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/diy/ - Do It Yourself

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File: 5 KB, 348x332, 1transcm.gif [View same] [iqdb] [saucenao] [google]
28496 No.28496 [Reply] [Original]

>dat circuit

ITT: we post useful circuit schematics we'd like to share with others

>> No.28505

another transmitter

>> No.28509
File: 2 KB, 330x269, simplest-rf-transmitter.gif [View same] [iqdb] [saucenao] [google]
28509

>>28505

>derp

forgot pic

>> No.28517
File: 71 KB, 932x719, Schematic.gif [View same] [iqdb] [saucenao] [google]
28517

charlieplex

>> No.28522
File: 17 KB, 696x863, univox schematic.gif [View same] [iqdb] [saucenao] [google]
28522

Distortion pedal

>> No.28533

Could someone dump a wireless sender-receiver schematic?

>> No.28534
File: 134 KB, 740x952, circuit_diagram.png [View same] [iqdb] [saucenao] [google]
28534

so funny

couldn't resist

>> No.28536
File: 8 KB, 575x315, 03320.png [View same] [iqdb] [saucenao] [google]
28536

>> No.28540

>>28534

>dat solder blob

>> No.28541

OP posted FM transmitter?

>> No.28547

>>28534
>hire someone to open and close switch real fast
munroe might be an aspie, but i can't deny that xkcd is really good sometimes

>> No.28551

>>28541

no, building an fm transmitter is illegal

so don't build it

>> No.28562

>>28551
>>28551

Why is that illegal?

>> No.28565
File: 573 KB, 1920x2499, Heath2.jpg [View same] [iqdb] [saucenao] [google]
28565

>>28551
Not necessarily. With no license, you're allowed to build transmitters on the microwatt level under Part 15 regulations.

If you possess a valid amateur radio license, in the United States, you may build transmitters on designed frequencies upto 1.5 kw output.

>> No.28569
File: 756 KB, 1920x2505, Heath3.jpg [View same] [iqdb] [saucenao] [google]
28569

>>28565
>*designated frequencies

Here is the theory of operation for that schematic.

>> No.28571

>>28565

that is OG right there

>> No.28573

>>28562

small fm transmitters fall under the category of "bugs" under US federal law.

I'm pretty sure it's just a technical thing unless you actually use it as a bug, but then agian in today's political climate I'll probably have my door kicked in by the SEE I Ay and be shoot execution style for posting it.

>> No.28587

>>28573

That's pretty funny, considering we have this really elaborate spy shop over here in Amsterdam. They've got the works.

>> No.28593

>>28573
Is there a similiar law about transmiters in european country's?

>> No.28592

>>28587

Do you have a schematic depicting a wireless sender and receiver? I wanna build me a remote control for the lights.

>> No.28591

>>28551
>>28562
I don't know what country you're in, but low-power FM transmitters are very legal here in the U.S., so long as they don't interfere with existing broadcast stations. Cheap wireless microphones and car-radio transmitters for your iPod all use the FM broadcast band.

>> No.28595

>>28593

don't know bro

I'm not European

>> No.28602

>>28593

I'm in Holland >>28587, and as far as I know, the laws are similar to those in the US, as long as you don't mess with official/commercial frequencies.

>first year law, so I could be wrong.

>> No.28603
File: 944 KB, 1920x2502, Heath4.jpg [View same] [iqdb] [saucenao] [google]
28603

>> No.28605

>>28591

yes, and they're regulated under a commercial classification but small homemade FM transmitters are not.

>> No.28609

>>28534
I can actually find the equivalent resistance of the messy resistor network. Keyword: delta to Y and Y to delta

>> No.28612
File: 962 KB, 1920x2499, Heath5.jpg [View same] [iqdb] [saucenao] [google]
28612

>>28593
Get your amateur radio license, every country in the world offers one. Thank you ITU.

>> No.28621
File: 859 KB, 1920x2499, Heath6.jpg [View same] [iqdb] [saucenao] [google]
28621

>> No.28617

>>28593

Yes. Your (legal) options are:

a) using ridiculously low output power
b) using some ISM band
c) using extremely high frequencies
d) getting an amateur license and using the allocated amateur frequencies

>> No.28630

>>28617

you forgot e) fuck da po'lice

>> No.28637

>>28630

Fukin da puhleez isn't legal.

>> No.28639

I really want to get into Electronics, is there any decent starter sources? (Textbooks, websites ect)

>> No.28658

>>28639

seconding this

>> No.28740

bump

>> No.28761

EE here. I find discrete electronic circuits quite boring.

>> No.28771

>>28639
Art of Electronics by Horowitz and Hill
Old school text book but literally everything. Tries to use maths only when you really need to.

Electronic Fundamentals by Floyd
Much more user friendly, starts from ground up. Includes Multisim circuits if you can get a copy of that software. Highly recommended.

Digital Fundamentals by Floyd

>> No.28774

>>28761

Feel free to list nice ICs, then.