By connection ardino can I switch 6 channel input output separately ? Is there any available 6 in and out

hi, i have a question, i am trying to work on a project that can "hear" from the input pins and stream it on a webpage with a button, from pin 32-39. and i cant make it to work. can you give some insight?

Is it better to use more than 2 pcb file for better result?

Hi, very interesting video, congratulations. I finished my first kit but the gain is 19-20 db and not 26. Vin=13.8 i bias=0.3a From the video, if I'm not mistaken i can see that with 7 vpp (20.8dbm) you get 9w (39.5 dbm) which corresponds to 19db. To obtain approximately 26-28 dB of gain, is any particular precaution necessary, such as adjusting the input impedance? Thank you for your video. Gab

Cool video. I will have to check out that library. I do like to know whats happening at a low level though. That one line of code copier.copy() does a lot.

Hello, does the ESP32 just produce the clocks for the PMOD ? If the I2S RX pin is not being used what is the internal I2S of the esp32 doing except acting as the master for the I2S in the PMOD ? Sorry if I missed something.

No update on this project since heading to Australia? I worry a Kangaroo got him.

Hi there .. thank u for the explanation.. may I ask more about the design?

Hi, great video. Do you have some video about this BPF topology and construction? I’m looking for a 915MHz BPF. Thanks

And sorry mate, I understand the reason, I hadn't paid attention to your explanation about the 2sc1971.

Hello friend, how are you? I saw in your assembly that the T2 coil initially had 4 turns with the thicker wire and 1 turn with the same wire. But later it appeared with 4 turns of thinner wire and 1 turn with the thicker wire, I ask: What is the reason for this change please?

In generating a sine wave example you use sample rate of 4100 works great, but how can I use higher sample rates... I'm having problems with the Nyquist frequency limit.... Actually all your examples use 4100 sample rate, is this the highest rate esp32 or Pmod I2S2 can do..

I'm working on an AY-3-8910 project of my own, interfacing it with a Pic18F46K22. Programming it myself and it works fine but there was one thing that had me baffled for a while so I mention it here : The datasheet lists the registers in octal notation. So, writing to registers 10 to 17 (as the datasheet numbered them) didnt work as intended because they were really registers 8 to 15 (in decimal). Of course, the datasheet did use a little subscript "8" in the text but it's all too easy to assume decimal (who in the world uses octal anyway? 😅). Don't be like me and waste hours trying to find a bug that was really a reading issue 😄 Also, I use a 3,579,545 oscillator to clock the thing (halving the frequency with a 7474 as clock divider). These oscillators are still widely available (it's the NTSC color burst frequency). Lists of musical notes converted to tune values use this frequency because this oscillator was prevalent in the home computers of the 80s that used this chip.

I'd like to use this (or a similar) amp for a 6m beacon. Can this amp be modified for FCC legal use on 50 MHz.? Limiting factors?

Would this amplifier work at 50MHz.? If not, what are the limiting factors?

This video is of a tremendous help, Thank you.

Tinning a longer section of the magnet wire is a good idea. Trying to cut it all to length and installing is harder.

I have one showing power out on the wattmeter but I hear little from the transmitter on another receiver. It had a rough note at first. I will start back at the dds with a scope.

What If the the transformer is trifilar?

Saya mau tanya, kenapa transistor driver 1971 nya sangat panas dan berapa berapa watt keluaran transmiter ini ? Mohon penjelasan ?

Using RIT you change the locking frequency of the PLL slightly?

I found this today but it is an old video. I bought a shielded indoor loop ant for an HF receiver but found the output very low. I decided the MAR 6 chips that I had never used would make a good low noise HF booster with 20 dB gain which is about perfect. I made an approximation of the Mini Circuits prototype PC board. The 1% resistors to bias for given supplies was a PITA so instead I incorporated a pot into my board and used that to set the required 14 mA current drain with a fresh 9V battery. Very small enclosure with SMA conns to match the antenna at the loop/balun end of the coax. Now I found out a ham bloke WA5VJB makes small PC boards for MMIC amplifiers, which are generic and can be assembled for any of these 4 lead chips and they are very inexpensive. Check it out.

What does this do?

Would have loved to see the effects of symmetrically changing the capacitance of the varicaps, and non-symmetrically

Good job Ian. Good to hear you still have an Aussie accent. Cheers VK5LB

Hi, i know this is an old video but it is just what i needed to see, and i have a question. Wouldnt it be better while converting from a push switch to a ESP32 to just remove the switch and add a transistor in its place? The base of the transistor then goes into any GPIO of the ESP32. This way you use one pin instead of two. Would that be a viable option?

Great project! According to you is there some issues in using ADC converters of ESP32 to sample audio input instead of I2S?

Thank you for posting this video and source code! It has been tremendously helpful and a huge time saver. I recently picked up the PCB Artists ES8388 as well to develop an LTC timecode generator/analyzer. I would have had to spend a lot more time plumbing the depths of the esp-adf repo if it weren't for your help. Thanks again!

Nice vlog. Question why dont you reduce the audio sampling freq from 44k to say 8k so then you wont need a software low pass filter of 4kHz?.

Have enjoyed your videos. Hope you are doing well.

Came here when I was trying to learn about LMR SDR! 73 Jon, VU2JO

Brilliant analysis on the coils, thanks

I’m enjoying your SDR videos 😀

You are lucky. I got this board with SMD parts not soldered.

Hey man. I love your channel. Im a hobbyist with a decent bench but i lack some of the higher end gear. I spent my spectrum analyzer money on a new guitar last week. Im going to get my ham license, there isnt alot of hams around here. I was wondering where i shoukd start. Id like to dig into the signal analysis. I habe a bunch of different parts ordered and such but i dont plant to transmit until i get a call sign. I worked on radios as a 911/police/fire dispatcher after i graduated with a software engineering degree but didnt want to move away. It's been great for teaching myself alot of theory because i love math and circuits. Rf scared me for a long time because of my work experience and it is aomewhat unapproachable until you learn alot related theory. Should i invest in a nano vna and tinysa to dip my toes in before i make any big purchases. Its the antennas that are giving me the most confusion (for lack of a better term) i dont know where to start first when i buy my first base radio. I love the whole theory behind the rf mixers and different filter types. Id be lying if i said i completely understood the implementation on a circuit level but i have a grasp of the general theory behind the different stages from a birds eye view. Im looking for advice i guess on where to begin. Maybe a book recommendation and a starter kit of general items i need to have on hand. I find the sourcing of toroids the worst along with antenna choice for someone new to the rf side of the electronics hobby. Sorry if im rambling but ive watched alot of your videos and have seen alot of kits for the circuits you rebuild and test on ebay. You seem like a great guy to ask. I have alot of parts on order that ive seen you use and alot i already have. It's just where to begin, i love the learning aspect of it the most from what ive seen. Plus everyone in the hobby seem like great people.

Board cost please

É possível fazer o mesmo com potenciometro de membrana soft pot?

Could you please upload the es8388.c, i2s_stream.h and the i2s_stream.c?

Good guide, thank you! I was wondering: does solder paste make this any easier?

Beware. I bought this kit and the sleeve tubes provided for the ferrite cores are non-ferrous stainless steel, zero chance of soldering them to the end caps. Luckily I have some brass tubing suitable for both core sizes, but the kit I bought was supplied to fail. Its not a question of needing more heat, I have a metcal iron, I even tried pre-tinning the ends of the tubes with a mini butane torch. Tried different fluxes, they will not take solder.

The accent and callsign were not coherent? Went to QRZ ....all is clear now mate! Great content, I have been wanting to build some small SOTA type rigs....this is exciting stuff. Thanks for sharing - 73 de VK2AOE.

As I read it, the pin spacing on those chips is 0.020... I routinely solder SSOP chips with spacing of 0.025, pretty easy and reliably. The trick is not to worry about shorting the pins, just dump a glob of solder on all of them, and then "wick off" the excess solder... the capillary action of the wick will do a good job of sucking off the excess solder and leaving a clean installation... obviously it should be examined pretty closely when done to ensure no bridges exist... but if they are found, just re-glob the chip and wick it again. Everything should be clean before applying any solder... that includes the iron tip, the solder wick, the solder itself, the PCB and the chip.I routinely solder down the diagonal corner pins first, to ensure the chip is properly centered on the footprint. ( confirm that with a close inspection, maybe with a jeweler's loupe or a low power microscope ) That might be pretty hard with spacing = 0.020, but maybe hold down the chip with Kapton tape on one side, and then solder pins on the other side of the chip, to immobilize it before removing the tape and soldering the remaining side. It might take some practice at first but should be fairly easy, once a few blunders are behind you.

Big confusion on which schematic to follow for this kit. I've found about 4 different ones all with variations on resistor values. 4Z4TJ's version is what I went with but it's different from yours.

Hi, trying to build your software for this, getting "invalid conversion from 'int' to 'i2c_port_t'"

Came back to rewatch this series because there's tons of valuable information in it, thank you! I was wondering, since the ES8388 has 4 input channels, would it be viable to completely ditch everything after the capacitors in the Tayloe detector and feed the 4 channels individually into the ESP32. This would allow you to compensate in software any imbalance between the 4 phases and get rid of the dependency on physical component tolerances. This might also simplify the Tayloe encoder, if you feed the multiplexer directly from the ES8388. Heck, you might even be able to use the same multiplexer for both encode and decode. I understand how this would prevent you from using the ES8388 for the mic and speaker, but the built-in ESP32 DAC and ADC is sufficient for those, in my opinion. Hope you're well and will have time to continue this series! Take care and 73, Dren - Z63DNI.

English version please?

i once thought i had bought a collection of betamax with the hidden episode ;). your SDR video brought me here. as old-electromusik noddler myself very cool! love the AY in a modular format!

Can you test it without a lowpass filter? if so how ?

That is why there is reason to counter intuition.

Looks like the output buffers are weak, even at 12MHz. What is your load capacitance like? EDIT : Oh wait, I forgot about the scope bandwidth.