Hi all. I have a simple but pussling question.
I have 2 leds. Blue and green. I also have a capacitive sensor with 3 pins. 5vcc, gnd and sensor(gives out a high) The blue led must always be on. When I touch the sensor the blue led must switch off and the green led must switch on. When I do not touch the sensor, the green must switch off and the blue must switch on.

I do not want to use relays and it must be as simple as possible. How can I do this.

Thank you

 

Assuming the sensor goes low when off, this should work. The resistors depend on the LED's.

 

What voltages do you get from the sensor - high and low?

 

Assuming the sensor goes low when off, this should work. The resistors depend on the LED's.

Providing the sensor can sink enough current for the LED and its high voltage is high enough to switch on the FET.

 

Very true. A part number would be handy here.

 

High 5v low 0v.

 

Hi all. This is the sensor that I am using. https://www.mantech.co.za/ProductInfo.aspx?Item=15M1908

 

This chip will sink 8mA so the circuit above should work if the LED resistors are at least 375Ω.

 

This chip will sink 8mA so the circuit above should work if the LED resistors are at least 375Ω.

Thank you. I will give it a try and let you know. Greatly appreciate it

 

I'm looking to do something similar with LEDs that have a 12v 0.03a draw and I am open to using a relay. I am hoping to get a diagram together to get a PCB prototype and get a sample made with a Hals sensor and a magnet as a go/no go for a handle. Like a red/green stop light setup. Flipflop or something?