Design Analysis: 4-channel level shifter
In a previous article
, I talked about how a bidirectional mosfet level shifter works. I built a 4-channel model.
Now let's see how it actually performed.
Recall the circuit for one channel:
First up: does it do its basic task? To find out, I used a pair of power supplies set to 5V and 3V, and a multimeter. Did it work?
You bet it did.
Second: was the form factor acceptable? Yep, it's small but easy to use on a breadboard, and fits perfectly in the middle. Did it draw too much power? Not for my uses. Was it cheap? You bet!
You can order the PCB from OSH Park here
, and buy the rest of the components from Digikey. (The transistor is BSS138CT-ND, the resistors are RMCF0805JT10K0CT-ND, and I'm sure you can find your own male headers.)
I'll post the design files up on git later, but for now, here's what the schematic and board looked like:
February 27, 2014