Yes, I started using a dedicated Shmitt trigger chip (74HC14N) after a LPF with fc = ~500 Hz, and it rails better than my comparator circuit. Here is my new signal, which goes from 0V to 2.06V:
7830...
Type: Posts; User: trent
Yes, I started using a dedicated Shmitt trigger chip (74HC14N) after a LPF with fc = ~500 Hz, and it rails better than my comparator circuit. Here is my new signal, which goes from 0V to 2.06V:
7830...
Thanks, I'm gonna try both of these things and report back.
I'm trying to use the FreqMeasure library to measure the shaft speed of a motor, and received a bit of help from the forum earlier pertaining to the circuitry necessary to get a good, clean digital...
Good idea, here's what it outputted (in my circuit with amplification but no filtration):
7512
7513
(about 16Hz for the first, 32 Hz for the second). This is the signal that's feeding...
quick question Ben (or anyone else), what's the advantage of using an IC Schmitt trigger versus an opamp (EDIT: or dedicated comparator) circuit like this one?
7511
Ben--this is really helpful! I'm already using an LM358 to amplify my signal. Thanks for speccing a Schmitt trigger for me--I'm hoping that it might help my current random-/over-sampling problem a...
Thanks guys, especially for the quick reply! I went with 9x amplification to give me around 2V "high", 0.2V "low" and FreqMeasure picks it up!
And thanks for the library, Paul. I think writing my...
I am trying to create an optical tachometer using a QRB1114 IR reflectance sensor, a Teensy 3.1, and the FreqMeasure library to count the rotations of a spindle that has reflective tape on it between...
Hey hytron, you might want to try out F Malpartida's LiquidCrystal library (V1.2.1 worked with my LCM1602). I was having compiler issues with NewLiquidCrystal, so I followed this guide, except I used...
Got it working. Btmcmahan's T3SPI example worked well without having to designate these pin modes. Turns out the problems were more down-to-earth (literally): grounding issues with my network...
So if I want pin 10 to be controlled by SPI, I do something like
CORE_PIN10_CONFIG = 3;
in setup?
Rookie mistake in not checking my speed. It was at 24 MHz.
Now I've got it set to SPI_CLOCK_DIV8, and I can read it on my network analyzer. However, my CS0 pin (which I assume is pin 10) is not...
I'm trying to use Teensy 3.0's both as a master and a slave in an SPI setup. However, trying to use the example sketches provided with the library, I haven't been successful at getting the Teensy to...