ESP8266 Community Forum

- Thu Jun 25, 2015 10:48 am #21627 Actually, I have never kept it on long enough (since the flashing lights feels like something is definitely wrong) to see if it is heating up.

I check the connections and polarity again. They seem correct, unless my assumption about the jumpers on the power supply is wrong. But I do not have a multimeter to check the voltage being supplied.

I think this was a good catch (thanks!). I'll see how I can verify the voltage (may be, Arduino's ADC?)

I also wanted to add that the power supply LED goes off (see attached video) when I connect the CH_PD pin to Vcc, which I assume is because it is unable to supply or is getting short-circuited

Thanks for your attention guys!!

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- Thu Jun 25, 2015 11:33 am #21632 I think that now is the ideal time to go out and buy a multimeter ... I don't think any off us can get far in our electronics hobby without having one. As well as measuring the voltage output of the MB-102 (that's what I use too), have a look to see what size of current is being drawn. I think some facts like that will help too.

If we still don't make great progress, we will probably want to see if the wiring is correct. Maybe draw up a detailed schematic of what you wanted to achieve and then add some detailed photos of what you actually built ... maybe a fresh pair of eyes might spot something.

Free ESP8266 book available for download here.

- Thu Jun 25, 2015 12:39 pm #21642

Actually, I have never kept it on long enough (since the flashing lights feels like something is definitely wrong) to see if it is heating up.

I check the connections and polarity again. They seem correct, unless my assumption about the jumpers on the power supply is wrong. But I do not have a multimeter to check the voltage being supplied.

I think this was a good catch (thanks!). I'll see how I can verify the voltage (may be, Arduino's ADC?)

I also wanted to add that the power supply LED goes off (see attached video) when I connect the CH_PD pin to Vcc, which I assume is because it is unable to supply or is getting short-circuited

Thanks for your attention guys!!

It's not clear from your picture what all you have connected to what.
But I would try this. ONLY connect to ESP8266:
3.3v
Gnd
CH_PD (3.3v)
Disconnect all others.

Does it still "cycle" the ESP8266 and the power supply?

What if you use 2 AA or C batteries instead of the power supply? Same result?

Ditto on "you need a voltmeter"

John

- Thu Jun 25, 2015 1:48 pm #21653 You DO need a voltmeter, doesn't need to be a uber fancy Fluke. I had to replace the regulators on two ebay MB-102's before I realized they were very sensitive to input voltage. I had an old supply labeled as 9V that actually put out about 16V, that was enough to fry the regulators.