Overview
An 820-piece metal-film resistor assortment that covers every common value from 10Ω up through 1MΩ — 41 values, 20 pieces each, organised in a labelled plastic storage case. The 1/4-watt size and tight 1% tolerance make these the right resistors for almost any breadboard project, signal-conditioning circuit, voltage divider, LED current limiter, pull-up / pull-down, or filter network. Metal-film construction also gives lower noise than carbon-film resistors at the same value, which matters for analog and audio work.
The included box has 41 individual compartments, each pre-filled with a strip of 20 axial-leaded resistors and labelled with its value. Open the lid, find the value you need, take what you need, snap the lid shut — the kit stays organised over years of use without resorting to baggies or a parts drawer with hundreds of loose components rolling around.
Use this assortment to seed a maker bench, classroom electronics lab, or repair toolkit. The resistor values cover the standard E12 / E24 series points needed for nearly every Arduino, ESP32, Raspberry Pi, or analog circuit you'll prototype.
At a Glance
Specifications
| Parameter | Value |
| Total Pieces | 820 resistors |
| Number of Values | 41 distinct values |
| Pieces per Value | 20 |
| Resistor Type | Metal film, axial-leaded (DIP / through-hole) |
| Power Rating | 1/4 watt (250 mW) |
| Tolerance | ±1% (precision) |
| Temperature Coefficient | ±100 ppm/°C typical |
| Operating Temperature | -55°C to +155°C |
| Body Length | ~6.3 mm |
| Lead Length | ~28 mm |
| Storage | Plastic case with 41 numbered, value-labelled compartments |
Included Values
The kit contains the standard E24 series spread across each decade of resistance:
| Decade | Values Included |
| 10s of ohms | 10, 22, 47, 100 Ω |
| 100s of ohms | 150, 200, 220, 270, 330, 470, 510, 680 Ω |
| Kilohms | 1k, 1.5k, 2k, 2.2k, 3.3k, 4.7k, 5.1k, 5.6k, 6.8k, 7.5k, 8.2k, 9.1k, 10k |
| 10s of kilohms | 15k, 20k, 22k, 33k, 47k, 51k, 68k, 75k, 82k, 100k |
| 100s of kilohms | 150k, 220k, 330k, 470k, 680k |
| Megohms | 1 MΩ |
Common Use Cases
| Application | Typical Value(s) |
|---|---|
| Arduino digital input pull-up / pull-down | 10 kΩ |
| I2C bus pull-ups (SDA, SCL) | 4.7 kΩ or 10 kΩ |
| LED current-limit (5V supply, 20 mA, red) | 220 Ω (drops ~3.3 V) |
| LED current-limit (3.3V supply, 20 mA) | 100 Ω (drops ~1.5 V) for blue/white |
| Voltage divider, 12V to 3.3V | 10 kΩ + 3.3 kΩ |
| Transistor base resistor (small-signal) | 1 kΩ – 10 kΩ |
| RC low-pass filter (1 kHz cutoff with 0.1 µF) | 1.5 kΩ |
| Op-amp gain stage (10x non-inverting) | 1 kΩ (ground) + 10 kΩ (feedback) |
| Reset pin pull-up | 10 kΩ |
Reading Resistor Values
Metal-film resistors with 1% tolerance use a 5-band colour code: 3 digits + multiplier + tolerance. Reading from the end with bands closest together:
| Band | Meaning |
| Band 1 | 1st digit |
| Band 2 | 2nd digit |
| Band 3 | 3rd digit |
| Band 4 | Multiplier (number of zeros) |
| Band 5 | Tolerance (brown = 1%) |
For example, brown-black-black-red-brown = 1, 0, 0, ×100, ±1% = 10 kΩ ±1%.