Eletronics 4U

2 – Tone Door Bell

 

 

PARTS LIST

Resistors (all ¼-watt, ± 5% Carbon)

R_1, R₂, R₈, R₁₀ = 4.7 KΩ

R₃, R₄, R₅, R₆, R₇, R₉ = 10 MΩ

R₁₁ = 33 Ω

Capacitors

C₁ = 0.001 µF

C₂ = 0.22 µF

C₃, C₄ = 0.047 µF

C₅ = 100 µF/16V

C₆ = 120 pF

C₇ = 150 pF

C₈ = 10 µF/16V

Semiconductors

IC₁ = CD40106

D₁ – D₅ = 1N4148

T₁ = SK100

Miscellaneous

SW₁ = Push to on switch

LS₁ = 8 Ω

Advance Burglar alarm from dual-op amp

PARTS LISTS

Resistors (all ¼-watt, ± 5% Carbon)

R₁, R_­4 = 10 KΩ

R₂ = 20 KΩ potentiometer

R₃ = 39 KΩ

Capacitors

C₁, C₃ =0.1 µF

C₂ = 100 µF

C­₄ = 0.05 µF

Semiconductors

IC₁ = MC1458 dual op-amp

IC₂ = LM380 audio power amplifier

Miscellaneous

8Ω 1-W speaker

Microprocessor based home security system

PARTS LIST

Resistors (all ¼-watt, ± 5% Carbon)

R₁, R₂ = 5.6 KΩ

R₃, R₁₆, R₁₈ – R₂₂, R₂₅ = 4.7 KΩ

R₄ = 100 Ω

R₅ = 3.9 KΩ

R₆, R₈, R₁₂, R₁₅, R₁₇ = 1 KΩ

R₇, R₁₀, R₁₁, R₁₃, R₁₄ = 10 KΩ

R₉ = 100 KΩ

R₂₃ = 120 Ω

R₂₄ = 470 Ω

VR₁ = 47 KΩ

VR₂ = 10 KΩ

Capacitors

C₁ = 3.3 nF ceramic disc

C₂, C₆, C₁₃, C₁₄ = 0.1 µF ceramic disc

C₃, C₈ = 0.01 µF ceramic disc

C₄ = 1 nF ceramic disc

C₅ = 10 µF, 25V electrolyte

C₇ = 2.2 µF, 25V electrolyte

C₉ = 10 µF, 10V electrolyte

C₁₀, C₁₁ = 10 pF ceramic disc

C₁₂ = 1000 µF, 50V electrolyte

Semiconductors

IC₁ = NE555 (timer IC)

IC₂ = µA741 (operational amplifier)

IC₃ = LM567 (Phase-Locked-loop)

IC₄ = 8085 (Microprocessor)

IC₅ = 2732A (EPROM 4k)

IC₆ = 64LS373 (Octal Transparent Latch)

IC₇ = 8255 (programmable peripheral interface)

IC₈, IC₉ = MCT2E optocoupler

IC₁₀ = 74LS00 (NAND gate)

IC₁₁ = 7809 (9V regulator)

IC₁₂ = 7812 (12V regulator)

T₁, T₃ – T₉ = BC548 (NPN transistor)

T₂ = L14G1 (Phototransistor)

D₁ = 1N4148 (Switching diode)

D₂ – D₁₀ = 1N4007 (rectifier diode)

LED₁ – LED₃ = Red LED

IR LED₁ = Infrared Led

Miscellaneous

X₁ = 230V/50 Hz or 110V/60 Hz AC primary to 12V-0-12V, 300 mA secondary transformer

X_TAL = 3.5 MHz crystal

SW₁ = Push-to-on switch

SW₂ = On Off switch

RL₁, RL₂, RL₄, RL₅ = 12V, 200 Ω, 1C/O relay

RL₃ = 12V, 200 Ω, 2C/O relay

simple FM transmitter

PARTS LIST

Resistors (all ¼-watt, ± 5% Carbon)

R₁ = 180 KΩ

R₂ = 10 KΩ

R₃ = 15 KΩ

R₄ = 4.7 KΩ

Capacitors

C₁ = 10 KPF

C₂ = 10 PF

C₃ = 20 KPF

C₄ = 0.001 µF

C₅ = 1 µF/10V

C₆ = 4.7 PF

C₇ = 10 KPF

C₈ = 3.3 PF

VC₁ = 22 PF

Semiconductor

T₁ = BF194B

Miscellaneous

MIC₁ = Condenser mike

L₁, L₂ = 3 turns of 22 SWG wire around any thin pencil

L₃ = 2 turns of 22 SWG wire around any thin pencil.

Simple and powerful F.M. Receiver

PARTS LIST

Resistor (all ¼-watt, ± 5% Carbon)

R₁ = 820 Ω

Capacitors

C₁, C₂ = 4.7 µF/35V

C₃, C₅ = 470 PF

C₄ = 22 PF

C₆ = 0.02 µF

C₇, C₁₀ = 0.01 µF

C₈, C₉ = 27 PF

C₁₁ = 47 KPF

C₁₂ = 220 µF/25V

VC₁ = 22 PF

VC₂ = 39 PF

Semiconductors

IC₁ = TEA5591

D₁ = 1N4007

Miscellaneous

L₁, L₃ = 3 turns of any pencil

L₂ = 5 turns of any pencil

L₄ = F.M. I.F.T.

XT₁, XT₂ = 10.7 MHz

Antenna

Walky-talky without using inductor or coil

PARTS LIST

Resistors (all ¼-watt, ± 5% Carbon)

R₁ = 47 KΩ

R₂ = 100 Ω

R₃, R₄, R₁₁, R₂₇ = 2.2 KΩ

R₅ = 330 KΩ

R₆, R₁₀ = 560 Ω

R₇ = 1 KΩ

R₈ = 220 KΩ

R₉ = 100 Ω

R₁₂, R₁₅, R₁₆ = 4.7 KΩ

R₁₃, R₃₁ = 10 KΩ

R₁₄ = 15 KΩ

R₁₇ = 1.8 KΩ

R₁₈ = 1.2 KΩ

R₁₉ = 1 KΩ

R₂₀ = 4.7 Ω

R₂₁, R₂₂ = 100 KΩ

R₂₃ = 120 KΩ

R₂₄ = 5.6 KΩ

R₂₅ = 22 KΩ

R₂₆ = 150 KΩ

R₂₈ = 330 Ω

R₂₉ = 220 KΩ

R₃₀ = 47 KΩ

VR₁ = 4.7 KΩ

VR₂ = 22 KΩ

Capacitors

C₁, C₆, C₁₀, C₂₄ = 1 KpF

C₂, C₄, C₅ = 47 KpF

C₃ = 20 KpF

C₇, C₉, C₂₃= 2.2 KpF

C₈ = 4.7 µF/16V

C₁₁ = 22 KpF

C₁₂, C₁₆ = 0.1 µF

C₁₃ = 2.2 µF/16 V

C₁₄, C₁₉, C₂₅, C₂₆ = 0.22 µF

C₁₅ = 10 µF/16V

C₁₇ = 220 µF/16V

C₁₈, C₂₀ = 10 KpF

C₂₁, C₂₂ = 68 pF

C₂₇ = 1000 µF/16V

C₂₈ = 10 µF/16V

Semiconductors

IC₁ = NE565 (Phase Lock IC)

IC₂ = LM386 (Amplifier IC)

IC₃ = CD4011 (Quad 2-input NAND Gate IC)

IC₄ = LM566 (Voltage Controlled Oscillator)

IC₅ = LM7812 (Voltage Regulator)

T₁ = BFW10

T₂, T₃ = BF194

T₄ = BC148

D₁ = 1N4148

Miscellaneous

XT₁ – XT₄ = 10.7 MHz crystal

SW₁ = Single pole double throw switch

LS₁ = 8Ω speaker

MIC₁ = Condenser microphone

Areal

 

Phone locker

PARTS LIST

Telephone                              -

Resistor	220 K
LED	GREEN
LED	RED
Capacitor	1 400V
Switch	SP

 

PC-BASED CANDLE IGNITOR

 

 Software:- The software written for this project is in “C” language in order to make the project PC based candle ignitor simple and easy. As shown in below code the address 378H of parallel port LPT₁ is used.

/* PROGRAMME TO LIGHT PC-BASED CANDLE */

#include<stdio.h>

#include<conio.h>

#include<stdlib.h>

void main()

 {

 int n;

 clrscr();

 outportb(0×0378,0);

 _setcursortype(_NOCURSOR);

 randomize();

 textcolor(2);

 gotoxy(40,25);

 cprintf(“By DREAMLOVER TECHNOLOGY, WWW.ELECTRONICSPROJECT.ORG”);

 while(!kbhit())

 {

 n=random(10);

 textcolor(n);

 gotoxy(23,13);

 cprintf(“Press enter to light up the “CANDLE” “);

 delay(100);

 }

 outportb(0×0378,1);

 getch();

 getch();

}

PARTS LIST

Resistors (all ¼-watt, ± 5% Carbon)

R₁, R₄ = 1 KΩ

R₂ = 2.7 KΩ

R₃ = 10 KΩ

VR₁ = 1 MΩ

Capacitors

C₁ = 47 µF/16V

C₂ = 0.01 µF

C₃ = 0.1 µF

Semiconductors

IC₁ = NE555 (Timer IC)

T₁, T₂ = BC548

D₁ = 1N4001

Miscellaneous

RL₁= 6V, 100W, 1C/O Relay

Heating Coil

25 pin “D” type parallel port

PC-Based Data Logger

 

The analogue input is given to pin 3 of op-amp IC, configured as differential amplifier through resistor R₄. Resistor R₃ and R₄ of same value for series input to op-amp IC is used here. The gain of amplifier is 0.5 set by feedback resistor, biasing resistor R₃ and R₅ with input resistor.

The swing of output from 0V to +5V is for swing in input -5 to +5V. The output is obtained from pin 6 given to the input pin 3 of IC₆. IC₆ is sample and hold amplifier which get control signal from computer through parallel port pin 14 to pin 8 for sample and hold mode. A poly propylene capacitor C₅ is used as hold capacitor connected to pin 6 of IC₆. The output from pin 5 is given to pin 6 of IC₇ according to control signal logic 1 puts in simple mode while logic 0 puts in hold mode.

The analogue output from sample and hold IC is fed to analogue to digital converter IC₇ for conversion into binary data. The IC₇ is controlled by three pin referred as chip-set (CS), read (RD) and write (WR) inputs. Logic 0 on CS and RD pin enable analogue to digital converter (ADC) and convert data to appear on output pin (11 to 18), where write WR pin occur low-to-high the conversation of analogue signal to binary signal is held. The end-of-conversion signal is done by INTR pin.

Here INTR pin indicate whether the conversion is start or over (i.e. low on INTR pin over the conversion where high starts the conversion and remain up to conversion). The signals from Analogue to Digital converter (ADC) through INTR go to inverter IC, inverted signal fed to pin 10 of parallel port. Digital output D₀ through D₇ of analogue to digital conversion is connected to pin 2 through 9 of parallel port, refer as data pins. Detail of register pin of parallel port is shown in table 1.

Register Pin Detail of the PC’s Parallel Port

Parallel Port pin NO.	Signal Name	Direction	Register bit	Inverted
1	nStrobe	Out	Control – 0	Yes
2	Data0	In/Out	Data – 0	No
3	Data1	In/Out	Data – 1	No
4	Data2	In/Out	Data – 2	No
5	Data3	In/Out	Data – 3	No
6	Data4	In/Out	Data – 4	No
7	Data5	In/Out	Data – 5	No
8	Data6	In/Out	Data – 6	No
9	Data7	In/Out	Data – 7	No
10	nAck	IN	Status – 6	No
11	Busy	IN	Status – 7	Yes
12	Paper-Out	IN	Status – 5	No
13	Select	IN	Status – 4	No
14	Linefeed	Out	Control – 1	Yes
15	nError	In	Status – 3	No
16	nInitialize	Out	Control – 2	No
17	nSelect-Printer	Out	Control – 3	Yes
18-25	Ground	-	-	-

PARTS LIST

Resistor (all ¼-watt, ± 5% Carbon, unless stated otherwise)

R₁ = 470 Ω

R₂, R₄ = 20 KΩ

R₃, R₅, R₈ = 10 KΩ

R₆, R₇ = 1 KΩ

Capacitors

C₁ – C₄ = 1000 µF, 25V (electrolytic capacitor)

C₅ = 0.01 µF (ceramic disc capacitor)

C₆ = 150 pF (ceramic disc capacitor)

Semiconductors

IC₁ = 7812 (+12V regulator)

IC₂ = 7805 (+5V regulator)

IC₃ = 7912 (-12V regulator)

IC₄ = 7905 (-5V regulator)

IC₅ = OP-07 (operational amplifier)

IC₆ = LF398 (sample and hold amplifier)

IC₇ = ADC0804analogue-to-digital converter

IC₈ = 74LS04 (hex inverter)

D₁ – D₅ = 1N4007 (rectifier diode)

LED₁ = LED (power-indicator)

Miscellaneous

X₁ = 230V/50Hz or 110/50Hz AC primary to 15V-0V-15V, 1A secondary step-down transfer

25-pin D type female connector

Two 25-pin D type male connector (for connecting two circuit to the female connector at the back of the PC and circuit)