Split core current transformer (0-20A)

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Seller: Top-Rated Seller monkfish456 (1,784) 100%, Location: Derby, Ships to: GB, Item: 132416731696 You are bidding on a non-invasive split core current transformer with a 3.5mm output plug. Suitable for both AC and DC electrics, this unit clamps around the LIVE cable to provide a current reading from 0 to 20 amps. This particular current transformer sends back a voltage signal from 0-1V to signify the amount of current, where 1V = 20A. For more information about this product, visit the manufacturers website at http://www.yhdc.com/en/product/320/. The part number for this particular unit is SCT-013-020. This current transformer can be used for all sorts of projects. It is easy to interface with the Arduino – just connect it to an analogue input and earth and read the voltage to ascertain the current. For DC, this is a very simple measurement. For AC, you need a slightly more complicated script in order to sample the current multiple times and then take the peak readings over a handful of cycles to identify the current. Here is a short extract of Arduino code that does this for you: int GetWattage() { int currentReading = 0; int bottomReading = 1023; int topReading = 0; float average = 0; uint32_t start_time = millis(); while ((millis() - start_time) < 1300) // One and a third seconds { currentReading = analogRead(CURRENTSENSOR); // Change CURRENTSENSOR to the analogue port you are using if (millis() - start_time > 50) // You sometimes get fluctuations in the first few readings, so we ignore them. { if (currentReading > topReading) topReading = currentReading; if (currentReading < bottomReading) bottomReading = currentReading; } average += currentReading; } float range = topReading - bottomReading; float watts = (range / 203) * 3900; int returnWatts = watts; return returnWatts; } Condition: New, Brand: Current, Current Rating: 20A, Nominal Current Rating: 20 A

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