RC256

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@maxlanda466 2 күн бұрын

Great it worked perfect for me. Thank you

@Mohammed-vm9ns 7 күн бұрын

@vince6829 25 күн бұрын

Thank you for sharing.

@johnosborne2224 Ай бұрын

Thank you

@IlicIlija Ай бұрын

Hi there can i use a 16.000mhz 2 pin crystal for my transmitter?woud it work and on which channel exaktli?

@jamesknotts1546 Ай бұрын

Old tvs don’t work hit it on the top or sides and sometimes it works

@jamesknotts1546 Ай бұрын

So is the decoder app on the phone decoding by sound or bofeng hooks into the phone?

@uguraltunbilek 2 ай бұрын

thanks for this beatiful explanition

@ginger_tyler 2 ай бұрын

Where’s the charging port!?

@ExploringNew1 3 ай бұрын

Making youtube videos for 5 years and still having 800 subscribers should be illegal. Give this man some attention

@coryingman 3 ай бұрын

There's a wholesome energy coming from this channel. I like your mild manner and tinkering tendencies.

@iWantMyCookiesBackk 3 ай бұрын

Man You're making videos because you like it not for becoming a big KZbinr love that I love watching small channels rather than big channels because I can reach them very easily and talk to them some time By the way I'm also from Pakistan keep it up 👍😊

@mtb.connr2 3 ай бұрын

This is incredibly dangerous just for a small spark. You can make a much more impressive discharge with say a 200v 3300uF electrolytic capacitor connected to mains through a bridge rectifier. Still deadly but much much safer. I can make a video demonstrating if you would like me to. 👍 stay safe!

@stuart6607 3 ай бұрын

A really good explanation of the inputs and outputs, but using wood, that's scary dude😵.

@hobbyrob313 3 ай бұрын

AM kzbin.infouWY09Zvka_k?feature=share WFM kzbin.info-ZeYEswEcoo?feature=share R.Rob

@hobbyrob313 3 ай бұрын

I've been watching the videos you made about AM transmitters and it looks like your receiver isn't very good either! if I do/make the same thing then everything I do is better, the signal and the sound? do a Google search for grenade transmitter and look at images? pretty much the same oscillator and it works perfectly for me! (I'll keep an eye on you!) Next video I expect nice sound ;-) Healthy and Friendly Greetings from the Netherlands! RadioRob (MW, SW and WFM Piraat!)

@nol_yaw 4 ай бұрын

I am going to put a j pole up so i can hear my local police and ems trunking p25 system. they are on the 150 to 160 mhz. i'm confused if i will need a LNA the antenna will be about 30 feet away.

@IanGSully 4 ай бұрын

Newer computer power supplies will usually automatically detect what voltage it is and set itself accordingly.

@SBPepperminion 6 ай бұрын

2:43: Should've used the term "handshake" as your metaphor.

@duanebodrick3227 6 ай бұрын

I like this video

@lonesplashy5310 6 ай бұрын

I found my old computer and i was curious abt what i left on there and then realized i forgot how to use it and i was missing the charger n didnt know what to replace it with lmao. Makes sense considering the last time i opened it i was a little kid but still a little embarrassing as a self proclaimed outdated tech fan. Admittedly my knowledge is kinda limited on the technical side outside of robotics tho lol. I mostly just go on abt when stuff was made and who made it and why.

@randyc8171 6 ай бұрын

Informative video. I have a real small Starto hand held oscilloscope and it works OK. It runs on 9 volt DC input.

@CurtisBoyle 6 ай бұрын

Quick tip: The Coco 3 defaults to 0.895 MHz CPU speed (same as the Coco 1/2), but you can double that with POKE 65497,0. Makes the little type in programs run twice as fast. If you or Brady want to get into all the software available, I would suggest getting a CocoSDC (available from several manufacturers, and allows using SD cards to emulate both floppy and hard drives, as well as adding some extra capabilities), and then hitting the Color Computer Archive. There are thousands of programs available, and new stuff is still being written.

@electronic7979 6 ай бұрын

Nice review video

@randyc8171 7 ай бұрын

Very interesting.

@Tech_481 7 ай бұрын

That hurts me what you did to that woodgrain philco. I fix and sell on crts and im sure that it just had a broken solder joint! I get you have to many so i understand why you tossed it lol

@Tech_481 7 ай бұрын

I love doing this! My local city doesnt have a curb pickup unfortunately but The next closes town has it and I drove around and picked up around 23 crts! And a few flat screens as well!

@christopherrasmussen8718 7 ай бұрын

I’m impressed. Read your QRZ page. Extra at your age is fantastic

@christopherrasmussen8718 7 ай бұрын

That’s a very good demonstration.

@Stefan0719 7 ай бұрын

Analyzing the circuit a bit. It might work, but some of the components don´t make much sense. The audio amplifier provides (based on it´s values) to less audio level to get a "full" modulation out of the transmitter. It would work much better, if "R6" would not go to ground, instead it would go directly to the collector of "Q1" "R4" removed, and the bias re-aligned. Instead of the voltage divider R1 / R2 you could just use the 91k and connect it from the base to collector. Also connect Q1´s Emitter directly to ground. That would form a proper AM modulator, and would create a good and loud modulation. For shortwave, "C10" can be reduced to .022 instead of .1. That would improve modulation quality a bit. The Resistor in series with the coil... has what... exact... purpose? Talking about the 22µH coil - at least the value of the coil is "okay-ish", if you want a high impedance output (Which is okay if a short antenna is used). The oscillator could use a safety resisto, bc as it is now, the fet is directly between + / - so, if sth goes wrong, it´ll go "pop". Also there´s no antenna matching, but for the said distance "up to 70 yards", it will do without matching. The transmitter, as is, is most likely going to work... but I doubt the modulation level it can achieve is anywhere near a "makes sense" useable level. How should the modulator drive the "pA" if it´s current limited by high value resistors opposed to low value resistors in the final amp? If such a methode would "supposed to be used" the modulator would require far lower resistor(s) to provide enough Audio signal to the final amp. You said you do co- work building transmitters...? I can make you a very-very- simple 2 transistor am transmitter / shortwave transmitter, that has >70yards range, and far-far-far less components than this circuit... ... With more than 20 years of RF device (build receivers, transmitters) experience I just *had* to leave a comment here. Good luck getting the current circuit to work tho (not meant sarcastic)... I may check here for the results ... eventually.

@daisywong-ke1kz 7 ай бұрын

Really glad to be a part of this great work. :D

@awaismushtaq5719 7 ай бұрын

Greetings sir. I'm glad you pointed out number of short comings of my previous TX circuit. Audio amplifier design was good but problem was with that laptop jack output increased level of audio which disturbed biasing voltages and distorted the output. I got rid of it and used TI's LM386 WITH 10 k-ohm Potentiometer at the input to control audio levels. Also, please, use a smart phone in place of laptop as it's output impedance is better matched with audio reproduction circuits. Second problem, the oscillator, I replaced it with Colpitts crystal oscillator which outputs 200 mV enough to drive modulator. I shall still suggest to use an emitter follower for isolation purposes so modulator stage doesn't load the oscillator directly. That way the frequency won't shift. I re-calculated the modulator circuit values for 100 mW of power and wound a T-50-2 type toroid with 23 SWG enameled wire equivalent to 22 AWG; 28 turns on primary and 9 on secondary gave me what I wanted. Needed load at modulator stage is 385 ohms and with 9 secondary turns on toroid, I matched it to 50 ohm coax transmission line/cable. I also designed a Band-Pass filter for it that works as it should. If you agree, I shall send you the improved design that still is targeted for 7.2 MHz. I have built it and almost got caught by FAB (frequency allocation board) our equivalent of American FCC. Just say it, if you need it. Nice video BTW. O and the N-channel JFET is cursed. Also, if I may make a humble suggestion, try using an EMI filter on AC mains to your PSU. With RF work, it's an utmost necessity. It does excellent work of removing RF remnants from power rails. If you agree sir, make the changes and it should work. My apologies that I got your money wasted. Let me know, if I can repay. Regards!

@rcat256 7 ай бұрын

Thanks again for some more advice! I would like to stay with the simple nature of the current transmitter design, but I would not mind taking a look at your newer design (send via email again). I've been trying to build my own band pass filters for this and other transmitter circuits, but I have trouble figuring it out. In the setup in this video, I used an iPod nano as an audio source. I have used laptops and cellphones during other testing, but most of the time, I use the iPod. As for a power supply, I usually use a 9v battery. This time around, I got a hold of a 12v battery that gives it a bit more power. My circuit was completely isolated from mains (even the portable oscilloscope was battery powered), although I did not apply any shielding this time. Interference has not been a big issue for me, but I keep it in mind. I have gotten a hold of some T50-2 toroids as I plan to use them for impedance matching later on. I still want to make a ham radio enabled version of the circuit in the future. I think for now, I will use my usual oscillator in later circuits because I cannot seem to get the JFET version to work. As I said in the video, I built it many times and I have used several different 2N4117's with no luck. Thanks again and best wishes!

@awaismushtaq5719 7 ай бұрын

@@rcat256 I'm sure you'll get it working soon enough, sir. A simple suggestion on audio amplifier part, the previous audio stage of mine was to be fed from a mic, an electret capsule to be exact; that vital part I forgot about. Please, keep in mind no single amplifier stage can get you the gain and power you need. You'll have to use cascaded stages, two at least. Excellent idea using PP3 and other PP series batteries. They surely solve the clean power rail issue. I use a PSU because at 100 mW power, PP-3 gets depleted fast. Also, LM386 consumes quite a lot of power so PP-3 life is shortened even further. Previous circuit was designed for 50 mW and for that PP-3 did well. I used LM386 when I realised my mistake that a pre-amp for mic won't do at all with then prevalent circuit conditions and that I needed multi-stage amplifier circuit. Instead of re-inventing the wheel, I used the existing low power LM386 which served my purpose excellently. If I may make a humble suggestion, you can drive modulator with LM386 without having to use direct power input. You see that LM386 internal circuitry reduces the applied input by a half; means 9 volts shall be halved to 4.5 volts, sufficiently high to drive modulator (with a choke of 10 uH at amp output pin to block RF getting in) stage and still give you up to 200 mW of RF power. Choice is yours, sir. I'll send you the new circuit in digitised form soon. Stay safe!

@PhirePhlame 7 ай бұрын

The reason behind the command and/or only booting it up _after_ inserting it is because old-fashioned serial ports weren't designed to be hot-swappable. Thus, they won't inherently be like "oh, the user just plugged something into COM1 and it's X type of device". In fact, serial has no device-independent way of sensing a device's presence at all. So if I had to guess, on boot, Windows probably loads the driver to each of the attached serial ports and sees if any of them are getting mouse reports, and then unloads it if not. After all, you don't want to tie up the serial ports constantly checking for a mouse since you might have some other device plugged in.

@tightwad 8 ай бұрын

Feel WAY better about my main panel.now. Only 1 nuclear bomb bent my wire runs. Did you piss off Putin or Kim Jong somehow?.

@awaismushtaq5719 8 ай бұрын

Brilliant! Cool work

@nrfchannel8580 8 ай бұрын

Nice video . I like visited ndb stations.

@daruscole1586 8 ай бұрын

I still have a Radio Shack Science Fair electronics lab. It helped me learn quite a bit about electronics. It has a transmitter experiment and is okay as long as it only sends your voice to an AM radio maybe a few feet away and keep the antenna length under such in such unless the FCC rules have changed.

@radiosnmore 9 ай бұрын

Brosk

@RelayComputer 9 ай бұрын

I love this kind of stuff. I made a 10 bit calculator which also does multiply and divide, only with electromechanical relays

@David-hm9ic 9 ай бұрын

This is an excellent point. I had a new workshop wired by a licensed electrician that made some serious mistakes. He put 120V 20A outlets on 240V circuits and ran 8 gauge wire on 20A 240V circuits That's a problem because 8 ga wire won't fit the connection points on 20A outlets.. He spoke no English and my Spanish is poor so I decided to put the correct outlets in myself. Now I need to go back into the sub panel he installed and make sure he didn't wire the grounds as you had originally. Thanks!

@iblesbosuok 9 ай бұрын

A 4040 CMOS binary counter (CD4040B, HEF4040B, MC14040B so on) has similar function of 3 pieces of 74(LS)93. A 4081 CMOS AND gate has similar function of a 74(LS)08. In CMOS platform you can build an AND gate from two or more diodes.

@maxvideodrome4215 9 ай бұрын

I enjoyed this non microcontroller video. Subscribed. I recently purchased a bunch of 27Cxxx to use as custom 'logic gates' instead of memory :)

@rickharriss 9 ай бұрын

Not putting your efforts down but these days it would be so much easier to programme a Single board computer to translate text to morse code. That way its more flexible, can have extra facilities such as variable speed or tone. Jsut saying.

@blvckbytes7329 9 ай бұрын

You are aware of the fact that this is not a commercial product, but rather a hobbyist project, right? Just fleeing into the world of microcontrollers or FPGAs because we can is not the solution to truly learn about electronics. One could easily build a little state machine that translates ASCII from a RAM into morse code signals based on low level ICs or even on transistors and diodes, so the set of features is no counter argument here. Why not take a deep dive instead of just gluing code together?

@SusanAmberBruce 9 ай бұрын

Great stuff! Here's a video I did on using an Arduino UNO to generate a morse message. kzbin.info/www/bejne/fpvSl6CFg7OKfpo

@neilaldenarmstrong9806 9 ай бұрын

I did this over 45 years ago using 7490 bcd to decimal counters to cycle through lines, some 7402 quad nor gates to gather up all the signals, a 10 x 10 matrix of wires to which I soldered diodes to generate the bit pattern and a 556 chip (one for the clock and one as the tone generator). Connected to 5 volts, pulling a line low started the sequence where it output "DE WA2xxx" (my callsign). I don' t think.eproms existed back then. Now, a little Atmel ATTiny85 could do this so easily, and be reprogrammable without unsoldering and resoldering diodes. BTW, I used Radio Shack 1N34 diodes which were awfully heat sensitive and it took a lot of VTVM measuring to determine if a Morse error was a programming mistake or a diode destroyed by soldering heat. Ah, the good old days!