I am designing an integrated circuit for light intensity measurement. I need to have a connection between two points when the electricity is not flowing through a particular point, but when electricity is flowing through that point I need it to be off.
I have found a solution with a thyristor, but I would like to know if there is an easier one I am overlooking.
AC? DC? How much voltage and amperage?
Maybe the "Normally Closed" contact on a relay?
To basic approaches: LDR or phototransistor.
This part requires you to ascertain the power demands (dissipation) and the working voltage. Transistors can easily work low-voltages but generally require large heatsinks if the power (Watts) is significant. The same is true of SCR and thyristors. Relays are inexpensive and can handle both high voltages and significant current.
If working with AC mains voltages or high-voltage DC, there are significant safety concerns - do not overlook these! In addition, some jurisdictions may require licensed professionals to connect to electrical systems: especially when property is at risk: homes and automobiles.
I forgot to clarify but in this circuit there are 9 resistors and 9 transistors. the 9 transistors are the gates for the number sequences. when the voltage increases the electricity can flow through the higher resistance resistors switching on the correct number sequence. However there is a problem I need the resistance terminals below the highest activated one to be switched of when their proceeding numbers are activated.
Less knowing the details as already mentioned my first suggestion would likely be a relay. That said details like current type, AC or DC, current load in amps and voltage play a big part in getting good advice. Also define what we mean by electricity is flowing?
Ron
I am trying to make the circuit as compact as possible
I also do not want 8 relays hinging out
There will be little for anyone to help you with if you keep dribbling out details or continue being vague.
Post the schematic of this 9 resistor 8 transistor thing.
Post any code you are using on the Arduino that is part of this endeavour.
And what do you mean by designing an IC?
a7
Never mind, I have given up on miniaturizing this circuit.
also I learned that there is already a measurement of light called lumens
I am very stupid
As with many "bright ideas" , mostly you will find it has been thought of previously and there is likely to be a commercial product already "out there".
Best to Google first, waste time later.
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