Resistors

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Categories of Resistors

Fixed Resistors : Standard resistors with a constant resistance value. Available in carbon film, metal film, and wire-wound types.

Variable Resistors (Potentiometers / Trimmers) : Adjustable resistance components used for tuning circuits, volume control, sensor calibration, and testing.

Precision Resistors : High-accuracy resistors with low tolerance values (e.g., 0.1%, 0.5%). Ideal for measurement circuits, instrumentation, and sensitive analog electronics.

Applications: Electronics, Robotics, IoT & DIY Circuits

Electronics Projects: Voltage dividers, LED current limiting, amplifier circuits.

Robotics: Sensor interfacing, motor driver pull-ups, encoder filtering.

IoT Devices: Low-power sensing, Wi-Fi/MCU biasing, signal conditioning.

DIY Maker Projects: Breadboard experiments, prototypes, hobby circuits, school electronics kits.

Resistor Color Code & Value Guide

Color Code Chart (4-band Resistors)

Color	Digit	Multiplier	Tolerance
Black	0	×1	—
Brown	1	×10	±1%
Red	2	×100	±2%
Orange	3	×1k	—
Yellow	4	×10k	—
Green	5	×100k	±0.5%
Blue	6	×1M	±0.25%
Violet	7	×10M	±0.1%
Grey	8	×100M	±0.05%
White	9	—	—
Gold	—	×0.1	±5%
Silver	—	×0.01	±10%

Example

Red (2) – Violet (7) – Brown (×10) – Gold (±5%)
→ 270 × 10 = 2700 Ω (2.7 kΩ), tolerance ±5%

Tolerance & Power Rating Comparison

Type	Typical Tolerance	Power Rating Options	Best Use
Carbon Film	±5%	1/8W, 1/4W, 1/2W	General electronics, prototypes
Metal Film	±1%–2%	1/4W, 1/2W	Precision circuits, analog designs
Wire-Wound	±1%–5%	1W–10W+	High-power resistive loads, motors

Key Notes

Higher wattage = can handle more heat.

Lower tolerance = higher accuracy.

Always use a resistor rated slightly above the calculated wattage for safety.

Soldering & Safe Use Tips

Use heat-resistant tweezers or pliers when soldering to avoid overheating the resistor body.

Do not exceed the resistor’s power rating to prevent burning or drifting in value.

Keep resistor leads short in high-frequency circuits to minimize noise.

For prototyping, start with metal film resistors for stable and consistent behavior.

Always double-check polarity for variable resistors (potentiometers have 3 pins; wiring direction matters).

Item Name	Price Inc GST (Approx)
1 Ohm Resistor - (Pack of 10)	10
100 Ohm Resistor - (Pack of 10)	10
100K Ohm Resistor (Pack of 10)	9
10M Ohm Resistor - (Pack of 10)	10
1M Ohm Resistor - (Pack of 10)	10
3.3k Ohm Resistor - (Pack of 10)	10
33k Ohm Resistor - (Pack of 10)	10
330 Ohm Resistor - (Pack of 10)	8
470 Ohm Resistor - (Pack of 10)	10
2.2k Ohm Resistor - (Pack of 10)	10
220 Ohm Resistor - (Pack of 10)	9
47k Resistor - (Pack of 10)	10
1k Ohm Resistor - (Pack of 10)	9
4.7k Ohm Resistor - (Pack of 10)	10
10k Ohm Resistor - Pack of 10	5
10K Sliding Potentiometer	149
Potentiometer Knobs - (Pack of 10)	135
22k Potentiometer (10 pcs)	95
Resistor Box (150 Resistors and 30 Values)	49

Item Name

Price Inc GST (Approx)

1 Ohm Resistor - (Pack of 10)

100 Ohm Resistor - (Pack of 10)

100K Ohm Resistor (Pack of 10)

10M Ohm Resistor - (Pack of 10)

1M Ohm Resistor - (Pack of 10)

3.3k Ohm Resistor - (Pack of 10)

33k Ohm Resistor - (Pack of 10)

330 Ohm Resistor - (Pack of 10)

470 Ohm Resistor - (Pack of 10)

2.2k Ohm Resistor - (Pack of 10)

220 Ohm Resistor - (Pack of 10)

47k Resistor - (Pack of 10)

1k Ohm Resistor - (Pack of 10)

4.7k Ohm Resistor - (Pack of 10)

10k Ohm Resistor - Pack of 10

10K Sliding Potentiometer

149

Potentiometer Knobs - (Pack of 10)

135

22k Potentiometer (10 pcs)

Resistor Box (150 Resistors and 30 Values)

Passive Buzzer Module 3.3V-5V DC

Filamet is really good

Really good filament with no moisture and printed perfectly

The module is working fine i wished you guys had a soldered one and i think you missed the anntena for this module so make sure to provide one with this module

Delivery and quality

Delivery in one day excellent
Product quality is good

Good Product

Good product and fast courier services. It was good experience ordering from Robocraze

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All About Resistors

Categories of Resistors

Applications: Electronics, Robotics, IoT & DIY Circuits

Resistor Color Code & Value Guide

Color Code Chart (4-band Resistors)

Example

Tolerance & Power Rating Comparison

Soldering & Safe Use Tips

Price List of Resistors in India

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Frequently Asked Questions

1.Where can I buy resistors online?

Resistor boxes and other combination sets of resistors can be bought online from online stores like Robocraze.

2. Where can I buy resistors near me (locally)?

Resistors are easily available in any electronic shops at your local city market.

3. Can I buy resistors in bulk?

Resistors are usually always sold as bulk as it isn't feasible to ship and sell individual resistors. So a bulk purchase of resistors is an economical option.

4. How to choose resistors online?

You can shoes the appropriate resistor by deciding on the value range, power rating, tolerance, etc. You can then cross check whether your requirements conform within the resistor specifications.

5. Define resistor specifications:

Resistance value: Resistance is the main measure of a resistor and it measure the opposition of electric flow, measured in ohms

Tolerance: Tolerance specifies the potential of deviation in error with respect to the resistance value

Power rating: Power rating specifies the power (voltage * current) the resistor can withstand

Stray inductance: Stray inductance is a measure of the amount of unwanted inductance the resistor induces into the circuit

Surge rating: Surge rating is a measure of potential pulse in power the resistor can withstand for a short amount of time

Maximum working voltage: Specifies the maximum voltage the resistor can handle without breaking down

6. What are the types of resistors?

Resistors come in a few types. The type you choose depends on your need and use case. Some of the types are

Carbon Composition Resistor: low cost, easy to construct resistors used for prototyping

Thermistor: Resistors who’s resistance value changes with temperature

Wire Wound Resistor: These resistors are used in high power applications

Variable Resistor: Resistors whose value can be varied by a knob

Varistor﻿: Non linear resistors that do not obey ohm’s law

Light Dependent Resistor: Resistors whose resistance changes depending on the light intensity falling onto the resistor

7. How to identify the value of a resistor?

Value of a resistor can be identified using two ways

Using a multimeter: Keep the multimeter in resistance mode and put the probes across the resistor. Your multimeter should indicate the approximate resistance of the resistor

By observing the colour bands: Resistor Values in resistors are indicated using coloured bands that specifies meaning. You can refer to the image below on what each colour band across a resistor depicts. Most resistors are four band resistors, so you can ignore the 5 and 6 band resistor for now

For example, 1. If the colour code of a 4 band resistor is yellow, violet, red and gold it means

1st digit (yellow) -> 4

2nd digit (violet) -> 7

3rd digit (red) -> 100

4th digit (gold) -> 5%

Inference: 47 x 100 with 5% tolerance = 4700 ohm = 4.7k Ohm resistor with 5% tolerance

2. If the colour code of a 4 band resistor is brown, black, brown and gold it means

1st digit (yellow) -> 1

2nd digit (violet) -> 0

3rd digit (red) -> 1

4th digit (gold) -> 5%

Inference: 10 x 10 with 5% tolerance = 100 ohm with 5% tolerance

8. What types of resistors are available?

9. Are these resistors suitable for Arduino and Raspberry Pi projects?

Yes, absolutely. These resistors are ideal for use with Arduino, Raspberry Pi and other microcontroller or SBC projects. Whether you are setting up pull-up or pull-down resistors, limiting LED current, building sensor circuits or doing prototyping, these resistors have you covered.

10. Do you provide 1% tolerance or precision resistors?

11. What power ratings are available for these resistors?

12. Can these resistors be used for prototyping & DIY electronics?

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Varistor: Non linear resistors that do not obey ohm’s law