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Details Circuit List 1998 - 2004

Circuit Diagram provided on Rahossho Patrika is for personal & Amateur purpose only, the writer is not responsible for any kind of Electronic component & Device damages that may occurred during making or Testing   period, great care must always be taken when assembling Electronic circuits that carry mains voltages. Mains wiring should be carried out by suitably qualified persons only.  Under no circumstances should any reader construct any mains operated equipment unless absolutely sure of his/her abilities in this area.  - Author
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Month

Year

Description

Page No.

Issue

November

1998

Electronic Mini Organ

29,30

01

December

1998

Electronic Multi Switch

35,36

02

January

1999

Memory Doorbell

38,39

03

February

1999

Power Amplifier

35,36

04

March

1999

Burglar Alarm

32,33

05

April

1999

Solar Battery Charger

24,25

06

May

1999

MW Transmitter

44,45

07

June

1999

Automatic Light

138,139

08

July

1999

Telephone Amplifier

21,22

09

August

1999

Digital Clock

 -

10

September

1999

CD–ROM to CD Player

24,25

11

October

1999

Wiring Fault Detector

44,45,46

12

November

1999

Battery Charger

33,34

13

December

1999

AC Main Voltage Detector, Telephone Ringer

48,49,50

14

January

2000

Record Play Indicator, Two way Switching

48,49,50

15

February

2000

Power Supply

80,81,82

16

March

2000

Stereo pre amp & tone Control

24,25

17

April

2000

Timer

33,34,35

18

May

2000

Transformers less  Power Supply

89,90

19

June

2000

Audio CD to Video CD

127,128,129,130

20

July

2000

Audio Recording Monitor

12,13,14,15

21

August

2000

Wireless Recording, Equalizer, Intercom

92,93,94

22

September

2000

Electronic Door Lock

92,93,94,95

23

October

2000

Melody tune, NI-cad charger, Phone Ringer

35,36,37

24

November

2000

Clap Switch, Auto-off Battery Charger

16,17,18

25

December

2000

Manual Surge Protector, Automatic Surge Pro, Light Switch

118,119,120,121

26

January

2001

Mini FM Transmetre,10 W Mini Amplifier

126,127,128,129

27

February

2001

Voltage Probe, Simple Polarity Tester, Timer Tester

39,40,41,42

28

March & April

2001

Line Mixer

29

May

2001

Digital Switch, Audio disconector ,Voice/Record circuit

83,84,85,86,87

30

June

2001

Converter, Multi Power Source

111,112,113

31

July

2001

Speaker Mic,By-cycle Safety light

78,79,80,81

32

August

2001

Electronic Hand Dryer

128,129,130,131

33

September

2001

Siren Circuit

122,123,124

34

October

2001

Telephone Recorder

115,116,117118

35

November

2001

Light/Dark control relay

86,87,88

36

December

2001

Battery Charge Monitor

48,49,50

37

January

2002

Auto cut Manual Stabilizer

141,142,143

38

February

2002

Electronic Lock

48,49,50

39

March

2002

Adjustable Timer

22,23,24

40

April

2002

Power Alarm (With PCB)

140,141,142,143

41

May

2002

LDR Operated Switch (With PCB)

139,140,141

42

June

2002

Timer Touch Switch (With PCB)

126,127,128

43

July

2002

Infra-Red Remote Control (With PCB)

137,138,139,140

44

Aug

2002

Battery Charge Monitor (With PCB)

84,85,86,87

45

Sep

2002

Water Level Sensor (With PCB)

132,133,134

46

Oct

2002

Intercom

21,22

47

Nov

2002

TDA-2003 Bridge Amp (With PCB)

133,134,135

48

Dec

2002

Temperature Alarm (With PCB)

115,116,117

49

Jan

2003

Phone Privacy circuit (With PCB)

33,34,35,36,37

50

Feb

2003

Burglar Alarm (With PCB)

123,123,125

51

March

2003

Tone Control (With PCB)

132,133,134,135

52

April

2003

Emergency Door-Light

24,25,26,27

53

May

2003

Pre-Amp Circuit (With PCB)

95,96,97

54

June

2003

Continuity Tester (With PCB)

34,35,36,37,38

55

July

2003

Mini FM Transmitter-2 (With PCB)

47,48,49,50

56

August

2003

Stereo Tone Control

147,148,149

57

September

2003

Medium Wave Radio (With PCB)

132,133,134,135

58

October

2003

50 (RMS) Watt Power Amp

126,127,128

59

November

2003

Solar Charger-2

37,38,39

60

December

2003

Desktop Power Supply

75,76,77,78

61

January

2004

IC Water Alarm Circuit (With PCB)

131,132,133

62

February

2004

SMD Phone Ringer (With PCB)

 

63

March

2004

8 Tone Sound Generator (HT-88)

38,39,40

64

April

2004

Sound Level Indicator (With PCB)

 

65

May

2004

Decoration Light (With PCB)

48,49,50

66

June

2004

2 Amp Power Supply (With PCB)

76,77,78,79

67

July

2004

Home Phone

 

68

August

2004

Long Range Timer

93,94,95,96

69

September

2004

Guitar Transmitter (With PCB)

91,92,93,94

70

October

2004

Mini FM Radio (With PCB)- Part-1

136,137,139

71

November

2004

Mini FM Radio - Part-2

133,134,135,136

72

December

2004

Bed Side Night Light (With PCB)

 

73

January

2005

LED Necklace  (With PCB)

37,38,39,40

74

February

2005

Bat Band Converter (With PCB)

45,46,47,48,49 75

March

2005

Quiz Monitor