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I`m going to measure charge and discharge current of akumulator. Would you inform is it possible to use this sensor for bidirectional current measuring. Also the problem is to transfer this information to microcontroller ADC. I mean that I should transform +/- sygnal to unipolar and separately select a logical signal that will tell the controller about current polarity

R2 and R3 value?

Excellent clear explanation, my Aoyue 968 blew its fuse resistor, and it's element. I replaced both, then new element burned like a furnace and failed. Turned out to be a shorted Triac, replaced and tested with an old mains lightbulb, before replacing the element. Bulb flashes slowly, 2 to 4 times/sec.?, I expected mains freq. Pulses.

Why does it out 1.1v for me, diode is 1n4007

hello dear, i repaired handle wiring because of firing bta12-800, all good now in handle: resistance of heater, thermistor, hercon is working, cooler is working separately of station, but station says SLP always.... all transistors on board working, not fired component on vision, what wrong with it?

Please my rework station has an issues what should I do about it

👍👍👍

I built this configuration with an unknown core. I found the core I used had significant magnetic hysteresis which skewed the resulting analog value say 5% in the direction last traveled. I set up a 49E on a breadboard hooked to a meter without a core and took a voltage reading. I then placed my sample core near the sensor to establish a reference output. I then exposed the sample core to a strong magnet then back to the sensor. If the core retained a magnetic charge I rejected it. Rather crude but it worked for me to find a core which gave me repeatable readings. I ended up with a 50T 26ga outputting 1 to 4V directly to a Arduino. No preamp was needed. Scale was +- 1A. Zero location was 512+-2 counts in all my current testing.

Great video

Very cool topic. THANX

Thank you for this video! This is what I needed. No shouting, jumping, flashing. Everything is strictly to the point. Thank you!

I am a long time arduino programmer and I do understand local and global vars and passing paramaters, but I do have a question about declaring local variables in void main loop that are only used to be passed to functions. 1.Do you agree that by default the void main loop is really a "while loop" that runs forever ? 2. assuming #1 is correct, then any variables declared in void main loop will keep getting redefined every cycle the void main loop runs and possibly resets the variable value a function may have changed ? 3. Do you just define void main loop variables as really globals above "setup" and treat them as local in the void main loop ? 4. Or do you create a additional "while" loop in main loop ?

I would love more videos online showcasing old analog transceivers and examples of them locating another beacon. I was taught on modern digital beacons and its interesting to see how the technology has evolved.

What does happen decreasing source voltage ?

You really stripped it down for easy understanding and anyone can easily pick it up and use it in an application. Thank you for doing the video

This code to create a tachometer in Arduino is spot-on correct. Other like videos track # of revolutions in set amount of time, then extrapolate RPMs. The result is an RPM read that jumps in 60 increments, as every additional revolution in a given cycle results in +/- 60 revolutions. Mr. Hollinger's code is dated now, but still so relevant. Thank you!

A tutorial of epic proportions. Thanks a lot, Craig! It really made my day. Now I can PWM my way to victory.

rsisto fire

you are so smart that explaining things simply just comes natural to you

Thank you so much for this! Now I dont have to build both versions to see or hear what they're like. Excellent explanation

The live /hot/ wire is NOT blue in Europe

What model of Hall sensor did you used in video?

Microchip makes some fairly decent opamps with rail to rail outputs. Some have a built in Vcc/2 reference output for biasing an input. Their weakness is that they are only 5V parts.

Thanks! Great explanation. Very helpful.

Hi Craig, Thankyou for your video. I brought a 858D rework station that has lasted me 2years plus. Just today the hot air has decreased in blowing capacity so I decided to Google and have found your video. Upon opening the station I had found two resistors that have scolded marks on them. My question for you is even though your video is over 7 years old, do you still have the unit and how long has it last. Also it’s obvious that the more you spend the better the quality but if I were to pay an electrician to properly fix these issues would it be worth while or should I purchase a higher end station?

You never did initialize ledState. The 'default' case would be an excellent use for this. If ledState starts with random number greater than ledState6, default case sets it to ledState0.

Thanks, Craig. That's a very useful circuit. The two silicon diode voltage source is much better than a zener diode because the low voltage zeners are hard to source and only available in a limited number of voltages.

Thank you for your explanations

Un tutorial así en español

Nothing 'anal' about fully commenting one's code, rather it is a matter of ettiqute - respectful behavior towards others. For UI (user interface) programmers, the customer is their user. But for the rest of us programmers, our fellow programmers are our users. As a career programmer, I always appreciated a coder that commented profusely. So I thank you for the comments in your GitHub code.

Yes, I am enjoying this - immensely. You know your stuff and communicate with depth and clarity. I thank you immensely for this series. Just what I needed. also tire of the Artduino IDE. In a previous video you indicated that you did not know what Atmel (now Microchip) Studio's solution file was for. Atmel Studio is based on Visual Studio. As a multi-decade user of Visual Studio, I can tell you that they are containers for multiple projects. The project you outlined under source management could be broken into three projects all in one solution. Blink solution could hold an EXE (executable) project named, e.g., blink_test and two DLL (static libraries)-one for the bottom layer in your diagram named peripherals and another for the middle layer named componernts. If you want to get industrious, you could add projects for a database and a web site. All held in one solution. Open the solution and all the projects get loaded. On to the next great video... EDIT: As I proceed through these videos it occurs to me that what I describe here makes no sense for this environment - there are no EXEs or DLLs, just ELF, HEX, etc. EXEs and DLLs make sense in the Windows world, but not here. So I am at a loss as to why there are solutions here in Microchip Studio as you are.

Why not simply use a comparator? One input biased to 2.5v, other input to sensor output.

Did you try using motor magnets to be trigger hall? It’s very obvious

It's the same interior board design as yours with just two additional channels. I don't know the up and down buttons no longer do anything. Thanks for your help.

Hi Craig, I have a WEP 2008D with 3 channels, but I cannot get the temperature to set above 200 degrees on any of the channels. Can you please tell what might be the problem?

You could do a full 8-bits using just 3 pins with a 74HC595.

Nice video. Can you help explain why you need a triangular/sawtooth signal compared against an actual sine wave to compute the duty cycle?

Thank you for this great video. I have the same problem. When turned on, it starts counting from 1 to 7 degrees Celsius. And the same error (S-E) occurs. I checked all the wires and found no fault. When examining the resistors, such as the video, I found a resistance of 330 ohms. When measured on the board, I find 51 ohms. When I remove it from the board and measure outside the board, I find 330 ohms. When measuring its location on the board, I find 51 ohms. How is that, and there is no resistance at all

That seems to be a lot more useful for high currents than low currents. For low currents, a shunt is usually a good choice, dropping 100mV max is usually not a big problem and 100mV can still be measured reasonably well. However, for higher currents, you need to either lower the voltage drop dramatically (range of 1mV or lower) and have difficulty measuring such low voltages accurately, or you have large amount of heat generated + energy wasted on the shunt. Making magnetic measurements is far easier, just lower the amount of turns (or even have just one turn) and select the sensor to fit the measurement range in a way that most of the GND-VCC swing is observed, being easily measured by standard 5v or 3.3V microcontrollers.

How to send float variable trough UART?

First and foremost THANK YOU for all of what you are sharing! I am working through it all one lesson at a time and it takes several days to hammer everything into my head on each lesson. I really struggled on this lesson and could not get the code to compile.. I finally found the issue and corrected it.. The reason the code would not compile had to do with tc2.h not being a mirror copy of tc0.h. tc0.h used the structure name of "TIMER_COUNTER0_TYPE" where as tc2.h use the structure name of "Timer_Counter2". Once I got that corrected, I had to align the StructPWM.c file to use the correct names as well (it was using "Timer_Counter0" & "Timer_Counter2" rather than "TIMER_COUNTER0_TYPE" & "TIMER_COUNTER2_TYPE"). Thanks again for the content!

Excellent series! After watching this I studied it very slowly and inched through it over and over again making sure that I understood every little detail and then I decided to try and port it over to an ATMEGA32 that I had laying around and I learned a ton! Thanks for the content! I posted a 12 second clip of my successful ATMEGA32 experiment at th-cam.com/video/B08lzcjfIaA/w-d-xo.html

blue line in europe is neutral, and live is brown. green and yellow is earth

Good! From Korea.......

U-INT NOT UN-INT

Could you help me with a similar station, it seems out of control, when I put the gun in its place to cool down, it does not turn off completely, it turns on by itself and the fan speed increases much more than normal, I have checked it but I cannot find the fault . I appreciate any help.

Legend brother

thanks

thanks

To reduce confusion it's an opto-isolator connecting to the triac.