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I put the full code on my website circuitsecrets.com. There are a ton of source code and a few schematics and other files available there. There is no signup and the files are all free.

All of the code for the VFO is on the circuit secrets website. circuitsecrets.com

I think its more the build tools that need all the excess information.

@@CircuitSecrets thanks I finaly got picoW working after about 4 hours pico_cyw43_arch_none was missing from the links

DDS in this context stands for Direct Digital Synthesis. The SI5351 is a digital clock generator it directly synthesizes a signal based on a digital input signal which comes from the Arduino. So with all of those considerations, this design is simply a Direct Digital Synthesis VFO

@@CircuitSecrets No, DDS is specifically a technique where a stored sample of a sine wave is clocked out of memory at varying rates to produce "directly" a sine wave at the desired frequency. Skyworks do not refer to their Si5351 as DDS, because it isnt. The Analogue Devices AD9850 IS a DDS synth and VFOs based on it can be called DDS. Do some research, dont repeat UA-cam misinfo. Thank you.

@@bazzaar1869 I just looked up the definition and utilization of DDS and you are correct. This is not DDS it could be said to be a PLL VFO but not a DDS, so thank you, I stand corrected.

Types? Do you mean data types? Do you mean variations of freeRTOS?

Yeah, the main connection would be to the 37.600 crystal position. The offset would be set to 10.635. Operation would be on channel 1. Double check all that with a dummy load, and frequency counter.

@@CircuitSecrets thank you very very much , I will try to measure , but did not have a lot time , Other projects keeping me busy 🙏🏻

I am looking to revamp a lot of the projects this fall. Wifi and browser or bluetooth is what I was thinking for this one. Just to make it nice to manually remote control.

Did you bypass the transmit lock? If everything else is working, and the radio was transmitting before, that is where I would look.

Yes I did, the tx circuit works reducing the 5v to 2v going to D13 arduino right

@@GusNava I think you are confusing the tx lockout feature on the pll with the tx rx switching on the vfo.

I would use a visual studio app for a gcode sender and control unit for the cnc. You can send code with that through the serial port and synchronize operations of the GRBL board. Motor control boards need to track both the input step and direction, and feedback from the encoder to adjust motor position. I hope this helps, good luck!

@@CircuitSecrets Gracias por Contestar,excuseme que parece que no me explique bien,con respecto a su proyecto , me gustaria ver la forma de leer las Señales Step y Dir en el arduino pero sin Utilizar Interrupciones Externas como estas ISR(PCINT1_vect) //read the data from port C the first two bits, ignore all others grblStepData=PINC & 0b00000011; sino hacerla de otra forma si la hay, con respecto a mi proyecto yo logre controlar los motores de mi CNC en Visual Basic enviandos los comabdos via serial y el arduino lo recibia y lo comparaba con la lectura de los encoder para ejecutar los movimientos ,en mis videos podra ver mi trabajo y si le intereza puede descargar los archivos que estan disponible, gracias por todo

Those are excellent questions and point out the issues of accessing hardware with an auto pairing method at runtime instead of keeping a master list somewhere. Ideally I imagine a mode that new hardware goes into on first run. It can pass its info into a central DB of some design, and all of the info would be together with the name of the device, its port number and everything else. Set a manual flag to initialize one port with the full device info.

Thank you so much!

Thank you!

The connections to the hbridge should be the common ground of the grbl board to the digital ground of the Hbridge. The power supply of the grbl board to the digital power of the hbridge. The other two, the 2 digital control pins should be listed in the source code. The analog power in side of the Hbridge takes the ground and power from the motor supply. The output pins of the Hbridge takes the wires to the motor. There are 4 wires on the input side of the hbridge which are the 2 logic or control wires, the ground and the power supply of grbl board. The output side of the Hbridge is 4 wires, power, ground, and the two motor connections. The pinout is different for each Hbridge, so refer to the data sheet and the source code for the motor controller for more details.

@@CircuitSecrets Thank you very much 👍

There are too many wires to diagnose from a picture.The easiest way to troubleshoot the system is to work from the hbridge backwards. If the hbridge, motor and nano motor controller are working properly when you turn the motor the hbridge should activate and attempt to return the motor to its original place. You can use an led on the motor controller to test the encoder setup. If memory serves the led pin is listed in the sketch for the motor controller sketch. Make sure the digital grounds are all connected and the analog ground for the motor drive to the hbridge is separate from the digital grounds to prevent noise.

​@@CircuitSecretsHello, I was once again forced to send to your country to buy the same module that you used in the video, I would like you to tell me what the pins are connected to (R Is and L Is) 😅

​​@@CircuitSecretsI also need to know where you connect the pins (enable A and enable B), since in the video only the pwm lines come out of the Arduino nano, And the value of the resistances that the infrared receivers and the emitter have

@@TornoyfresadoraRDLpwm and Rpwm take the pwm output from the nano.

@@CircuitSecrets I think I did it 😅

All of the digital grounds should be together, the analog ground to the hbridge should be separate to avoid noise from the motor on the digital grounds.

The encoder provides feedback so the steps can be measured. Traditional cnc machines use stepper motors that move in steps, a D.C. motor has no steps so the movement must be measured. With this design a D.C. motor will simply keep turning if the control board receives a step command..

@@CircuitSecrets I have been able to notice in other examples of similar codes that the signals leave a gap causing the machine to ultimately not execute the movements with exact precision. Something similar has happened to you.?

Thank you, I am glad to help.

Thank You!

The older radios with simple crystal mixing are all easy. A schematic and tech notes is all it takes to figure out, then swap a vfo with the proper offset for a crystal. Even more modern radios use mixing and you just bypass the vco and inject vfo in its place.

Each device has its own address, you can access multiple devices on each channel.

Right having the ability to shut down or change the voltage output of the smps gives a lot of options. The first 2 stages are just a normal series layout, the 3rd stage is a parallel configuration. I do se what you mean about the 1st and 2nd stage looking like a darlington stage. Thank you!

The lower half of the schematic shows the filter setup I use with the power supply module. The schematic of the module itself I do not have access to as I did not design the module. Wiring diagrams for the power supply module are available from shop-tes.com which is the site of the producer and distributor of the smps module.

I got as far as milling part of the bed flat and had to tear it down to make room for other projects. I plan on putting it together again hopefully this winter and doing more with it. Especially since my videos about DC motor control and CNC have gotten more traffic lately.

@@CircuitSecrets Your idea is good because no one knows how to explain this thing about CNCs with DC motors. If possible, I would appreciate it if you added Spanish subtitles for the logic part in your next videos, since there is not a single video in my language. within all UA-cam that explains this

@@TornoyfresadoraRD I need to find a way to generate subtitles in different languages, maybe AI. If you know of a easy quick method let me know.

@@CircuitSecrets ok

@@CircuitSecrets Hello, give me some way to contact you to show you some projects, today I made a homemade driver for mach3 capable of receiving signals from the Chinese red mach3 card, this driver has the peculiarity that the power stage can be decoupled to increase according to need In the next few days I want to test your code for DC motors and encoders with mach3 and I would like to send you the results

I have never used mach3, but if it gives step pulses and direction signals that a normal stepper motor controller uses then it should work to drive a motor, encoder, and Arduino nano set running as described.

@@CircuitSecrets I have seen that they make homemade drivers to work with the Chinese mach3 cards, they use the IC l297 which I have also seen in homemade drivers for motors with grbl, and they have in common that they connect in the same way both in the mach3 interface and in the arduino that carries the grbl firmware. I imagine that they should be very similar signals, another thing is that in mach3 you can configure the number of steps per revolution and also the time in milliseconds that each pulse lasts.

@@TornoyfresadoraRD Nice, yes that sounds like it would work.

Thanks for the offer!

It is the simplicity of the circuit. It makes for a good primer on how to modify the mixing circuits of radios. A simple cheap DIY approach that is meant to lower the entry point to learning and modifying radios. Anyone will feel comfortable experimenting with these methods on such a cheap radio, and if their experiment fails the education cost is still low.

I bet you think the audio off of channel 6 is impressive.

Could you please share the one-click tool? Thanks.

Nice, just use caution transformers can be very dangerous, an smps can be dangerous too, but they don't run the risk of a short to the mains power.

I still have to do a revision for ssb, these are designed for AM, CW, FM only. I hope to get one done for that this fall or winter after I get a side band radio to use for a test bed.

Why bother? Those are junk radios, only 8 to 10 on ssb. Don't polish a turd

That is an awesome idea! I would use an arduino nano instead of the ESP32 for that especially if its HO scale or smaller. Other than that its the same thing, let me know when you get it done, would love to see it!

The Washington is a SSB radio, unfortunately the current vfo design has no offset for side band and no fine tune for clarification. I intend to add those features to a vfo design in the future. This design works great with AM, CW...

@@CircuitSecrets there is one on the market I've seen that has ssb capibility.

@@KarlM777 Yeah I saw that, my final version will be similar, but all open source. The firmware will be totally free as will the schematic design. I am not trying to sell anything, just educate as best I can. That is why the series on I2c explains all of the parts for the VFO, then I show how the vfo can be built with two different micro controllers, then a couple of installation videos.

@@CircuitSecrets I'll wait for yours. I like building things

I am planning to release a video and code for one more VFO design this fall or winter.

@@CircuitSecrets AWESOME!

Strange, I will have to look into it. Maybe something has updated, but set seemed to work for me.

I built the whole thing around the notion of using it for 10 and 11 meter. It would take a fair amount of work to convert it to that band, but it should be possible. I give a very detailed explanation of the operation through the I2c series, that and the source code should make it fairly straight forward to modify. Give it a try, I have faith in you.

I am getting everything together for the next batch of videos, I will try to squeeze in these and explanations of a few other more advanced features of FreeRTOS then.

I am not really familiar with that module. The biggest hang up I can think of is the default I2c pins in their library which I have not looked at. You will have to use a library for that specific module, but the examples in this series will at least show you how to find the address for the module.

I am kinda confused with the wiring. Would I connect both the raspberry pico and the peripheral (i2c module) like how I would normally and run the port scanner code from there?

@@razaula Yes just set the pins of the scanner code to the pins you are using, set the SDA and SCL inside setup.

Just use the same numbered pins and it should work fine. Digital pins 2 and 3 are used for the encoder. The nano and uno are pretty much the same I used the nano because they are cheaper and come in three packs which is perfect for three axis of motor control. Remember you still need another arduino for the grbl interpreter.

The Arduino based grbl control board takes gcode from the computer and creates step and direction pulses on 3 separate channels(one for each axis). Each of the arduino motor controllers takes step pulses and controls an single axis. Look at any wiring diagram of a grbl control board connected to motor controllers, and replace the motor controllers with the arduino based motor controllers. P.C.>GRBL>>>motor controllers. Each of the 3 motor controllers has encoder, hbridge, power, ground, step and direction connections. The step and direction connections go to the GRBL board step and direction connections. I hope this helps, if not, let me know and I will try to create a wiring diagram and package it with the source code for the controller.

The ino file is the source code, the arduino IDE uses a c compiler to link and compile the executable that is uploaded to the micro controller. Eventually I am going to do a video on porting from pico to ESP32 for the VFO project. I did a video that covers a little about porting the vfo project from the pico to arduino which might be useful for you. ua-cam.com/video/_bQmQNo8WV0/v-deo.html

@@CircuitSecrets Thank you

An absolute encoder would require a complete rewrite, and it would be extremely cost prohibitive.

@@CircuitSecrets I actually am in the process of putting an arduino together now and took the encoder apart to have a look for the detent. There is a ring inside that is close to the shaft end that has the detent built in. I took a small screwdriver and flattened it out some and re-raisd the ring back up, the put it back together. In my case, I wanted smooth tuning, and this absolutely worked without any problems, and it still functions normally. I don't recommend anyone doing that for a mobile, tho.

@@Guns_N_Gears That is awesome! As long as it still works. The encoders I used to build the prototypes were really cheap and easily messed up so they would not read if too much side to side pressure was applied, seemed to damage contacts. Good luck!.

@@Guns_N_Gears get one from Yaesu for an HF rig.

@KarlM777 I have since found smooth mechanicals on the web @ about the same cost. The encoders that Yaesu and the like are optical style, and would require a program change. The style used like this video are mechanical type, basically a couple of pushbutton switches ganged into 1 rotary unit.

That is basically a line isolation transformer, so in theory it could work, of course it would need rectification and a lot of filtering. Then you would still need another transformer to supply the filaments as the first stage seems too small to serve both purposes. Good luck.

@@CircuitSecrets Thank you!

@@kingkorg7583 You are welcome, don't forget to watch the voltage after rectification and be cautious those voltages are enough to kill.

The examples from the video can be found at www.circuitsecrets.com

@@CircuitSecrets Thanks. I was looking for help and I noticed that Mbed is a RTOS also.I may be wrong about that! Have you ever looked at that.. Thanks again Richard

@@richardbrown2290 I noticed it but have not actually tried it, so I can't help with that.