Search found 5 matches

by Tage
Sat Apr 18, 2015 3:23 pm
Forum: Hardware Projects
Topic: Sun Tracker
Replies: 7
Views: 5534

Re: Sun Tracker

good advice, the short circuit current is proportional to the amount of sunlight that hits the panel. so the best way to measure is to connect a resistor to the wires and measure the voltage drop. if the panel is small you can just connect a number of 15 ohm "1/4W" resistors in parallel to get low e...
by Tage
Sat Jan 10, 2015 2:24 am
Forum: General Discussion and Questions
Topic: increase precission?
Replies: 2
Views: 1550

Re: increase precission?

my suggestion is to take 30 measurements, sort them from lowest to highest, throw away the ten lowest and the ten highest readings and average the remaining ten readings.
by Tage
Tue Nov 18, 2014 2:04 am
Forum: MicroPython pyboard
Topic: best non-permenant way to connect pyboard to breadboard?
Replies: 4
Views: 3638

Re: best non-permenant way to connect pyboard to breadboard?

I use pin headers soldered to the board, and jumpers male-female or female-female, like these (google LS-MFPJ-6). using solder connections is the most reliable way, and it is quite fast to cut stranded wire, remove a few mm of the insulation and solder the wire to the board (directly into a hole or ...
by Tage
Sat Sep 27, 2014 12:37 am
Forum: General Discussion and Questions
Topic: Question about Timer.callback(), lambdas and functions
Replies: 7
Views: 5309

Re: Question about Timer.callback(), lambdas and functions

thank you pythoncoder and dhylands, now the project is moving forward again. I got the frequency is smoothly controlled by turning the potentiometer. no dropped pulses as far as I can see, and relatively low jitter, the jitter is mostly due noise on the ADC I think. I will spend some time during the...
by Tage
Wed Sep 24, 2014 2:43 pm
Forum: General Discussion and Questions
Topic: Question about Timer.callback(), lambdas and functions
Replies: 7
Views: 5309

Re: Question about Timer.callback(), lambdas and functions

I am trying to figure out how to write simple program that can handle this task: -generate pulses at a certain frequency from a digital output -read an analog input (eg. the voltage from a potentiometer) -adjust the frequency of the output continuously according to the voltage reading (potentiometer...