one transistor led flasher

one transistor led flasher

http://free-schematic.blogspot.com/2010/02/led-flasher-with-one-transistor.html

full schematic here

tl431 datasheet

tl431 datasheet

TL431/TL431A Programmable Shunt Regulator

Features

. Programmable Output Voltage to 36 Volts

. Low Dynamic Output Impedance 0.20 Typical

. Sink Current Capability of 1.0 to 100mA

. Equivalent Full-Range Temperature Coefficient of


50ppm/°C Typical
 
. Temperature Compensated For Operation Over Full Rated


Operating Temperature Range
 
. Low Output Noise Voltage
 
. Fast Turn-on Response
 
Description
 
The TL431/TL431Aare three-terminal adjustable regulator


series with a guaranteed thermal stability over applicable

temperature ranges. The output voltage may be set to any

value between VREF (approximately 2.5 volts) and 36 volts

with two external resistors These devices have a typical

dynamic output impedance of 0.2W Active output circuitry

provides a very sharp turn-on characteristic, making these

devices excel lent replacement for zener diodes in many

applications.
 
 

Internal Block Diagram

Test Circuits

 

download tl431 datasheet pdf

20W bridge amplifier for car radio used TDA7240A

20W bridge amplifier for car radio used TDA7240A

DESCRIPTION

The TDA7240A is a 20W bridge audio amplifier IC designed specially for car

radio applications.


Thanks to the low external part count and compactHeptawatt 7-pin power

package the TDA7240A

occupies little space on the printed circuit board.


download schematic diagram

str54041 datasheet

str54041 datasheet

Hybrid IC Voltage Regulator Module NPN Triple Diffused, for TV Switch Mode Power Supply

1 - features :
a . hyprid voltage regulator module  incorporated triple diffused planar transistir chips

b . transfer molded

c . for tv switch mode power supply

d . fixed output voltage

2 - equivalent circuit

1 - vout sense 
2 - base drive
3 - in put
4 - earth
5 - vo cont








download  str54041 datasheet  pdf

str50103 datasheet

str50103 datasheet

str50103 is a Voltage regulator

1- common

2- base drive

3- in put

4 - out put

5- vo control

download str50103 datasheet pdf

tda100 panasonic User Manual

tda100 panasonic User Manual

F.C.C. REQUIREMENTS AND RELEVANT


INFORMATION

1. Notification to the Telephone Company

This equipment complies with Part 68 of the FCC rules and the requirements adopted by the ACTA. On

the side of this equipment is a label that contains, among other information, a product identifier in the

format US: ACJMF03AKX-TDA100. If requested, this number must be provided to the telephone

company.

Installation must be performed by a qualified professional installer. If required, provide the telephone

company with the following technical information:

• Telephone numbers to which the system will be connected

• Make: Panasonic

• Model: KX-TDA100 and KX-TDA200

• Certification No.: found on the side of the unit

• Ringer Equivalence No.: 0.3A

• Facility Interface Code: 02LS2, 04DU9.BN/DN/1KN/1SN, METALLIC

• Service Order Code: 9.0F, 6.0P

• Required Network Interface Jack: RJ21X, RJ48C, RJ2HX

2. Ringer Equivalence Number (REN)

The REN is used to determine the number of devices that may be connected to a telephone line.

Excessive RENs on a telephone line may result in the devices not ringing in response to an incoming

call. In most, but not all areas, the sum of RENs should not exceed five (5.0). To be certain of the

number of devices that may be connected to a line, as determined by the total RENs, contact the local

telephone company. The REN for this product is part of the product identifier that has the format US:

ACJMF03AKX-TDA100. The digits represented by 03 are the REN without a decimal point (e.g., 03 is

a REN of 0.3). For earlier products, the REN is separately shown on the label.

3. Incidence of Harm to the Telephone Lines

If this equipment causes harm to the telephone network, the telephone company will notify you in

advance that temporary discontinuance of service may be required. But if advance notice isn't practical,

the telephone company will notify the customer as soon as possible. Also, you will be advised of your

right to file a complaint with the FCC if you believe it is necessary.

4. Changes in Telephone Company Communications Facilities, Equipment, Operations and

Procedures

The telephone company may make changes in its facilities, equipment, operations or procedures that

could affect the operation of the equipment. If this happens the telephone company will provide

advance notice in order for you to make necessary modifications to maintain uninterrupted service.

5. Trouble with this equipment

If trouble is experienced with this equipment, for repair or warranty information, please see the attached

warranty, which includes the Servicenter Directory. If the equipment is causing harm to the telephone

network, the telephone company may request that you disconnect the equipment until the problem is

resolved.

6. Connection to Party Line

Connection to party line service is subject to state tariffs. Contact the state public utility commission,

public service commission or corporation commission for information.
 
 
downloadKX-TDA100 panasonic User Manual

tda4605 datasheet

tda4605

CONTROL CIRCUIT FOR SWITCH MODE POWER SUPPLIES USING MOS  TRANSISTORS

DESCRIPTION


The IC TDA4605controls the MOS PowerTransistor and performs all necessary regulation and

monitoring functions in free running flyback converters.

Since good load regulation over a wide load range is attained, this IC is particularly suitable

for Consumer as well asIndustrial PowerSupplies.

Alternative source of theTDA4605 is alsoavail-

ablefrom SIEMENSS emiconductors Consumer ElectronicsA.G.

download tda4605 datasheet pdf

uln2003 datasheet

uln2003 datasheet

HIGH VOLTAGE AND HIGH CURRENT


DARLINGTON TRANSISTOR ARRAY

DESCRIPTION

The ULN2003 is a monolithic high voltage and high current

Darlington transistor arrays. It consists of seven NPN darlington

pairs that features high-voltage outputs with common-cathode

clamp diode for switching inductive loads. The collector-current

rating of a single darlington pair is 500mA. The darlington pairs

may be parrlleled for higher current capability. Applications include

relay drivers,hammer drivers, lampdrivers,display drivers(LED gas

discharge),line drivers, and logic buffers.

The ULN2003 has a 2.7kΩ series base resistor for each

darlington pair for operation directly with TTL or 5V CMOS

devices.

FEATURES

* 500mA rated collector current(Single output)

* High-voltage outputs: 50V

* Inputs compatibale with various types of logic.

* Relay driver application
 
download uln2003 datasheet

tda2822m datasheet

tda2822m datasheet

DUAL LOW-VOLTAGE POWER AMPLIFIER

SUPPLYVOLTAGEDOWNTO1.8V



.LOWCROSSOVERDISTORSION


.LOWQUIESCENTCURRENT


BRIDGEORSTEREOCONFIGURATION
 
 

DESCRIPTION


TheTDA2822M is amonolithic integrated circuit in

8 lead Minidip package. It is intended for use as

dual audio power amplifier in portable cassette

players and radios.
 
download  tda2822m datasheet

tda9341ps n3 a

TDA9341PS/N3/A Selling Leads, TDA9341PS/N3/A Datasheet PDF

tda9341ps n3 a

crystal radio parts

crystal radio parts


The Basic Crystal Radio is just this much:

                 
A coil, Variable capacitor to tune frequency, a crystal Diode and a High Impedance headphone, makes a crystal radio.  You require a very good antenna and good ground. The .001 capacitor is to remove radio frequency from signal & get audio only for phones.
 

In this project, I am using above circuit already, for those interested only up to this level. So that a crystal Radio remains a crystal radio in its original form. You have an option to use High Impedance earphone and listen this radio without power.

However, in addition to basic circuit, I decided to add some amplification for the very basic reasons that, it was hard to find a High Impedance earphones and second, it was more pleasant to listen to a radio thru a speaker. 

Crystal Radio Document 

download  

gmrs two way radio

ht1000 radio

VHF & UHF, 2 and 16 Channels

Radio hardware features:

• 2 and 16 Position Rotary Channel Selector with Stop
• 2 Programmable Side Buttons

Operator friendly controls and features include:

• Large Rotary Channel Selector
• Rotary On/OFF and Volume Control
• Accessory Connector for convenient access
• Battery Latch Lock
• Large Textured PTT
• Spring Action Belt Clip
• Rugged, Die-Cast Chassis
• 3 Programmable Option Buttons

Motorola HT1000
The HT1000 portable offers you a small, rugged, economically packaged radio with features never before offered in a Motorola HT portable product. In addition to size, durability, and affordability advantages the HT1000 radio offers, it also includes programmable function controls and radio-to-radio cloning for increased user flexibility.
The HT1000 radio is one of the loudest portables ever developed by Motorola. Improved voice intelligibility at high volumes means less distortion and fewer miscommunications. The radio’s standard noise canceling microphone will minimize background noise.
The HT1000 radio features Motorola’s broadest band range. With “Full Band VHF” a single model can operate from 136-174MHz. The entire UHF band is covered with 2 models, and the 800MHz band needs only one.
Channel scan monitoring allows the HT1000 to scan all of its operating channels. Channel scan is capable of scanning for PL, DPL, Carrier Squelch, Quick Call and Stat-Alert Selective Call, and be configured for Non-Priority or Single Priority operation. The HT1000 radio also includes Talk-back scan and nuisance channel delete and unwanted active channel from the scan list by simply pressing a button.
The HT1000 portable can be programmed to adjust RF power levels automatically on a mode slaved basis, or manually through operation of a switch. Variable RF power level provides the radio with the capability of having up to two power levels in one radio, and the capability of operating in high or low power on a per channel basis.
The HT1000 portable radio makes dedicated two-way communications faster, clearer, and easier to use. This small and lightweight radio breaks the notion that size and weight must increase as the portable grows in capability. Of course, the HT1000 radio family incorporates the quality and reliability you have come to expect from Motorola.

Motorola HT1000 Features

The HT1000 has the following features:

• Frequency flexibility offers a broad band range.
• Three Side Programmable Buttons
• Quick Disconnect Accessory Port
• Built to withstand harsh conditions in rugged environments.
• Rotary Channel Selector Knob
• Noise Canceling Microphone provide clearer audio even in noisy environments.
• Top Mounted Emergency Button
• Dual Charge High Capacity Battery
• Top-Mounted Bi-Color LED Indicator
• Programmable channel spacing in VHF and UHF lets you change bandwidths in 25 or
• 12.5 kHz systems.
• Wide range of signaling options.
• 3-Postion Programmable Toggle Switch

Motorola HT1000 Models

VHF

• H01KDC9AA1-N
  HT1000 VHF (136-178 MHz) 2 Channel 1-5Watt Portable Radio
• H01KDC9AA3-N
  HT1000 VHF 136-178 MHz 16 Channel 1-5Watt Portable Radio

UHF

• H01RDC9AA1-N
  HT1000 UHF 403-470 MHz 2 Channel 1-4Watt Portable Radio
• H01RDC9AA3-N
  HT1000 UHF 403-470 MHz 16 Channel 1-4Watt Portable Radio
• H01SDC9AA1-N
  HT1000 UHF 450-520 MHz 2 Channel 1-4Watt Portable Radio
• H01SDC9AA3-N
  HT1000 UHF 450-520 MHz 16 Channel 1-4Watt Portable Radio
• H01UDC9AA3-N
  HT1000 800 MHz (806-870 MHz) 16 Channel 1-4Watt Portable Radio

All Motorola HT1000 Models Include:
Standard Battery – (VHF/UHF NiCd 1200 MAh 7.5v)
Standard 120v Single Unit Slow Rate
Standard Antenna
2.5” Belt Clip
User Guide
1 -Year Warranty

Motorola HT1000 Applications

Public Safety
Mining
Petroleum

Motorola HT1000 Accessories

Expand your radios capabilities with Motorola Original accessories. Motorola HT Series portable radio accessories can turn your radio system into a custom communication system for your business needs. Adding the proper headsets, microphones, batteries, chargers, or carry cases can enhance the productivity of the people who use two-way radios. Motorola Original accessories are built with the highest quality standards and are specifically engineered to assure maximum performance of your radio, no matter what your profession.
Batteries
Motorola original b atteries with different chemistries to best suit your needs help keep your HT1000 radio fully functioning at all times, so you can rest assured they are ready whenever you need them.
NTN7143 NiCD Battery Standard Capacity 1200 mAh 7.5V
NTN7144 NiCd Battery High Capacity 1500 mAh 7.5V
NTN7146 NiCD Battery Standard Capacity (Intrinsically Safe) 1200 mAh 7.5V
NTN7147 NiCD Battery High Capacity (Intrinsically Safe) 1300 mAh 7.5V
Chargers
You need a charger to keep your batteries ready whenever you need them. Choose the Motorola Original charger that best fits your need.
NTN1168 Charger Desktop Rapid Rate 110V
NTN1171 Charger Rapid 1-Hour 110V
NTN1174 Charger Single 10-Hour
NTN1177 Charger Multi Unit Rapid (Six-Pocket)110V
Audio
Motorola original a udio accessories enhance your communication system. Remote speaker microphones offer the convenience of communication without having to remove the radio from your belt. Lightweight headsets provide hands- free communication so you can work and communicate simultaneously. Comfortable earpieces mute the radio speaker while channeling the audio directly to your ear, so you can monitor transmissions clearly and privately.
Remote Speaker Microphones
NMN6193 Remote Speaker Microphone
NMN6191 Noise Canceling Remote Speaker Microphone
NMN6228 30" Noise-Canceling Public Safety Speaker/Microphone
NMN6243 18" Noise-Canceling Public Safety Speaker/Microphone
NMN6244 24" Noise-Canceling Public Safety Speaker/Microphone
Earpieces
BDN6664 Receive Only Earpiece - Beige (requires BDN6676 adapter)
BDN6719 Ear Receiver with 3.5 mm Threaded Plug
BDN6780 Single Earbud with Microphone and PTT (requires BDN6676 adapter)
BDN6781 Single Earbud, receive only (requires BDN6676 adapter)
NMN6246 Earbud w/Boom Micr and in-line PTT (requires BDN6676 adapter)
Surveillance Accessories
The following surveillance accessories require the BDN6676D (3.5 mm threaded adapter jack) that attaches to the radio, unless being used with speaker/microphone.
BDN6664 1-wire Earpiece - Beige
BDN6726 1-wire Earpiece - Black
BDN6665 1-wire Extra Loud Earpiece - Beige
BDN6727 1-wire Extra Loud Earpiece - Black
BDN6666 1-wire Earpiece w/Volume Control
BDN6728 1-wire Earpiece with volume control - Black
BDN6667 2-wire Earpiece with combined Mic/PTT -Beige
BDN6729 2-wire Earpiece with combined Mic/PTT - Black
BDN6669 2-wire Extra Loud Earpiece with combined mic/PTT - Beige
BDN6731 2-wire Extra Loud Earpiece with combined mic/PTT - Black
BDN6668 3-wire Earpiece with separate Mic/PTT - Beige
BDN6730 3-wire Earpiece with separate Mic/PTT - Black
BDN6670 3-wire Extra Loud Earpiece with separate mic/PTT - Beige
BDN6732 3-wire Extra Loud Earpiece with separate mic/PTT - Black
NTN8370 Extreme Noise Kit provides 24 dB of noise reduction
NTN8371 Low Noise Kit; includes rubber Eartip for low noise
BDN6676 3.5 mm Jack Adapter with Quick Disconnect Latch
Headsets
NMN6245 Single Muff Lightweight headset (Requires BDN6676 3.5mm Adapter)
BDN6676 HT1000 Audio Access Adapter 3.5mm w/PTT
NMN1020 Lightweight Headset w/Boom Mic for Helmet (Requires BDN6676 Adapter)
NMN6258 Over the head with In-Line PTT
NMN6259 Behind the head with In-Line PTT
BDN6645 Heavy Duty Headset w/Boom Mic -24 dB (Requires BDN6673 Adapter)
BDN6635 Heavy Duty (VOX) Headset w/Boom Mic (Requires BDN6673 Adapter)
BDN6636 Heavy Duty (VOX) Headset w/Throat Mic (Requires BDN6673 Adapter)
BDN6673 Radio Adapter Cable
Ear Microphones
Voiceducer
BDN6708 Ear Microphone Interface Module for PTT Only
BDN6671 Ear Microphone Interface Module for PTT & VOX
BDN6641 Ear Microphone for up to 105dB - Grey
BDN6677 Ear microphone for up to 95 dB - Black
BDN6678 Ear Microphone for up to 95dB - Beige
0180358B32 Ear Microphone Earholder Black - Small
0180358B33 Ear Microphone Earholder Black - Medium
0180358B34 Ear Microphone Earholder Black - Large0180358B35 Ear Microphone Earholder Clear - Small
0180358B36 Ear Microphone Earholder Clear - Medium
0180358B37 Ear Microphone Earholder Clear - Large
0180300E25 Ear Microphone Earguard with Adjustable Loop
0180358B38 Ear Microphone Push-to-Talk Ring Switch
0180300E83 Ear Microphone Push-to-Talk Body Switch
4280369E44 Ear Microphone Belt Clip
CommPort
NTN1625 CommPort Integrated System with PTT on Radio
NTN1624 CommPort Integrated System with Palm PTT (IS / FM)
NTN1663 CommPort Integrated System with Ring PTT (IS / FM)
NTN1737 CommPort Integrated System with Snap-on-Side PTT (IS / FM)
NNTN4187 CommPort System with Body PTT Button
AAHLN9717 Audio Accessory Adapter 3.5MM
Carry Accessories
Motorola original c arry cases in both nylon and leather protect your radio and provide you the freedom from holding it during standby communication. Designed with comfort and convenience in mind, these cases come in a variety of sizes and styles to fit nearly any professional application.
HLN6602 Universal Chest Pack
NTN8037 Leather Carry Case with 3" Swivel (for use with high capacity battery)
NTN8038 Leather Carry Case with 3" Swivel (for use with ultra-high capacity battery)
NTN7247 Nylon Carry Case with Belt Loop
4205638V09 Spring Action Belt Clip 2.5” (Standard with Radio)
Antennas
A variety of antennas available for the Motorola HT1000 radio offer you flexibility in size and calling range. As with all of our parts and accessories, these HT1000 antennas are all Motorola Original.
VHF
8505644V01 VHF (136-150.8 MHz) Helical Antenna
8505518V01 VHF (136-150.8 MHz) Wideband Helical Antenna
VHF (150.8-162 MHz) Helical Antenna 8505644V02
VHF (136-150.8 MHz) Helical Antenna 8505644V01
VHF (162-178 MHz) Helical Antenna 8505644V03
UHF
8505644V04 UHF (403-435 MHz) Helical Antenna
8505644V05 UHF (435-470 MHz) Helical Antenna
8505644V06 UHF (470-435 MHz) Helical Antenna
8505241U05 UHF (403-520 MHz) Whip Antenna
800 MHz
NAF4000 800 MHz (806-870 MHz) Dipole Antenna
8505241U06 800 MHz (806-941 MHz) Stubby Antenna
8505241U03 800 MHz (806-870 MHz) Stubby Antenna

Download

Motorola HT1000 Spec Sheet

two way radio batteries Motorola

2 way radio batteries

two way radio batteries Motorola

Mobius	53615	56318
Astro	AX Series	cosmo
CP100	CP125	CP150
CP200	CP250	CT150
CT250	CT450	CT450LS
EX500	EX600	Expo Light Duty
GP68	GP320	GP340
GP350	GP360	GP380
GP640	GP680	GP900
GP1200	GP1280	GP2000
GTX Series	Handi Com	HKNN4002A
HT50	HT90	HT210
HT220	HT220 Omni	HT220 Slimline
HT440	HT600, HT800	HT750
HT1000	HT1250	HT1550
JT1000	KEBT-071-A	KEBT072
Lingo L3000	LTS2000	M370H1A
Mag One BPR40	MH10, MH70	Minitor II
MT500 Omni	MT500 Slimline	MT700
MT1000	MT2000	MTS2000
MTX638	MTX800, MTX900	MTX850, MTX850LS
MTX950, MTX960	MTX8000, MTX9000	MTX8250LS, MTX9250
MTZ2000	MX300 Series	MX800
NLN8096A	NTN5448A	NTN9395A
P200	P210	PR400
PR1500	PRO2150	Pro3150
PRO5150	PRO5150 Elite	PRO7150, PRO9150
PTX600	R750	Radius GP300
Radius GP600	Radius HT10	Radius P10
Radius P50	Radius P100	Radius P110
Radius P200	Radius P210	Radius P1225
Radius P1325	Radius SP10	Radius SP50
Saber	Saber / Astro Saber MX1000	Saber / Astro Saber MX2000
Saber / Astro Saber MX3000	Saber MX1000	Saber MX2000
Saber MX3000	Spirit	Spirit GT
Spirit SU42	Spirit SV52	STX
SX700	T4800	T4900
T6000 Series	T6200	T6210
T6220	T6300	T6310
T6320	Talkabout 5950	Talkabout FV500
Talkabout T5320	Talkabout T5400	Talkabout T5410
Talkabout T5420	Talkabout T5800	Talkabout T5820
Talkabout T5900	Talkabout T6000 Series	Talkabout T6220
Talkabout T6500	Talkabout T6530	Talkabout T7100
Talkabout T7400	Visar	XTN Seres
XTS1500	XTS2500	XTS3000
XTS3500	XTS5000	XU Series
XV Series	TalkaboutT-5410

more info