Yes (but you probably want different pullups).aswin0 wrote:...I need the sensor, and some circuit that provides 3.3V. That's all, right?
To get 3.3V I need a LDO voltage regulator and 2 capacitors (i.e. LD-1117 + 100nF + 10muF). That's all, right?
What about pull ups, do I need those?...
mattallen37 wrote:On a battery run line, probably no caps would be REQUIRED, but I would still use at least one.
Yes. The board has them, but as Andy said, they are probably way too strong. I would remove them and add normal resistors (not surface mount) for pullups. The NXT sensors use 82k, but I have used 100k, and NXTreme has used 10k, on a 4.nV line, with no problems.
nxtreme wrote:Actually, most if not all LDO regulators are switching regulators which means that they introduce spikes or noise into your power rails. You have to include caps otherwise the operation of your circuit will be spotty at best.
philoo wrote:NO! LDOs are plain, linear, noiseless (compared to switching regulator) devices. Capacitors are nonetheless required (values depending on circuit, see datasheet) to ensure stability. Without appropriate caps they turn into oscillators...
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