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newRPL: [UPDATED April 27-2017] Firmware for testing available for download
04-12-2016, 08:10 AM
Post: #254
RE: newRPL: [UPDATED Mar-09-16] Firmware for testing available for download
(04-12-2016 02:41 AM)Claudio L. Wrote:  If the IO pins are not properly setup there can be currents when off, and that's something I need to investigate and correct. I didn't notice any problems on my 50g, batteries last quite long now that I have enabled auto-power off I'd say about the same as my other 50g with stock firmware.
10 mA is a lot of current, there might be something setup incorrectly, I just need to figure out what it is.
There's virtually no difference in hardware between a 50g and 49g+, except for an extra battery and the circuitry to power the calculator from the USB port. That's where I should start looking.

Just to confirm my readings (this time with a proper power supply and crocodile clips):
  • Current when power is first applied - 82.4 mA
  • Current when switched off: 4.2 mA
  • Current when switched on from the keyboard: 42.4 mA
  • Current when switched off again from the keyboard - 6.8 mA
Subsequent currents are all close to 42mA (on) and between 5mA and 10mA (off).

Nigel (UK)
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RE: newRPL: [UPDATED Mar-09-16] Firmware for testing available for download - Nigel (UK) - 04-12-2016 08:10 AM



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