LM386N overheating - Page 1
Forum section: electronics / beginners

author: Charlie86
author_rank: Regular Contributor
timestamp: June 14, 2019, 07:26:40 pm
content: Hi,Just bought spy headset from eBay.https://www.ebay.com/itm/New-Invisible-Hidden-Wireless-Secret-Spy-Ear-Earphone-Earpiece-For-Mobile-Phone/392274810598?_trkparms=ispr%3D1&hash=item5b556696e6:g:JVEAAOSw7a9crbiK&enc=AQADAAAB0KX%2FKt4E1xf3SDqEdBclaYaW3Ca57aXq5FgKkvv3CBQ3Vn34fUOxbIq7ljGZ83F3tV4ULvmkKSrk3YncJFTBTDBByZmH0dKQf4KUjht2cYNxjFgTXtLM3mOM4TWyCE5k6JVX5Jd535ff24Nf%2BhDGlegRJrw1wbEYcwQITRrW87NNsHS47ttNZkAOcdjECFfIZxFCcy0pvndESDKfGCDwWyl4pxqCezAXvz1rgwX6QpmoTFBK%2F0l3igGTnEtvPZvyMnh5FJRxOMW73WGQ4cu4bzKA9lcBOFEKFGl8jnYMVngDzvVQrR1iTTxhJdgiCw1A%2BkDM%2FQCBQiA9p41an%2FM9DzDwGtrZvMF0btzUGCMaGCcgwVQoikDauoP0VjW7G8T4d9e%2BTfoBk2F9gLUul3J%2BkRxiVxjOliyWKyn1Q63iH2CRDiiyCe9fFbu88CyoWmzeqojzIuoYq%2BPgBSobczqXOYfnxegi7tVuDiyc8TaLHXXG18y%2FO6%2F7WDfqXFZTS1n5Ad1Pb67T5GeJf6RuLpzTWu6bfoXpxVOvLRT9Zj3eGKMesQgSMs04QMEQmYUCQW39iaQAM3l9RrAY%2FOCj%2BvU5n0zSo7BiZK5TQ%2BbHYTw5cScn&checksum=392274810598b826832d60784586aa42ea75a505a17bIt works for one minute then it overheats. If I stick heatsink on it then it works for aprox. 5 min.How can I change gain so it will not overheat?

author: Gyro
author_rank: Super Contributor
timestamp: June 14, 2019, 08:56:50 pm
content: It's probably doing you a favour - you wouldn't catch me putting one of those things up againstmyeardrum!I think it needs relocating to the dodgy as hell ebay items page.

author: malagas_on_fire
author_rank: Frequent Contributor
timestamp: June 14, 2019, 10:55:06 pm
content: It's not worth one important and delicate sense .if it overheats it reminds the game excitebike when leaving the accelerator pressed.Just use a tiny mp3 player with mic because they are almost forgoten.

author: Audioguru
author_rank: Super Contributor
timestamp: June 15, 2019, 02:13:22 am
content: It is a stupid idea to place a magnet against your eardrum that is designed to have only air against it.Why is it so important to have the earphone hidden?

author: xrunner
author_rank: Super Contributor
timestamp: June 15, 2019, 02:18:00 am
content: Quote

author: golden_labels
author_rank: Super Contributor
timestamp: June 15, 2019, 03:56:58 am
content: Prepare money to pay for a visit to a otorhinolaringologist after that thing gets stuck in earwax.Good advise:do not try to remove it by yourself if it is stuck. Don’t worry, the doctor will not be surprised — they are used to removing strange things from various holes in human body.As for the amplifier (I assume LM386N is there): we can say nothing without the schematics. But a blind guess: if it is powered directly from the batteries, it is lkely outside rated supply voltage. They supply over 19V, while absolute maximum is typically 15V.

author: malagas_on_fire
author_rank: Frequent Contributor
timestamp: June 15, 2019, 10:43:02 am
content: Another thing is that there is no LM386N overheating at all.... is the ear gadget ...and dramatic as opinions may look they are to protect you're ears. It may trap the ear channel where waves that travels through cerumem to the drum. Search for anatomy of ear and check out .Also search for instructions regarding ear protections such as used on swimming pools or the spongy ones, they clearly warn about how long it should be placed inside the hear and these are not burning devices. The same aplies for its removal ...

author: Zero999
author_rank: Super Contributor
timestamp: June 15, 2019, 02:53:14 pm
content: My advise is don't use it. Putting a magnet on your eardrum is a very stupid and dangerous idea.Use this device for educational purposes only. Take it to bits, reverse engineer the schematic and learn how it works. Once you've done that, salvage any parts which you find useful and throw the rest in the bin!