I have 14 pins on my microcontroller, any way for me to find out?

Does it have any writing on it?
That's really the only way to find out.

 

ebeowulf17, i don't get a moving trace that sweep from left to right. I only get a vertical fixed line per my last photo post. Only when i switch my Time/Dev to 0.2 that I see the trace move from left to right?



Do you know the number of the microcontroller. I have 14 pins on my microcontroller, any way for me to find out?

Thanks,

Hmmm, no moving trace tells me something in the triggering settings isn't right (right and wrong is all relative, but the triggering isn't what I would want anyway - there should be a way to get a full width sweep at that time division.) You might need to switch back from auto to norm, or it might be the "A Trig Holdoff." If you're just seeing one dot or vertical line at a time, that tells me that it's re-triggering frequently. Ideally you'd get it set so that it triggers at the first appropriate moment at the end of each sweep, but without re-triggering in the middle of a sweep. I'm able to do this on my old, cheap, half-broken, no-name analog scope, and also on my Rigol DSO, but I don't remember the exact settings right now. Danko can probably answer, as he is obviously more familiar with your scope.

As for the micro, I have no clue. I don't see any numbers on the chip, but that could be due to photo lighting. If you can read any markings on the chip, or get a clear photo of any markings, share the results here. Otherwise, it's hopeless. Even if you do find markings, it might be hopeless. Stuff like this is often made with proprietary, or at the very least re-branded private label, chips which means that numbers are meaningless unless you work for the manufacturer.

 

EDIT: That is a really nice third picture, by the way. Impressive. I reckon the 14-pin chip is a microprocessor, but can't work out what kind. Looks like +5V is on pin 4, and common (AC neutral) on pin 11. That should give a clue, but not found a match yet.

You are absolutely correct Hexreader: +5V on pin 4 and pin11 (AC neutral).
What i don't understand what is the need for pin 10.

If you can shed some light that would help a lot. Thanks you.

 

Hello,
The BT131 is a small triac.
See the datasheet for its connections.
Bertus

Hi Betus, I am looking at the datasheet but because i am a Noob i am not sure what i am looking at. I am trying to find out what is the min/max requirement is to open the BT131 transistor gate?
From my measurements it looks like the gate gets 5VCD when OFF and with a bit help at 5.35VCD gate opens and turns the pad ON.

 

My guess is that pin 10 samples the AC waveform. The Zener diode prevents the microprocessor pin going above 5 Volts or below 0V (well below -0.6V at least).

Detecting the zero-crossover point on the mains waveform allows the microprocessor to only turn the TRIAC on or off when power is at minimum. I think this gives cleaner switching with less RF noise and less power required to switch. .... but I am no expert...