Hi stuff...
I have next project todo for my turntable. Currently based on vintage regular speed controller, I have using correction with stroboscope based solution as it was defined by vintage TT.
In my point I could use some Arduino (as example Nano) to correct speed of TT automatically based on sensor to calculate number of silver (white) and black dots of strobe.
I have found ky-033 model that could be used to detect white/black lines and working with multiple Arduino boards.
As all could see on picture - the size of sensors is not so small, but dot's on my TT is about 2-3 mm each other.
So my question is:
In case this module is simple and not enough, may someone knows some other module with required spec's as detection of 2-3mm lines (dots) and with possibility to detect up to 4-5 thousand dot's per minute.
Thanks,
Alex
I have next project todo for my turntable. Currently based on vintage regular speed controller, I have using correction with stroboscope based solution as it was defined by vintage TT.
In my point I could use some Arduino (as example Nano) to correct speed of TT automatically based on sensor to calculate number of silver (white) and black dots of strobe.
I have found ky-033 model that could be used to detect white/black lines and working with multiple Arduino boards.
As all could see on picture - the size of sensors is not so small, but dot's on my TT is about 2-3 mm each other.
So my question is:
- do someone knows limit about detected black/white lines by this module (it has minimum distance about 1sm from the line) but I never seen limitation of line size.
- need to understand the speed limit of detection (as I see this is about 100 white and 100 black dots on the 1 loop). So with 33.3 / 45 of TT speed we will have 3300 * 2 minimum detection in 60 seconds. Does this module could support this speed of detection.
In case this module is simple and not enough, may someone knows some other module with required spec's as detection of 2-3mm lines (dots) and with possibility to detect up to 4-5 thousand dot's per minute.
Thanks,
Alex
Hi. You can determine maximum speed easily. Just use square wave oscilator, feed bright led from it through a resistor ,and put led close to photo detector sensor. Connect a scope to output and watch waveform , increase frequency until waveform stops.
Again - I'm asking to be sure that is what I need. Not how I can check.
Guy's - this is forum of DIY and my question to peoples that has done some similar task, not about theory.
Thanks.
Guy's - this is forum of DIY and my question to peoples that has done some similar task, not about theory.
Thanks.
Hm… From this point can I ask you how old are you?
Because I don't have a time to explain that forum exactly for questions to check if somebody has same task done. So your first question has answer in the base of description what is the forum.
For second question answer could be found in simple dictionary.
Sorry, but I don't have a time to explain simple things.
I don't have an experience with this sensor. But theory of basic optics tells me:
1. Practically impossible to detect white-black lines that spaced less than distance between IR Photdiode & IR LED.
The question is about Noise-Signal Ratio, to get maximum, light has to be narrowed down to single elements, collimator is right words if I'm not mistaken.
2. Second question is again related to SNR. IR Photodiode pretty fast devices, 100k-1MHz is about limits, so it greatly depends on energy it's received.
1. Practically impossible to detect white-black lines that spaced less than distance between IR Photdiode & IR LED.
The question is about Noise-Signal Ratio, to get maximum, light has to be narrowed down to single elements, collimator is right words if I'm not mistaken.
2. Second question is again related to SNR. IR Photodiode pretty fast devices, 100k-1MHz is about limits, so it greatly depends on energy it's received.
Sorry op for offtopic, but how much expensive this module is?
I see another practical problem using it. Ambient , room light , sunlight, other infrared emiting devices. Need to make small enclosure for this module ,to protect it from entering any external light. Similar sensors are commonly found in printers , looking like two 3mm leds ,soldered on pcb, you may get one and experiment with it first. If receiving sensor part is phototransistor like inside optocouplers, it's speed depends on load resistor. If photodiode ,it needs additional amplifier or comparator, but should be faster.
I see another practical problem using it. Ambient , room light , sunlight, other infrared emiting devices. Need to make small enclosure for this module ,to protect it from entering any external light. Similar sensors are commonly found in printers , looking like two 3mm leds ,soldered on pcb, you may get one and experiment with it first. If receiving sensor part is phototransistor like inside optocouplers, it's speed depends on load resistor. If photodiode ,it needs additional amplifier or comparator, but should be faster.
About £2 on Ebay.
He doesn't want to. He wants the answer without the effort.
See post #7.
Amazing.
Seems you have free time to speak about what you don't know and do nothing.
