TDA2822 Bridge Amplifier - Page 1
Forum section: electronics / beginners

author: MasonMSTY
author_rank: Newbie
timestamp: January 23, 2016, 08:45:10 pm
content: i am planning on building a amp based on the TDA2822M chip. I am new to electronics and trying to lean to read schematics and thought that this would be a good project to start on. the only problem i am having is there is no speaker in the schematic so i do not know where to hook my speaker up at.

author: Simon
author_rank: Unknown
timestamp: January 23, 2016, 08:55:22 pm
content: The speaker is represented by RL

author: MasonMSTY
author_rank: Newbie
timestamp: January 23, 2016, 08:59:50 pm
content: Okay Thanks. Thats what i was thinking but i just wanted to make sure before i started making it.

author: Audioguru
author_rank: Super Contributor
timestamp: January 23, 2016, 11:40:39 pm
content: The TDA2822M is obsolete and is not made anymore. The two largest electronic parts distributors in USA do not have any. It was small and it overheated easily.The LM386 amplifier IC is still made and is available everywhere.

author: Zero999
author_rank: Super Contributor
timestamp: January 24, 2016, 09:30:10 am
content: Quote from: Audioguru on January 23, 2016, 11:40:39 pmThe LM386 is not a replacement for the TDA2822.The NJM2073 seems pretty decent though.http://www.njr.com/semicon/PDF/NJM2073_E.pdf

author: stoica adrian
author_rank: Contributor
timestamp: January 24, 2016, 10:45:42 am
content: Hello,In my opinion if you are a beginner in electronics, you should try to make an amplifier with transistors, you have a lot to learn from there. I suggest you this headphone amplifierhttp://www.circuitstoday.com/few-transistor-amplifier-circuits#headphoneEnjoy

author: mikerj
author_rank: Super Contributor
timestamp: January 24, 2016, 01:29:21 pm
content: Quote from: Audioguru on January 23, 2016, 11:40:39 pmJust FYI, production of thegenuine LM386is being stopped later this year.

author: wraper
author_rank: Unknown
timestamp: January 24, 2016, 01:50:04 pm
content: Quote from: stoica adrian on January 24, 2016, 10:45:42 amTBH building low power transistor amp is nearly useless if going to actually use it, something with at least a few tens of watts is another story. By the way, all of the circuits from your link suck (if you are going to actually listen them).

author: picandmix
author_rank: Frequent Contributor
timestamp: January 24, 2016, 05:35:01 pm
content: Quote from: MasonMSTY on January 23, 2016, 08:45:10 pmThen I would suggest you get one of these LM386 amplifier kits widely sold on ebay, and you might find someone stocking them in your country; cheaper than buying the parts separately and includes a pcb and volume control.If you can to improve things with a pre amp then plenty of good circuits here.http://sound.westhost.com/project02.htm

author: Zero999
author_rank: Super Contributor
timestamp: January 24, 2016, 06:32:56 pm
content: Quote from: mikerj on January 24, 2016, 01:29:21 pmThere are clones around. Try the NJM386.http://www.njr.com/semicon/PDF/NJM386_E.pdfBy the way, I'm no New Japan Radio shill but I've got some of their copy of the NE5532 and they've quite good and were cheaper from RS Components.

author: Audioguru
author_rank: Super Contributor
timestamp: January 24, 2016, 06:36:50 pm
content: It looks like American companies are not making though-hole DIL ICs anymore. also, now that TI bought National then the foundry that made LMxxx parts might also be gone.

author: Zero999
author_rank: Super Contributor
timestamp: January 24, 2016, 07:23:13 pm
content: Quote from: stoica adrian on January 24, 2016, 10:45:42 amIt depends on what you want to learn? If it's just a bit of soldering practise, an LM386 amplifier is perfect.As mentioned above those circuits on that website aren't very good.

author: stoica adrian
author_rank: Contributor
timestamp: January 24, 2016, 08:47:24 pm
content: Well, if you just solder some components on a pcb using a schematics, and at final everything works thats great. But what you have learn? to solder yes, to recognize a schematics and components yes, but for me it's more like making a kit. You have more to learn when you make things that do not work, and then you scratch your had to work. But at the end depends what satisfy you