Hey all
Ive been trying to design a simple MUX circuit for my project.
My circuit ia built from a controller (arduino), which controls two 2:1 MUXs (74lvc1g157). The output of each mux is connected to a multimeter, and the inputs are connected two different loads, meaning I0 for mux 1 and I0 for mux 2 are connected to Resistor 1, and I1 for mux 1 and I1 for mux 2 are connected to resistor 2.
I controll both Mux via the same arduino digital pin.
I want to switch the measuring between both loads. Muxs receive gnd and vcc from arduino.
So I always get 20ohm resistance, even if I remove the loads from the muxs inputs. When I remove the vcc from the voltage, the multimeter doea show overload (when no load is on the muxs).
I dont understand whats wrong. Should have I used demux instead ?
Why does the multimeter show this resistance ? Please help
Ive been trying to design a simple MUX circuit for my project.
My circuit ia built from a controller (arduino), which controls two 2:1 MUXs (74lvc1g157). The output of each mux is connected to a multimeter, and the inputs are connected two different loads, meaning I0 for mux 1 and I0 for mux 2 are connected to Resistor 1, and I1 for mux 1 and I1 for mux 2 are connected to resistor 2.
I controll both Mux via the same arduino digital pin.
I want to switch the measuring between both loads. Muxs receive gnd and vcc from arduino.
So I always get 20ohm resistance, even if I remove the loads from the muxs inputs. When I remove the vcc from the voltage, the multimeter doea show overload (when no load is on the muxs).
I dont understand whats wrong. Should have I used demux instead ?
Why does the multimeter show this resistance ? Please help