DIY TGSL STEP BY STEP BUILDING AND TESTING

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The only books I would recommend buying are the ones that are for sale. And then they would have to be good books( inside the metal detector).
There are however much variety of Free eBooks online one can download. I'm not talking about pirate, but genuine free.
Like Navy course and U.S document from various departments. All free and all the best.

[Qiaozhi]

your words make sense so let me make a post on my oscilloscope settings and Tx Rx readings and then i will wait for you to suggest the first free book/books from internet to read. Besides i know basic mathematics, geometry, physics, biology and chemistry and I have experience in plugging woofers direct in to 220v AC. i also have analog 20MHz oscilloscope and digital multimeter. I have arduino nanos and unos and breadboards and everything required to make a pcb plus three sets of components for TGSL, BARA, FFLEZJOO and KING COBRA... to help you recommend study material.... shall be very thankful

You must have spent a fortune on components so far, so why do you want to get the books for free?
Just go to Amazon and buy a copy -> https://www.amazon.co.uk/gp/offer-li...1088692&sr=8-1

[chuubaba]

A member asked me abt calibration of my oscilloscope and i didn't know anything about it. Attached are pictures of my oscilloscope in calibration mod with its knobs in respective positions for the experts to see what are its calibration settings and how these translate the waves from Tx and Rx of my silent TGSL. Thank you ppl

[chuubaba]

your words make sense so let me make a post on my oscilloscope settings and Tx Rx readings and then i will wait for you to suggest the first free book/books from internet to read. Besides i know basic mathematics, geometry, physics, biology and chemistry and I have experience in plugging woofers direct in to 220v AC. i also have analog 20MHz oscilloscope and digital multimeter. I have arduino nanos and unos and breadboards and everything required to make a pcb plus three sets of components for TGSL, BARA, FFLEZJOO and KING COBRA... to help you recommend study material.... shall be very thankful

Start from the very beginning with the Dummy's Guide to Electronics. First try to understand passive components (resistors, capacitors and inductors) before moving on to semiconductors. Forget about the MD projects at the moment, and concentrate on learning the basics. You might say that you're in too much of a hurry, but trust me it will end up faster in the long run if you actually know what you're doing. Continuously blundering around will get you nowhere, except to end up even more confused than when you started. Wouldn't it be satisfying to be able to look at a schematic and understand what it means, rather than it looking like a foreign language?

[Qiaozhi]

I am learning from youtube videos on topics like soldering and testing components with multimeter how to attach pots veriables in a circuit etc but i am in too much hurry to build effective MD for justified reasons. at the moment four projects on table but none worked and i am yet to go into lengths of copper wires i purchased for coil building. how is the learning curve with electronics ?

Start from the very beginning with the Dummy's Guide to Electronics. First try to understand passive components (resistors, capacitors and inductors) before moving on to semiconductors. Forget about the MD projects at the moment, and concentrate on learning the basics. You might say that you're in too much of a hurry, but trust me it will end up faster in the long run if you actually know what you're doing. Continuously blundering around will get you nowhere, except to end up even more confused than when you started. Wouldn't it be satisfying to be able to look at a schematic and understand what it means, rather than it looking like a foreign language?

[Andi68]

Practicing helps.
Very important is the right temperature

[chuubaba]

i have a bit improved my soldering skills but still i am terrible

And soldering .....

[chuubaba]

I am learning from youtube videos on topics like soldering and testing components with multimeter how to attach pots veriables in a circuit etc but i am in too much hurry to build effective MD for justified reasons. at the moment four projects on table but none worked and i am yet to go into lengths of copper wires i purchased for coil building. how is the learning curve with electronics ?

Instead of blindly blundering around in such a random fashion, I would strongly suggest that you invest in a basic book on electronics, such as the Dummy's Guide that someone else suggested. Then things will become less of a mystery to you, and you'll be able to read schematic diagrams and start to understand more of what's being discussed in the forums. You need to learn how to swim before jumping in at the deep end.

[Andi68]

And soldering .....

[Qiaozhi]

have been busy with family. new child born. today i am back again. I attached LCD and ATMEGA to my felejoo that otherwise was giving good voltage readings is now a failure also as every voltage reading has significantly diminished. Even the LCD didnt light up

Instead of blindly blundering around in such a random fashion, I would strongly suggest that you invest in a basic book on electronics, such as the Dummy's Guide that someone else suggested. Then things will become less of a mystery to you, and you'll be able to read schematic diagrams and start to understand more of what's being discussed in the forums. You need to learn how to swim before jumping in at the deep end.

[chuubaba]

have been busy with family. new child born. today i am back again. I attached LCD and ATMEGA to my felejoo that otherwise was giving good voltage readings is now a failure also as every voltage reading has significantly diminished. Even the LCD didnt light up

We are waiting for chu to give us update on progress of his step by step TGSL, in the meantime we have popcorn and beer.

[chuubaba]

add a resistor 1k parallel to the speaker. then connect switch contacts to one of speaker wires you will disconnect it.

[chuubaba]

The terminology like FET etc gets my ears ringing. it is more convenient for me to understand maps like pcb diagrams to highlight relevant areas

Your TX waveform is excellent. The Rx is good too. I suspect problem is with the board. Maybe someone is faulty or layout or tracks is shorted somewhere. You can check the signal from the output of preamp and follow it along to the FET with scope all the way through. Then you will find the right place where problem exists.

[chuubaba]

Never. I bought all equipment for DIY MD. I have such level of experience that once i was very impressed by music from my friends woofers. thinking that buying woofers will produce similar music i bought best pair in the market and plugged them directly into 220V AC outlet

chuubaba:
Have you ever had any basic electronics training?
have you ever used a scope to repair an electronic device?

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Here is what my Oscilloscope described about Rx (top) and Tx (Down)
[ATTACH]43549[/ATTACH]

Your TX waveform is excellent. The Rx is good too. I suspect problem is with the board. Maybe someone is faulty or layout or tracks is shorted somewhere. You can check the signal from the output of preamp and follow it along to the FET with scope all the way through. Then you will find the right place where problem exists.