I have uploaded a video of a noise source i bought off ebay and the Red Pitaya spectrum analyzer being used to see the shape of filters.
A while ago i got it in my mind to start making youtubes of some of my projects as I build them. Slowly i have been gathering the bits I need to be able to do this, nothing fancy but things like a Mic for doing voice overs and a webcam that can do HD video are certainly helpful.
So today i got into the next step of the process and that is to clean the heck up around here and make things both clean and tidy as well as accessible. So the bench as been given a make over, with the radio gear all at one end and the test and building gear at the other end. I have another green cutting mat coming so keeping things clean and tidy into the future should be kind of easy from now on.
I still have a bunch of stuff to sort out and put in its rightful place, but another week and I might be done LOL
My old breadboard was starting to get a little tired so I thought it was time to update it and to something more useable. The old one was homebrew more or less, but how it was being powered was becoming a nightmare to use.So i grabbed one of these of ebay, and with a breadboard power module i have 12v 5v and 3.3v as well as USB power out. All in all this will be much more usable than the old board.
For a long time i have been using a website that allowed me to tailor a homepage with all the links and RSS feeds from news and other sites so i did not have to go searching all the time for the things I typically do. It was ad supported and I noticed tonight that they are spitting the dummy because I am using an ad blocker.
So it is only a matter of time before they shut me down entirely and I am forced to subscribe or have ads placed all over my landing page. So, after weighing up the options, I decided it was time to roll my own. I have tried this a few times and never have been happy with the results, but, I am now making progress and while it is not as nice as the other site I was using, my roll your own is looking much better and I think I can see myself being happy with the outcome.
Now I am no guru when it comes to databases and sql query language, but I have today managed to work out how to login to my database using MySql Workbench, select my database and table and query the weather station data to pull out the Max and Min values for each day.
Boy is this much easier to do than how I was doing it in a spreadsheet, the spreadsheet was a nightmare to setup and if one thing went wrong anywhere things would go bonkers and be out of whack. So now, I can pull out the data I want, cut and paste it into a database and create the charts I want and its going to take me next to no time at all now.
Who says you cannot teach an old dog new tricks Onward and Upward, is better than my condolences on the death of your chicken. LOL
The 4th project, while no where near complete is a capacitance touch iambic keyer. Well, its not really a project but a proof of concept, and it kind of works ok and is going to be something that i develop more as i have time. The micro is an ESP32 which has 10 capacitance touch sensors built in. I used a modified version the the morse library that’s available on the net for the timing and keying and connected a peizo buzzer to act as side tone. To key a radio all you have to do is set a digital pin high and pull it low when you want to key the transmitter. And as the code takes care of the timing, you could use this on any transmitter that uses a straight key and pulls to ground on keying. Most of them LOL.
Easter has been quite productive for me, this is project 3 out of 4 is rechargeable battery powered arduino clock with temp and humidity function. Nothing fancy, but highly practical and accurate. The code is a mess, but i have shared it down below, i know someone out there can clean it up and make it more efficient, but for now, its working and doing what it needs so, show the temp and the time.
Hardware is kind of inefficient for this task, arduino mega and 3.2″lcd are both overkill and power hungry. There is an RTC and temp humidity sensor, 18650 battery, boost and charge controller. As usual i did a really crap job at cutting the hole out, I really should have done this in the CNC, I might even make a how to video on how i do that later today.
#define DHTPIN A0
#define DHTTYPE DHT22
TFT_HX8357 tft = TFT_HX8357();
DHT dht(DHTPIN, DHTTYPE);
const long interval = 60000;
unsigned long previousMillis = 0;
bool Century = false;
unsigned long currentMillis = millis(); //Do stuff here every 60 seconds
if (currentMillis - previousMillis >= interval)
previousMillis = currentMillis;
tft.setCursor(10, 10, 1);
if (L_Date < 10)
if (L_Month < 10)
tft.setCursor(30, 100, 7);
if (L_Hour < 10)
if (L_Minute < 10)
tft.setCursor(20, 280, 4);
tft.setCursor(260, 280, 4);
humid = dht.readHumidity();
temp = dht.readTemperature();
L_Hour = Clock.getHour(h12, PM);
L_Minute = Clock.getMinute();
AmPm = "pm";
AmPm = "am";
L_Date = Clock.getDate();
L_Month = Clock.getMonth(Century);
L_Year = Clock.getYear();
L_Year += 2000;
DAW = Clock.getDoW();
DayOfWeek = "Sunday";
DayOfWeek = "Monday";
DayOfWeek = "Tuesday";
DayOfWeek = "Wednesday";
DayOfWeek = "Thursday";
DayOfWeek = "Friday";
DayOfWeek = "Saturday";
DayOfWeek = "ERROR";