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Hobby Electronics in |
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Details Circuit List 1998 - 2004 |
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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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All Circuit Diagram of the Magazine are available in Our Hobby Forum, (Download Members are able to access the download area) |
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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 |
|
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 |
|
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 |
|
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 |
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