Search found 171 matches

by jinhusong
February 7th, 2021, 5:01 pm
Forum: Boomilever B/C
Topic: Boomilever B/C
Replies: 65
Views: 4759

Re: Boomilever B/C

If the competition will use SkiCiv, please start to play with it as soon as possible. Treat it as a computer game and try to find out its laws. It does not follow physics laws exactly. Try all kind of possibilities, go extreme.
by jinhusong
March 16th, 2020, 12:59 pm
Forum: Detector Building C
Topic: 2020-2021 Detector
Replies: 21
Views: 5341

Re: 2020-2021 Detector

Just change regional to State rule.
by jinhusong
March 11th, 2020, 10:42 am
Forum: Detector Building C
Topic: ADC legality?
Replies: 3
Views: 746

Re: ADC legality?

I asked FAQ about external ADC, the answer was no, then changed to not very clear.

I will allow you to use the stm32 and external ADC if I run the event. But, please if possible, make the ES's life easier.
by jinhusong
March 10th, 2020, 7:13 pm
Forum: Detector Building C
Topic: ADC legality?
Replies: 3
Views: 746

Re: ADC legality?

If only 12bit, you can use Arduino DUE.
by jinhusong
March 9th, 2020, 10:26 am
Forum: Detector Building C
Topic: Detector Building C
Replies: 212
Views: 32438

Re: Detector Building C

Thanks for the link. I got your idea. Yes, the output of the reference resistor is way more linear with smaller reference resistance. Once they are linear, it is possible to get 0.1C, it needs 750 points and ADC has 1024 point. Maybe you can reduce the error at 0 degree by switching the ADC range? I...
by jinhusong
March 9th, 2020, 9:26 am
Forum: Detector Building C
Topic: Detector Building C
Replies: 212
Views: 32438

Re: Detector Building C

Show me your setup and calculation. What I did is for 10K reference + 10K thermistor. The 10 bit ADC only has 1024 different values (0-1023). 0-75 degree C to 0.1C, you will need 750 different values. With thermistor non-linear curve, it is very unlikely you can get 0.1C with 10 bits ADC. Still poss...
by jinhusong
March 5th, 2020, 9:37 am
Forum: Detector Building C
Topic: Detector Building C
Replies: 212
Views: 32438

Re: Detector Building C

I thought low battery would only impact a linear analog to digital sensor, not a thermistor? I tried switching batteries and the readings all remained the same. For reference, two weeks ago the device would read a voltage of 395 for 15 degrees, but now it reads a voltage of 380 for 15 degrees. Noth...
by jinhusong
March 4th, 2020, 9:40 pm
Forum: Detector Building C
Topic: Thermistor issue
Replies: 1
Views: 518

Re: Thermistor issue

Switch to thermistor is a safe way to go.

As long as your sensor is repeatable, you can calibrate with like 1 degree steps, then with interpolation between data points, you should be able to get good results.

The repeatability is the key. If it is not stable, just switch.
by jinhusong
March 4th, 2020, 9:20 am
Forum: Detector Building C
Topic: Detector Building C
Replies: 212
Views: 32438

Re: Detector Building C

I thought low battery would only impact a linear analog to digital sensor, not a thermistor? I tried switching batteries and the readings all remained the same. For reference, two weeks ago the device would read a voltage of 395 for 15 degrees, but now it reads a voltage of 380 for 15 degrees. Noth...
by jinhusong
March 4th, 2020, 9:06 am
Forum: Boomilever B/C
Topic: Boomilever B/C
Replies: 357
Views: 54718

Re: Boomilever B/C

BigBootyBason wrote:
March 4th, 2020, 7:42 am
if one were to use 1/16 x 1/16 bass for tension from a 24" stick. What weight would be ideal for a 24" stick
1/16 X 1/16 cannot hold while weight from our experience. Now we use 1/32X3/16. To be safe, I saw many people use 1/16 X 1/8 or 3/32 X 3/32.

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