: 186

Re: What can & can't it do?

Are there any limitations using the Arduino approach? there are limitations to any approach, including "the ardiuno approach". I mean, are there peripherals, activities, interrupts, who knows, that you can only do with what I'll dare to call 'native' solutions? No and yes. No in that arduino is not...
by dannyf
Sun Jan 21, 2018 6:56 pm
Forum: General discussion
Topic: stm32 based programmable power supply
Replies: 5
Views: 136

Re: stm32 based programmable power supply

I have done a few of those experimental power supplies. Two things I learned: 1) it is very difficult to provide a good balance between dynamic performance vs. steady state over a wide range of voltage / current combos. getting the power supply to be stable without being slow is a big challenge. 2) ...
by dannyf
Sun Jan 21, 2018 12:08 am
Forum: IDE's
Topic: STM acquires Atollic
Replies: 26
Views: 869

Re: STM acquires Atollic

are older versions of Atollic still available for download?