MR Elec

MR Elec Welcome MR Elec. ( Contact us for Third party Authorized Service ).

🌍 Contact us:
Owner : Md.

Any Brand of LCD LED, OLED, QLED, Smart, Android, 4K / 8K UHD TV, Parts Sales & Electronics Equipment Repair Service center & Home Service Technician Available Dinajpur. Sales & Service Center.

đŸ”Ĩ Any Brand of Home Appliances LCD LED TV & Microwave Oven and Electric and Electrical and Electronics equipment Repair Service Technician.

🏠 Provides expert Home appliance & Television repair services a

cross Dinajpur.

🏠 All bands of TV / Microwave Oven are repaired at home or office.

âš™ī¸ We work with great care and provide service throughout Dinajpur.

đŸ“ŗđŸ“´ If our number is busy or it is late at night-
Message us and we will contact you.

â¤ī¸ Your service is our loyalty.

🔌 Whole Dinajpur Sadar :
( If you want, you can also bring your TV to our service center. )

🤝 Third party Authorized Service of all brands of Home Appliances LCD LED TV & Microwave Oven. Mamunur Rashid
📲 +88 01788188133

Address: Buti Babur Mor - Lily mor road, Bank Asia - Opposite Second Floor, Dinajpur Sadar Upazila 5200, Bangladesh. Your Queries :
Electric and Electrical and Electronics equipment Repair Service Technician
TV Repair Dinajpur
Microwave Repair Dinajpur
Home Service Dinajpur
Appliance Repair
Microwave Repair
Home Appliance Service
TV Service Technician
Smart TV Service
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SMD Resistor Code Chart Explained – Decode 3-Digit Markings into Ohms, kΩ, and MΩ Values Easily---📝 Detailed Information...
16/04/2026

SMD Resistor Code Chart Explained – Decode 3-Digit Markings into Ohms, kΩ, and MΩ Values Easily

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📝 Detailed Information:
This image presents a clear and practical SMD (Surface-Mount Device) resistor code chart, commonly used in modern electronics. These tiny resistors don’t display full resistance values—instead, they use a 3-digit numerical code to represent resistance.

🔍 How the Code Works:

The first two digits represent the significant numbers.

The third digit indicates the number of zeros (multiplier).

📊 Examples from the Chart:

101 → 10 × 10š = 100 Ί

102 → 10 × 10² = 1.0 kΊ

152 → 15 × 10² = 1.5 kΊ

222 → 22 × 10² = 2.2 kΊ

332 → 33 × 10² = 3.3 kΊ

472 → 47 × 10² = 4.7 kΊ

103 → 10 × 10Âŗ = 10 kΊ

223 → 22 × 10Âŗ = 22 kΊ

104 → 10 × 10⁴ = 100 kΊ

105 → 10 × 10âĩ = 1.0 MΊ

âš™ī¸ Why This Chart is Useful:

Helps technicians quickly identify resistor values

Essential for PCB repair, DIY electronics, and circuit design

Saves time when working with unlabeled or tiny components

Widely used in mobile repair, TV repair, and embedded systems

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🚨 Simple Siren Sound Generator Circuit – Make Your Own Alarm Sound!āĻŽāĻžāĻ¤ā§āϰ 3.7V āĻŦā§āϝāĻžāϟāĻžāϰāĻŋāϤ⧇ āĻŦāĻžāύāĻžāύ āĻĒ⧁āϞāĻŋāĻļ/āĻ…ā§āϝāĻžāĻŽā§āĻŦ⧁āϞ⧇āĻ¨ā§āϏ āϏāĻžāχāϰ⧇...
08/04/2026

🚨 Simple Siren Sound Generator Circuit – Make Your Own Alarm Sound!
āĻŽāĻžāĻ¤ā§āϰ 3.7V āĻŦā§āϝāĻžāϟāĻžāϰāĻŋāϤ⧇ āĻŦāĻžāύāĻžāύ āĻĒ⧁āϞāĻŋāĻļ/āĻ…ā§āϝāĻžāĻŽā§āĻŦ⧁āϞ⧇āĻ¨ā§āϏ āϏāĻžāχāϰ⧇āύ 🔊
DIY electronics lovers āĻāϰ āϜāĻ¨ā§āϝ āĻĻāĻžāϰ⧁āĻŖ āĻāĻ•āϟāĻŋ āĻĒā§āϰāĻœā§‡āĻ•ā§āϟ!

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📖 Detailed Description (SEO Friendly)

āĻāχ Siren Sound Generator Circuit āĻāĻ•āϟāĻŋ āϏāĻšāϜ āĻ•āĻŋāĻ¨ā§āϤ⧁ āĻ•āĻžāĻ°ā§āϝāĻ•āϰ DIY āχāϞ⧇āĻ•āĻŸā§āϰāύāĻŋāĻ•ā§āϏ āĻĒā§āϰāĻœā§‡āĻ•ā§āϟ, āϝāĻž āĻĻāĻŋā§Ÿā§‡ āφāĻĒāύāĻŋ āĻŦāĻŋāĻ­āĻŋāĻ¨ā§āύ āϧāϰāύ⧇āϰ āϏāĻžāχāϰ⧇āύ āϏāĻžāωāĻ¨ā§āĻĄ (Police / Ambulance style) āϤ⧈āϰāĻŋ āĻ•āϰāϤ⧇ āĻĒāĻžāϰāĻŦ⧇āύāĨ¤

🧩 āĻĒā§āϰāϧāĻžāύ āĻ•āĻŽā§āĻĒā§‹āύ⧇āĻ¨ā§āϟāϏāĻŽā§‚āĻš:

A940 Transistor (Output amplification)

BC547 Transistor (Oscillation āϤ⧈āϰāĻŋ āĻ•āϰ⧇)

Capacitors (220ÂĩF, 223J – frequency control)

Resistors (10k, 47k, 1k – timing āĻ“ biasing)

Speaker (Sound output)

Push Button (ON/OFF control)

3.7V Battery (Power supply)

âš™ī¸ āĻ•āĻŋāĻ­āĻžāĻŦ⧇ āĻ•āĻžāϜ āĻ•āϰ⧇:
āĻāχ āϏāĻžāĻ°ā§āĻ•āĻŋāĻŸā§‡ BC547 transistor āĻĻāĻŋā§Ÿā§‡ oscillation āϤ⧈āϰāĻŋ āĻšā§Ÿ (frequency up-down āĻšā§Ÿ), āϝāĻžāϰ āĻĢāϞ⧇ āϏāĻžāχāϰ⧇āύ⧇āϰ āĻŽāϤ⧋ “wee-woo” āϏāĻžāωāĻ¨ā§āĻĄ āϤ⧈āϰāĻŋ āĻšā§ŸāĨ¤
āĻāϰāĻĒāϰ A940 transistor āϏ⧇āχ āϏāĻŋāĻ—āĻ¨ā§āϝāĻžāϞ amplify āĻ•āϰ⧇ āĻ¸ā§āĻĒāĻŋāĻ•āĻžāϰ⧇ āĻĒāĻžāĻ āĻžā§Ÿ, āĻĢāϞ⧇ āĻļāĻŦā§āĻĻāϟāĻŋ āĻœā§‹āϰ⧇ āĻļā§‹āύāĻž āϝāĻžā§ŸāĨ¤

💡 āĻŦā§āϝāĻŦāĻšāĻžāϰ:

DIY Alarm System

Toy Siren Project

School / College Electronics Project

Security Alert System

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07/04/2026

No Display Sound ok

Any Brand of LCD LED, OLED, QLED, Smart, Android, 4K / 8K UHD TV, Parts Sales & Electronics Equipment Repair Service center & Home Service Technician Available.

Service Technician:
MD. Mamunur Rashid.
01788188133.
Address: Buti Babur Mor - Lily mor road, Bank Asia - Opposite Second Floor, Dinajpur Sadar.

TOSHIBA 32V35KP.Any Brand of LCD LED, OLED,  QLED, Smart, Android, 4K / 8K UHD TV, Parts Sales & Electronics Equipment R...
06/04/2026

TOSHIBA 32V35KP.

Any Brand of LCD LED, OLED, QLED, Smart, Android, 4K / 8K UHD TV, Parts Sales & Electronics Equipment Repair Service center & Home Service Technician Available.

Service Technician:
MD. Mamunur Rashid.
01788188133.
Address: Buti Babur Mor - Lily mor road, Bank Asia - Opposite Second Floor, Dinajpur Sadar.

LG 43" CKV MARKING.
05/04/2026

LG 43" CKV MARKING.

HV320WHB-F56 Mapping.👉 Any Brand of LCD LED, OLED,  QLED, Smart, Android, 4K / 8K UHD TV, Parts Sales & Repair Service c...
05/04/2026

HV320WHB-F56 Mapping.

👉 Any Brand of LCD LED, OLED, QLED, Smart, Android, 4K / 8K UHD TV, Parts Sales & Repair Service center.

320XVN02.C   .C
05/04/2026

320XVN02.C

.C

HISENSE 43A4200G👉 Any Brand of LCD LED, OLED,  QLED, Smart, Android, 4K / 8K UHD TV, Parts Sales & Repair Service center...
05/04/2026

HISENSE 43A4200G

👉 Any Brand of LCD LED, OLED, QLED, Smart, Android, 4K / 8K UHD TV, Parts Sales & Repair Service center.

đŸ”Ĩ Simple 12V LED Driver Circuit – Easy DIY Electronics Project!āĻŽāĻžāĻ¤ā§āϰ āĻ•āϝāĻŧ⧇āĻ•āϟāĻŋ āĻ•āĻŽā§āĻĒā§‹āύ⧇āĻ¨ā§āϟ āĻĻāĻŋāϝāĻŧ⧇ āϤ⧈āϰāĻŋ āĻ•āϰ⧁āύ āĻļāĻ•ā§āϤāĻŋāĻļāĻžāϞ⧀ 12V LE...
05/04/2026

đŸ”Ĩ Simple 12V LED Driver Circuit – Easy DIY Electronics Project!
āĻŽāĻžāĻ¤ā§āϰ āĻ•āϝāĻŧ⧇āĻ•āϟāĻŋ āĻ•āĻŽā§āĻĒā§‹āύ⧇āĻ¨ā§āϟ āĻĻāĻŋāϝāĻŧ⧇ āϤ⧈āϰāĻŋ āĻ•āϰ⧁āύ āĻļāĻ•ā§āϤāĻŋāĻļāĻžāϞ⧀ 12V LED āĻĄā§āϰāĻžāχāĻ­āĻžāϰ 💡
āύāĻŋāĻœā§‡āχ āĻŦāĻžāύāĻžāύ, āύāĻŋāĻœā§‡āχ āĻļāĻŋāϖ⧁āύ — Electronics āĻāĻ–āύ āφāϰāĻ“ āϏāĻšāϜ! ⚡

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🧾 āĻŦāĻŋāĻ¸ā§āϤāĻžāϰāĻŋāϤ āϤāĻĨā§āϝ (Description)

āĻāχ āϏāĻžāĻ°ā§āĻ•āĻŋāϟāϟāĻŋ āĻāĻ•āϟāĻŋ āϏāĻšāϜ 12V LED Driver Circuit, āϝāĻž DIY āχāϞ⧇āĻ•āĻŸā§āϰāύāĻŋāĻ•ā§āϏ āĻĒā§āϰāĻœā§‡āĻ•ā§āĻŸā§‡āϰ āϜāĻ¨ā§āϝ āϖ⧁āĻŦāχ āωāĻĒāϝ⧋āĻ—ā§€āĨ¤ āĻāĻ–āĻžāύ⧇ āĻāĻ•āϟāĻŋ āĻ…āĻĒā§āĻŸā§‹-āĻ•āĻžāĻĒāϞāĻžāϰ (817), āϰ⧇āϜāĻŋāĻ¸ā§āϟāϰ, āĻĄāĻžā§Ÿā§‹āĻĄ (1N4007) āĻāĻŦāĻ‚ āĻāĻ•āϟāĻŋ 470ÂĩF āĻ•ā§āϝāĻžāĻĒāĻžāϏāĻŋāϟāĻžāϰ āĻŦā§āϝāĻŦāĻšāĻžāϰ āĻ•āϰāĻž āĻšā§Ÿā§‡āϛ⧇āĨ¤

🔧 āĻĒā§āϰāϧāĻžāύ āĻ•āĻŽā§āĻĒā§‹āύ⧇āĻ¨ā§āϟāϏāĻŽā§‚āĻš:

470ÂĩF 25V Capacitor

100Ί Resistor

4.7kΊ Resistor

1N4007 Diode

PC817 Optocoupler

12V LED Module

âš™ī¸ āĻ•āĻžāĻœā§‡āϰ āĻĒā§āϰāĻ•ā§āϰāĻŋ⧟āĻž (Working Principle):
āĻāχ āϏāĻžāĻ°ā§āĻ•āĻŋāĻŸā§‡ āĻ…āĻĒā§āĻŸā§‹-āĻ•āĻžāĻĒāϞāĻžāϰ āĻŦā§āϝāĻŦāĻšāĻžāϰ āĻ•āϰ⧇ āχāύāĻĒ⧁āϟ āĻ“ āφāωāϟāĻĒ⧁āϟāϕ⧇ āφāϞāĻžāĻĻāĻž āϰāĻžāĻ–āĻž āĻšā§Ÿ, āϝāĻž āύāĻŋāϰāĻžāĻĒāĻ¤ā§āϤāĻž āĻŦāĻžā§œāĻžā§ŸāĨ¤ āĻ•ā§āϝāĻžāĻĒāĻžāϏāĻŋāϟāĻžāϰ āĻ­ā§‹āĻ˛ā§āĻŸā§‡āϜ āĻ¸ā§āĻŽā§āĻĨ āĻ•āϰ⧇ āĻāĻŦāĻ‚ āĻĄāĻžā§Ÿā§‹āĻĄ āϰāĻŋāĻ­āĻžāĻ°ā§āϏ āĻ•āĻžāϰ⧇āĻ¨ā§āϟ āĻĨ⧇āϕ⧇ āϏāĻžāĻ°ā§āĻ•āĻŋāϟāϕ⧇ āϰāĻ•ā§āώāĻž āĻ•āϰ⧇āĨ¤ āϰ⧇āϜāĻŋāĻ¸ā§āϟāϰāϗ⧁āϞ⧋ āĻ•āĻžāϰ⧇āĻ¨ā§āϟ āύāĻŋ⧟āĻ¨ā§āĻ¤ā§āϰāĻŖ āĻ•āϰ⧇ LED āϕ⧇ āύāĻŋāϰāĻžāĻĒāĻĻ āϰāĻžāϖ⧇āĨ¤

💡 āĻŦā§āϝāĻŦāĻšāĻžāϰ:

LED āϞāĻžāχāϟ āĻĒā§āϰāĻœā§‡āĻ•ā§āϟ

DIY āχāϞ⧇āĻ•āĻŸā§āϰāύāĻŋāĻ•ā§āϏ āĻļ⧇āĻ–āĻžāϰ āϜāĻ¨ā§āϝ

āϛ⧋āϟ āĻĒāĻžāĻ“ā§ŸāĻžāϰ āϏāĻžāĻ°ā§āĻ•āĻŋāϟ āĻĄā§āϰāĻžāχāĻ­āĻžāϰ

âš ī¸ āϏāϤāĻ°ā§āĻ•āϤāĻž:
āφāĻŽāĻŋ 100% āύāĻŋāĻļā§āϚāĻŋāϤ āύāχ āĻāχ āϏāĻžāĻ°ā§āĻ•āĻŋāϟāϟāĻŋ āϏāĻŦ āϧāϰāύ⧇āϰ 12V LED-āĻāϰ āϜāĻ¨ā§āϝ āωāĻĒāϝ⧁āĻ•ā§āϤ āĻ•āĻŋāύāĻžâ€”āĻŦā§āϝāĻŦāĻšāĻžāϰ⧇āϰ āφāϗ⧇ āĻ…āĻŦāĻļā§āϝāχ āĻŸā§‡āĻ¸ā§āϟ āĻ•āϰ⧇ āύāĻŋāύāĨ¤

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AMS1117 Voltage Regulator Guide – 5V, 3.3V, 1.8V, 1.5V & 1.2V Explained!āφāĻĒāύāĻžāϰ āϏāĻžāĻ°ā§āĻ•āĻŋāĻŸā§‡ āϏāĻ āĻŋāĻ• āĻ­ā§‹āĻ˛ā§āĻŸā§‡āϜ āύāĻž āĻĨāĻžāĻ•āϞ⧇ āĻĄāĻŋāĻ­āĻžāχāϏ āĻ•āĻžāϜ ...
04/04/2026

AMS1117 Voltage Regulator Guide – 5V, 3.3V, 1.8V, 1.5V & 1.2V Explained!
āφāĻĒāύāĻžāϰ āϏāĻžāĻ°ā§āĻ•āĻŋāĻŸā§‡ āϏāĻ āĻŋāĻ• āĻ­ā§‹āĻ˛ā§āĻŸā§‡āϜ āύāĻž āĻĨāĻžāĻ•āϞ⧇ āĻĄāĻŋāĻ­āĻžāχāϏ āĻ•āĻžāϜ āĻ•āϰāĻŦ⧇ āύāĻž! āĻāχ AMS1117 āϏāĻŋāϰāĻŋāĻœā§‡āϰ āĻ­ā§‹āĻ˛ā§āĻŸā§‡āϜ āϰ⧇āϗ⧁āϞ⧇āϟāϰ āĻĻāĻŋā§Ÿā§‡ āϏāĻšāĻœā§‡āχ āĻ¸ā§āĻĨāĻŋāϰ āφāωāϟāĻĒ⧁āϟ āĻ­ā§‹āĻ˛ā§āĻŸā§‡āϜ āĻĒ⧇āϤ⧇ āĻĒāĻžāϰ⧇āύāĨ¤ TV, Router, Set-top box āĻŦāĻž DIY Electronics āĻĒā§āϰāĻœā§‡āĻ•ā§āĻŸā§‡ āĻāϟāĻŋ āϖ⧁āĻŦāχ āϗ⧁āϰ⧁āĻ¤ā§āĻŦāĻĒā§‚āĻ°ā§āĻŖ āĻāĻ•āϟāĻŋ āĻ•āĻŽā§āĻĒā§‹āύ⧇āĻ¨ā§āϟāĨ¤ ⚡

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📘 āĻŦāĻŋāĻ¸ā§āϤāĻžāϰāĻŋāϤ āϤāĻĨā§āϝ

AMS1117 voltage regulator āĻāĻ•āϟāĻŋ āϜāύāĻĒā§āϰāĻŋ⧟ Low Dropout (LDO) Linear Voltage Regulator IC, āϝāĻž āĻŦāĻŋāĻ­āĻŋāĻ¨ā§āύ āύāĻŋāĻ°ā§āĻĻāĻŋāĻˇā§āϟ āφāωāϟāĻĒ⧁āϟ āĻ­ā§‹āĻ˛ā§āĻŸā§‡āĻœā§‡ āĻĒāĻžāĻ“ā§ŸāĻž āϝāĻžā§ŸāĨ¤

âš™ī¸ āϏāĻžāϧāĻžāϰāĻŖ āĻ­ā§‹āĻ˛ā§āĻŸā§‡āϜ āĻ­ā§āϝāĻžāϰāĻŋā§Ÿā§‡āĻ¨ā§āϟ:

5.0V

3.3V

1.8V

1.5V

1.2V

🔌 Pin Configuration (SOT-223 Package):

1. GND – āĻ—ā§āϰāĻžāωāĻ¨ā§āĻĄ

2. OUT – āφāωāϟāĻĒ⧁āϟ āĻ­ā§‹āĻ˛ā§āĻŸā§‡āϜ

3. IN – āχāύāĻĒ⧁āϟ āĻ­ā§‹āĻ˛ā§āĻŸā§‡āϜ

⚡ āĻŦā§āϝāĻŦāĻšāĻžāϰ:

TV Mainboard Repair

Android Box / Router Power Section

Arduino / Microcontroller Projects

Power Supply Regulation

🔍 āϗ⧁āϰ⧁āĻ¤ā§āĻŦāĻĒā§‚āĻ°ā§āĻŖ āĻŦ⧈āĻļāĻŋāĻˇā§āĻŸā§āϝ:

Low Dropout Voltage (~1.1V approx, datasheet āĻ…āύ⧁āϝāĻžā§Ÿā§€ āĻ­ā§āϝāĻžāϰāĻžāχ āĻ•āϰāϤ⧇ āĻĒāĻžāϰ⧇)

Maximum Output Current ≈ 800mA (cooling-āĻāϰ āωāĻĒāϰ āύāĻŋāĻ°ā§āĻ­āϰ āĻ•āϰ⧇)

Stable Output Voltage

👉 Note: āχāύāĻĒ⧁āϟ āĻ­ā§‹āĻ˛ā§āĻŸā§‡āϜ āϏāĻŦāϏāĻŽā§Ÿ āφāωāϟāĻĒ⧁āĻŸā§‡āϰ āĻĨ⧇āϕ⧇ āĻŦ⧇āĻļāĻŋ āĻšāϤ⧇ āĻšāĻŦ⧇ (Dropout Voltage maintain āĻ•āϰāϤ⧇)

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Address

Buti Babur Mor/Lily Mor Road, Bank Asia/Opposite Second Floor, Dinajpur Sadar.
Dinajpur
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