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USB AVR Programmer with SLO-scope


#1

Hello.

I am pleased to introduce the new Pololu USB AVR Programmer.

The new Pololu USB AVR Programmer is smaller and cheaper than our old programmer, and it has two awesome bonus features:

[ul]
[li] A TTL-level serial port that is on a separate COM port. Now you can program your AVR and have it send serial bytes back to you without having to close AVR ISP or your terminal program.
[/li]
[li] A severely limited oscilloscope (SLO-scope). You can use this to measure voltages between 0 and ~5 V at either 10 kHz or 20 kHz. Here is a screenshot of the client for Windows:[/li][/ul]

Good night, all.

–David


Maestro to send pulses to a stepper driver
#2

Bonus Contest: Win one of these programmers by replying to this thread with the correct identification of what the signals are in the SLO-scope screenshot above!

–David


#3

That’s fantastically nice!

The signals look like stereo audio waveforms of someone talking or singing a cappella (silence during the natural pauses so it probably isn’t music). It looks like the frequency varies between about 120 and 240 Hz, which sounds reasonable for a voice. Unfortunately I can’t read waveform.

-Adam


#4

Nope!

- Jan


#5

is it an accelerometer on something that is vibrating?


#6

No, try again.

- Jan


#7

The quadrature outputs (analog) of a rotary encoder ?


#8

Nope, that’s not it!

- Ryan


#9

Someone saying “slo-scope”?


#10

No, it’s not any kind of audio capture.

- Jan


#11

Component video?


#12

Sorry, nope!

- Ryan


#13

thats probably the output from one of these pololu.com/catalog/product/1217


#14

Nope, sorry.

- Ryan


#15

A signal sensed by a hall-effect current sensor


#16

No, plus we probably wouldn’t consider that a complete answer since the question of what the hall sensor is sensing would still remain.

- Jan


#17

A gyroscope measuring pitch and roll perhaps?


#18

HI lumos,

Sorry, nope.

- Ryan


#19

I know this is an old thread, but was this ever answered? It looks like a signal from a reflective line following sensor???

Mike


#20

I guess it’s been long enough that we can end the contest. The signal is from the two phases of a stepper motor I was manually turning back and forth (one side of each coil was connected to around 2.5V so since the SLO-scope only has a range of 0-5V). Some characteristics that give it away are that the two signals are 90 degrees out of phase and that the amplitude is proportional to frequency. In the close-up, the phase difference changes from blue leading to blue lagging because the motor changed directions in the middle.

- Jan