# Tag Info

## New answers tagged current-limiting

1 vote

### Detecting 16 V AC with a GPIO

Thanks to the many helpful answers, I've learned a lot about the properties of this problem space. It seems like my main problem is that even if I found a "neutral" pole on the incoming AC, ...
• 155

### Detecting 16 V AC with a GPIO

Several answers have mentioned optocouplers but they have not mentioned that there are AC input optocouplers that have back to back LEDs, for example this one. With these the phototransistor is ...
• 21.9k

### Detecting 16 V AC with a GPIO

Safest way is to use an optoisolator. Here is a method, showing the response time to a brief buzz of the bell. The 4 diodes can be a packaged bridge rectifier of just about any kind with an adequate ...
• 392k
Accepted

### Detecting 16 V AC with a GPIO

You fail to describe the nature of the AC signal, other than its amplitude, and even that is ambiguous. Is that RMS or peak voltage? This source has two terminals, and all we know about it is that one ...
• 32.2k

### Detecting 16 V AC with a GPIO

Your circuit makes a very little sense. One solid/safe way is to use a standard optocoupler (like old 4N25X or VO615A, page4 ) A 10k series resistor and extra diode on input (in parallel, in opposite ...
• 39.9k
1 vote

### Force equal current between 2 pins

I could use this connector to pass 2*5A=10A Yeah, at room ambient air temperature, in other words: it's a fantasy. With a 5A/pin connector, you'll need at least 4 pins to share the 10A load. More ...

### Force equal current between 2 pins

A little ballast resistance in each path will help share current equally between them. First look at the current imbalance without ballast: simulate this circuit – Schematic created using ...
• 32.2k

### Force equal current between 2 pins

Made with microcap v12. Here is a circuit that "could" do what is needed. This works with "balanced" inputs. Do the same "work" for the negative pins of the board. It ...
• 12.6k
1 vote

### Programmable current-limit on mains

Sounds like you need an AC benchtop power supply. Something like this is what you need: https://www.chromausa.com/product/low-power-programmable-ac-source-61600/ ADDITION As a starting point (I'm not ...
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