- a guy said to me that Hall sensors (such as the ones in the encoder) require 4.7K pull-up resistors . but for now everything seems to be working without those , should i add them anyway in my printed circuit design ?
Flippant answer to the original question: Power it from 7V, if it blows up its a 3.3V part, if it works its a5V part (probably a somewhat damaged 5V part, but hey).Slightly less flippant answer: Test a bunch of them at a range of voltages and plot the results. In otherwords do the work of characterizing the parts in detail.
One way to find out is to measure the DC voltage at one of the hall sensor output pins (relative to the gnd pin) for a case where the hall sensor supply voltage is 3.3V. As you rotate the disk, the voltage will probably switch from 0V to 3.3V or vice versa. Then do the same thing for a hall sensor supply voltage of 5V. If you get sensor output voltages that switch between 0V and 5V, then chances are that your hall sensor can work with either 3.3V or 5V. This means that you would be free to choose what voltage you want to operate with, by choosing your hall sensor supply voltage.Those pin-out sheets are at least helpful in that they tell you what the wires are, and provide some clues about voltage levels. Otherwise, it's a bit of fail on their part on providing adequate details. It's probably a fail on their suppliers. The other thing is ..... maybe you've thought about it already ---- such as what sort of measurements are planned for those encoders. Relatively constant angular velocity measurements?
Of course you realise that to do a real hand, you arguably need twin motors for each finger - the superficialis and profundus for each finger, not to mention the lumbricals and interossei. Cannot live long and prosper without.
the connectors will still snap correctly right ?
- the copper weight and the surface finish , i have no idea how to pick the right ones . i even tried searching online without any hope
my question is whether or not it can slide on the surface . because the connector is in the middle of the board and not on any of the edges .