Any location

/ Change location

Philippines Free Classifieds

Help | Registration

MySpace

Del.icio.us

Digg it!

Live Journal

Reddit

Technorati

Yahoo! bookmarks

Google bookmarks

Stumble it!

Home

Cars

Real Estate

Post FREE ad

Manila > Electronics > Cellulars

]-For Sale : Speech Amplifier Box - Php1,499

Click to enlarge

Description.
This circuit given here can be housed in the box containing the speaker to form a handy microphone amplifier.The device can be used by teachers, guides, lecturers etc for speaking in a crowdy or noisy environment.

The circuit is designed base on the audio power amplifier IC TDA 7052.The IC can deliver a maximum power output of 1.2 W at a 6V supply.The audio signal from the microphone is pre amplified by the amplifier based on Q1 (BC 547) and give to the input of IC1 (pin 2).The POTR5 acts as a volume control.The capacitor C3 is used to bye pass the upper frequencies in order to avoid the Larsen’s effect(the microphone picking up speaker output to cause howls).

Notes.

* Use a 8 Ohm speaker or two 4 Ohm speakers in series as load.
* Assemble the circuit on a good quality PCB or common board.
* A 6V SMF battery is my choice for powering the circuit.
* Switch S1 can be used as a ON/OFF switch.

Color available : Black

SHIPPING POLICY:
1. SHIPPING FEE MUST BE HANDLED BY THE BUYER. (Shipping cost will vary on the weight of the item/s)
2. SETTLE YOUR AMOUNT/PAYMENT AT LBC.
3. TRACKING NUMBER WILL BE SEND THRU SMS.
4. OFFICIAL CARRIER AIR21 or LBC
5. Shipping schedule everyday except Sunday and Holidays.

for more info just visit
www.cebucoolestgadgets.multiply.com

Price: 1499php
Contact # 09474306012/09471654874

User-135692 (Manila)

E-mail

10/19/2011 #169392

Philippines electronics free classifieds

For Sale : Speech Amplifier Box - Php1,499

For Sale : Speech Amplifier Box - Php1,499

Manila

Description. This circuit given here can be housed in the box containing the speaker to form a handy microphone amplifier.The device can be used by ...

Offering: Apple iPhone 4S (16GB/32GB) Brand New Unlocked - Php20,000

Canlaon

Brand New Apple Iphone 4S (16GB/32GB) Sony PS2, PS3 Xbox 360 Wii PSP 3DS Black Berry, Apple iPhone / Apple Ipad/HTC PHONE We have all ...

Mercedes-Benz R class W251 R280 R320 R350 R500 radio DVD GPS TV CAV-8070RW

Mercedes-Benz R class W251 R280 R320 R350 R500 radio DVD GPS TV CAV-8070RW

Caloocan

Mercedes-Benz R class W251 R280 R320 R350 R500 radio DVD GPS TV CAV-8070RW DVD GPS Navigation special for Mercedes-Benz R class W251 R280 R320 R350 ...

Get the most affordable deals at MyBestValue.ph

Get the most affordable deals at MyBestValue.ph

Makati

MyBestValue.ph where people can find and buy best quality type of home electronics, gadgets, appliances and more. For more info about promos and freebies visit: ...

SAMSUNG UA55C9000 55 inches (140 cm) Full HD 3D TV Series 9 LED Samsung - Php2,000

SAMSUNG UA55C9000 55 inches (140 cm) Full HD 3D TV Series 9 LED Samsung - Php2,000

Alaminos

Galaxy Trade Electronics, Distributor we are one of the leading Electronics, Distributor. We are recognized distributor of various consumer electronics we sell latest brand and ...

© Advertising agency MM4, 2004 | Help | Contact Us | Registration | Privacy Policy | Term of Use