SANKIT Speaker Ptotector

SANKIT Speaker Ptotector

tone control tl072 from Elliot

i found this scheme... the initial ESP = Elliot sound Project ?
i have one IC tl072 so i would like to build this scheme..
scheme :

Prototype :
not yet.
Photo :
none

old Amplifier LA4505 from sanyo Semiconductor

did you have this old IC ?... i rebuild this stuff, just replace dried Capacitor.. and yes ..!! still ALIVE !!!
Schema
Protoboard
believe me it's works, someday i upload that board :-)

Mini Amplifier USB Powered 5 Volt - 2N4401

SKema
here PCB Design by friend, thanks for Dudung.

Amplifier la4440

Scheme :

this is old and original from sanyo datasheet.. so if you want to try it, buy it and build it :-)

protoboard :
not yet uploaded, next time i will upload my protoboard . i don't promise :)
result:
good,.. this is caled "compo amplifier", cause has compact figure box, small enough and able use batterai 12V
the IC produce heat, please use a good heatsink.

VU LED Meter LB 1403

IC dari sanyo ini lumayan sederhana , menampilkan kekuatan sinyal dengan lima LED. ngga usah banyak cerita nih aku udah bikin..

the scheme


Mau tahu bagaimana Bottomwire nya?.. ini dia..

mic wireless FM

http://karyasolderanku.blogspot.com/2011/04/mic-wireless-fm-si-penyadap-canggih.html
http://karyasolderanku.blogspot.com/2012/03/wireless-fm-si-penyadap-nongol-lagi-ii.html
http://elektronikanalog.blogspot.com/2013/02/vhf-fm-wireless-microphone_26.html

classic car amplifier la 4440

Background

I just search over internet and I found the scheme of LA4440 Amplifier.
Using Output Capasitor 1000uF to pass the AC signal and blok DC signal go trough Speaker. Contains two OP AMP, so can design as stereo power amplifier. Above the scheme it's normal configuration for two speaker (stereo) 6 Watt each. also able to design as BTL Amplifier bellow scheme). You can see here only one speaker. It means two Op-Amp configured into a couple OP-AMP to push pull the speaker. REMEMBER DO NOT Connect any wire of Speaker to Ground in BTL configuration.

Design Scheme

Here the source scheme from electronica.ro

Prototype PCB

Here the Old PCB design I bought from Saturn Product. daurulang means recycled :-). I need only Amplifier part so i cut this board, sorry...

Perhaps some day I will Upload the Images which containt full fill part.

Amplifier using TIP31c

i had built an amplifier mini for my living room. use two TIP31c, in boxcase says it's 30x2 (stereo). need Transformer 3A 25VCT.

Absolute Maximum Ratings Transistor TIP31

VCBO Collector-Base Voltage :
TIP31 40V
TIP31A 60V
TIP31B 80V
TIP31C 100V

Collector-Emitter Voltage :
TIP31 40V
TIP31A 60V
TIP31B 80V
TIP31C 100V

Emitter-Base Voltage 5 V
Collector Current (DC) 3 A
Collector Current (Pulse) 5 A
Base Current 1 A
Collector Dissipation (TC=25 C) 40 W
Collector Dissipation (Ta=25 C) 2 W
Junction Temperature 150 C
Storage Temperature - 65 ~ 150 C

skema

sumber dari Afiata

sub woofer TL 072

Little Story

Usually I works in a full day only 8 hours, but here @ my office, it's almost 16 hours ..
hmm.. so tired,..almost no time for research... :p
Scheme


Prototype
not yet. I plan to fix my broken Speaker computer.
Photo:

Mosquito Repellant

I find Mosquito Repellant circuit from Graham Maynard.
Consisting of a phase locked loop (CMOS 4047) wired as a 22KHz oscillator,
The output is further amplified by a pair of complimentary output transistors and drives 3.25 inch Piezo.

amplifier scheme

power-amplifier.blogspot.com/

just visit this blog

Elliot Sound Project

http://sound.westhost.com/
Rod Elliot Sound Project, many scheme here, go visit his page.
i copy this link to my blog for personal use only. i will re-design it to fit in my tinybox. the art of electronic is drawing the PCB :-).
so Do It Yourself, buy the parts, heat with ironsolder, and enjoy electronic hobby...

also he has the Notice :

Copyright Notice. This article, including but not limited to all text and diagrams, is the intellectual property of Rod Elliott and National Semiconductor, and is Copyright © 2001. Reproduction or re-publication by any means whatsoever, whether electronic, mechanical or electro-mechanical, is strictly prohibited under International Copyright laws. The author (Rod Elliott) grants the reader the right to use this information for personal use only, and further allows that one (1) copy may be made for reference while constructing the project. Commercial use is prohibited without express written authorisation from Rod Elliott.

4 LED VU meter LM324

Get Inspire from circuit-electronic.blogspot.com by Tom.
thanks provide us scheme electronic circuits. I want make cheaper, small and humble Audio LED VU Meter. I think that scheme is simple.
I bought IC LM324 only 1500rp (if 1USD=10.000rp so it's 0,15 USD ?)

tone control

i search scheme, and i found tone control. nice, i will build it.
http://circuit-electronic.blogspot.com

4 Watt audio Amp TIP41

here another mini amp

repair sanyo 4505 miniamp

I got mini amp from my bro, hmm it is very old stuff. i must re-build again. poor the PCB , cause pre amp part is cut off. hmm.. nevermind, it is become more small. Fit in my box :-) so i must search scheme again to figure the partlist. here the scheme. i got from www.electronica.ro
Thanks.

Volume Control 4066

Replace than old mono Variable Resistor with digital one. yes i wish i can create an digital Volume COntrol. i bought IC 4066 it's Quad Switch. use R2R Ladder to make some Bridge. For example the level is 0000 binary (all switch off) the output are 0% when all switch on (1111 binary) then the output 100%. We need some Count Up and Count DOwn IC to produce 0000..1111 binary counter. Use 40xx family IC, can use in wide voltage 3,6,12V. the PCB must not over 3x3cm (two IC) with two button, 4 LED binarycode id.

Can you figure out? What about that scheme? come on quick design it, create it and get the photo. put on your web site . then notice me on comment page :-)
Scheme
here the scheme from trensains.com

Audio Clip Player 1999

When i googling, i found this old scheme (I re-draw for clarity scheme) about audio clip player. from Alan nishioka ( http://www.nishioka.com ) it uses IC 555 timer, IC 4040 counter, IC EEPROM 27512, ResistorLadder DAC, and Mini Amplifier with 324 OP AMP to produce audio clip. hmm.. cute, i wish it can put on my bicycle to promo ice cream, bread, etc. Look like ringtone, ups i mean audiotone.

What about the wave data ?
Try to make from 8bit-mono *.wav file, use any audio converter (ex: winamp waveout) to convert from mp3 to wav. THe calculation, if use 8000hz sampling-rate and 64KB ROM so only 65536 byte / 8000 byte = 8 second !!! hmm...enough to say several word. for promo audio clip ?? see more his project at http://www.nishioka.com

how to re-presentate the percent. of duration ?
Use IC 4017.
input clock from A10 then lets the 4017 calculate the duration every 10% (4017 have 10 led or ) after 10 steps (or 8 steps in A11,A12,A13?) i will back to first led.
i Think it's cool behavior act like Knightrider LED.

Tone Control Schematic

Hmm.. after walk around at google, search something like that
tone control ! to complete my 60W Power amplifier.
yeah that and old amplifier that my big bro give 2 me
u can visit other electronic scheme at
www.uashem.com