HCPL-3700 AC/DC to Logic Interface Optocoupler April 2007 ©2005 Fairchild Semiconductor Corporation www.fairchildsemi.com HCPL-3700 Rev. 1.0.1 HCPL-3700 AC/DC to Logic Interface Optocoupler Features AC or DC input Programmable sense voltage Logic level compatibility Threshold guaranteed over temperature (0°C to 70°C). HCPL3700 – Optoisolator Darlington Output 2500Vrms 1 Channel 8-DIP from ON Semiconductor. Pricing and Availability on millions of electronic components from Digi-Key Electronics.
Submitted byuno4 years agó
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Project Concept How to identify 120V without tying an IO pin number to máins?
Name says it all but to offer more framework:
![Voltage Sensing Hcpl3700 Voltage Sensing Hcpl3700](http://s1.dtsheet.com/store/data/000571274_1-4e6a9fa341d9dfc48d5d7093295c7056.png)
I'meters searching at creating a strength failure alarm for my server stand at house. The concern is certainly that the stand is lower in the basément and I cán't hear the UPS sensors from the lifestyle room. On best of that, the cause for the frequent strength outages can be that some wizard made a decision to cable the house therefore that the dwelling room and the basement had been on the exact same circuit. All of thé basement plugs talk about strength with the dwelling room therefore taking breakers can be pretty typical. :( (Who believed of posting a 15A breaker amongst two rooms is usually a great idea is certainly beyond mé)
l has been interesting the concept of connecting up a fireplace security alarm strobe (like the types you find in an office developing) and an ACKNOWLEDGE key to it só I could shut it off while I mitigate the problem. I can operate a item of telephone cable connection between the strobe/ACK switch and the server stand in the basément.
Thé idea is that the Arduino will be driven off of thé UPS by á 12v/5V energy source I possess on hand as nicely as a 'detector' 120V range to figure out if the application power offers hit a brick wall. The issue can be how can I dependably identify the strength failing while preserving the spark-gap solitude from the 120V.
I've thought of constructing a 'poor-man'beds optoisolator' using a neon light bulb 1and a photoresistor inside of an opaque housing. The concept getting that if mains voltage can be dropped, the photoresistor senses the loss of lighting and triggers the Arduino to near relays connecting the strobe to a 12V energy source (from thé UPS). Thé ACK key would end up being a easy input connected to an IO pin to inform the Arduino to shut off the strobé.
1 Hyperlink: http://www.jaméco.com/1/1/751-sd-03-wire-terminal-neon-lamp-65-120vac-500ma.html
Offers anyone attempted this? What are usually your ideas? Can be there a much better way of doing it I should think about? Thank you for your help.