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by zoomx
Thu Jan 12, 2017 8:46 am
Forum: Projects
Topic: Neopixel christmas lights
Replies: 17
Views: 256

Re: Neopixel christmas lights

Looking on the AliExpress listings, its hard to be sure which driver IC they are using. I believe that if the power source is rated as 5V they sell the B version. Maybe the older version is not selled any more or is difficult to find. But there is still a possibility so we have to check the power v...
by zoomx
Wed Jan 11, 2017 10:44 am
Forum: Projects
Topic: Neopixel christmas lights
Replies: 17
Views: 256

Re: Neopixel christmas lights

Also, not sure if it's mentioned on this forum already, but neopixels actually need about 3.7-3.8V to fully turn on all colors. Above that voltage you don't see any difference. The rest is just dissipated as heat by the voltage control on the pixel. :shock: Never heard about this. The Adafuit PDF D...
by zoomx
Mon Jan 09, 2017 2:10 pm
Forum: Projects
Topic: Neopixel christmas lights
Replies: 17
Views: 256

Re: Neopixel christmas lights

racemaniac.mooo.com unreachable........
maybe a DDNS problem?
by zoomx
Tue Dec 20, 2016 9:47 am
Forum: Off topic
Topic: A 4$, 4ICs, Z80 homemade computer on breadboard: Z80-MBC (Mobile Breadbord Computer)
Replies: 22
Views: 399

Re: A 4$, 4ICs, Z80 homemade computer on breadboard: Z80-MBC (Mobile Breadbord Computer)

I got ZX81, ZX Spectrum, Atari 520 but no C was available for it at that time (80ties) as far as I can remember. It could be done in asm too, but lot of effort required :roll: No C only asm, but it was not very difficult for 6502 family since there are few instructions. Today I don't remember none ...
by zoomx
Mon Dec 19, 2016 9:27 am
Forum: Code snipplets
Topic: printing hexadecimal i recall a +6 in it
Replies: 8
Views: 163

Re: printing hexadecimal i recall a +6 in it

zmemw16 wrote:40yrs makes it 1976, for me it was one or two years after the Shah of Iran went, parent got evac'd to Greece, then Malta
2 suitcase max and a hercules.
stephen

Maybe before, not after. The Shah of Iran went on january 1979.
by zoomx
Mon Dec 19, 2016 9:12 am
Forum: Generic STM32F103
Topic: Blue pill PC13 shorted to ground
Replies: 17
Views: 302

Re: Blue pill PC13 shorted to ground

I have the same USB scope with a weak mount. It has only 640x480. http://img.hisupplier.com/var/userImages/2011-09/11/134320608_50X_500X_USB_Handheld_Microscope_KLN_J500_240.jpg There is not any zoom, it moves only the plate with LED and CMOS sensor to get focus, you can see it easily removing the t...
by zoomx
Mon Dec 19, 2016 8:27 am
Forum: Off topic
Topic: A 4$, 4ICs, Z80 homemade computer on breadboard: Z80-MBC (Mobile Breadbord Computer)
Replies: 22
Views: 399

Re: A 4$, 4ICs, Z80 homemade computer on breadboard: Z80-MBC (Mobile Breadbord Computer)

RogerClark wrote:I recall the Sinclair computers (Z80) vs the BBC (6502), but I don't recall the BBC being any faster - but perhaps it was.

I recall Spectrum vs C64. I had a C64 and somewhere I still have a C128.
by zoomx
Tue Dec 13, 2016 9:36 am
Forum: Generic STM32F103
Topic: USB known device
Replies: 2
Views: 200

Re: USB known device

From http://wiki.stm32duino.com/index.php?title=Blue_Pill The USB standard require a 1.5k pullup resistor on D+, but this board is known to have a wrong value (R10 on the board). It ships with either a 10K resistor or a 4.7k resistor, but it should be replaced with a 1.5k resistor, or put an appropr...
by zoomx
Fri Dec 09, 2016 9:18 am
Forum: STM32F4 Boards
Topic: ENC28J60 on Netduino2Plus
Replies: 36
Views: 1884

Re: ENC28J60 on Netduino2Plus

I hope that I wil find time to check it!

Thanks!
by zoomx
Wed Dec 07, 2016 9:05 pm
Forum: Libary request
Topic: HX711 Lib?
Replies: 7
Views: 211

Re: HX711 Lib?

Never used this chip but this Arduino library
https://github.com/bogde/HX711/blob/master/HX711.cpp
seems simple to port to STM32.

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