Bo Qiang

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10 years, 7 months ago.

mbed reset itself after analog output

Hi,

I have a strange problem with analog output: whenever a waveform is played via the analog output pin, mbed reset itself. Does anyone see the same problem? work around? Thanks!!!

2 Answers

Wim Huiskamp
10 years, 7 months ago.

Is anything connected to analogout? Perhaps there is a feedback loop or short to the reset pin. Other issue may be that you overload the 5V or 3V3 outputs when analogout drives an amplifier or something else. The overloaded powersupply will lead to a voltage drop causing a reset.

Accepted Answer
Bo Qiang
poster
10 years, 7 months ago.

yeah, the mbed is driving an amplifier. Will supplying power through the Vin help ease that?

After some searches, I found this one:

http://mbed.org/users/4180_1/notebook/using-a-speaker-for-audio-output/

I think I am going to try the voltage devider option.