Most recent activity
-
my record with ULN2803's in my pinball machines is ah...
lets just say I'm glad I put in a socket.Interesting. What kind of parts do you drive with the ULN2803?
-
JumJum,
Here you can find a tutorial using an infrared remote control with espruino.
And here is an interesting document from Vishay about the basics of infrared communication. -
Hello Gordon,
Only problem is it has a standard non-rechargeable lithium cell and the solar panel isn't actually connected!
:-)
I've got some solar cells from this german ebay store. With this one I have powered an Atmega and a LCD. But it works only outside. A Lamp or sun shining through a window doesn't provide enough power. The 5V / 100mA of the cell is only reached with direct solar irradiation.
I think the modules are from china and should be available in the UK, too.
Btw: My espruino has arrived today (January 29) in Germany
-
Maybe you could try the next nightly (I only just committed the change) and see if that fixes the problem?
Yes, the problem is fixed. I've tested C9, A8, B13, E13, E14 and they all provide the selected frequency of 20 Hz.
Many thanks!
-
Hello,
I forgot to mention the source of wisdom :-)- Page 77, Table 12. Current characteristics
- Page, 83, Table 20. Typical and maximum current consumption in Run mode, code with data processing running from Flash memory (ART accelerator enabled) or RAM
- Page 84, Table 21. Typical and maximum current consumption in Run mode, code with data processing running from Flash memory (ART accelerator disabled)
- Page 77, Table 12. Current characteristics
-
Hello Gordon,
I have some questions about the sink/source capabilities of the STM32 chips.
The datasheet of the stm32f4xx specifies a sink/source current of 25 mA per pin. The maximum current consumption of the chip is rated with 150 mA. The stm32 itself consumpts from 87 to 109 mA (external clock, all peripherals enabled, f = 168 MHZ, T ambient = 25 to 85 C).
If I understand correctly I could connect for example two LEDs (I led = 20 mA) directly to the STM32 because 150 mA (I max) - 109 (I stm) = 41 mA.
Am I right?
@DrAzzy: The nrf draws less than 15mA (0 dBm TX power, 2 Mbps air data rate).
@conor: Thanks for sharing your code. I succesfully got two espruino boards talking together. Now I try it with arduino and espruino.