Universal Electronic Component Starter Kit (Resistors, Capacitors, LEDs)

Assorted resistors, capacitors, LEDs, transistors, diodes, potentiometers and switches for prototyping.

₹200 + 18% GST

SKU: BOTBIT-PWR-16 · Best for: Building status and indicator circuits with LEDs and current-limiting resistors on Arduino, ESP32 or Raspberry Pi projects

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Overview

About Universal Electronic Component Starter Kit (Resistors, Capacitors, LEDs).

The Universal Electronic Component Starter Kit is an assorted collection of the most commonly used through-hole passive and active components, packed into one box so you never have to stop a project to hunt for a single 10k resistor or a 100nF capacitor. It bundles a range of resistor values, ceramic and electrolytic capacitors, standard 5mm LEDs, general-purpose transistors, signal diodes, trimmer/rotary potentiometers and tactile push switches into labelled compartments or taped strips. Because every part uses standard 0.1-inch (2.54mm) lead spacing, everything drops straight into a solderless breadboard or perfboard.

It is popular in India because it is the cheapest way for a beginner, hobbyist or student to get a working parts inventory without buying each value individually. Buying resistors, capacitors and semiconductors one-by-one from a local shop costs more in travel and minimum-order fees than a single kit, and the kit removes the guesswork of which values to keep on hand. For Arduino, ESP32, Raspberry Pi and general electronics learning, this is the standard companion buy.

What makes a good kit is breadth of coverage and clear labelling. A well-assembled kit covers the E12 resistor decade from 10 ohm up to 1M ohm, the everyday capacitor values (10pF to 470uF), the workhorse semiconductors (2N2222/BC547 NPN, 1N4148 signal and 1N4007 rectifier diodes) and the parts you reach for constantly when prototyping (LEDs for status, pots for tuning, tact switches for input).

Key features

Why it stands out.

All-in-one assortment: resistors, ceramic and electrolytic capacitors, 5mm LEDs, transistors, diodes, potentiometers and tactile switches in a single box

Standard through-hole (DIP) parts with 2.54mm / 0.1-inch lead pitch that plug directly into any solderless breadboard or perfboard

Wide resistor coverage across the E12 series, typically 1/4W 5% carbon-film from 10 ohm to 1M ohm

Mixed capacitor set: multilayer ceramic (pF to nF range) plus radial aluminium electrolytics (uF range, typically up to 470uF/50V)

Common semiconductors included: general-purpose NPN transistors, 1N4148 signal diodes and 1N4007 rectifier diodes

Labelled compartments / taped-and-reeled strips so values are easy to identify and restock

Specifications

Selection facts.

Kit type	Assorted through-hole electronic components starter kit
Resistors	1/4W (0.25W) 5% carbon film, E12 values 10 ohm to 1M ohm
Ceramic capacitors	Multilayer / disc, ~10pF to 100nF (0.1uF), 50V rated
Electrolytic capacitors	Radial aluminium, ~1uF to 470uF, 16V/25V/50V
LEDs	5mm through-hole, assorted colours (red, green, yellow, blue, white), ~1.8-3.2V forward
Transistors	General-purpose NPN (e.g. 2N2222 / BC547), TO-92 package
Diodes	1N4148 signal diodes and 1N4007 (1A/1000V) rectifier diodes
Potentiometers	Rotary and/or trimmer (e.g. 10k), single-turn
Switches	Tactile momentary push buttons (typically 6x6mm)
Lead pitch / mounting	2.54mm (0.1 inch), breadboard and perfboard compatible

Applications

Where it is used.

Building status and indicator circuits with LEDs and current-limiting resistors on Arduino, ESP32 or Raspberry Pi projects
Prototyping RC filters, timing networks and decoupling using the mixed resistor and capacitor values
Learning transistor fundamentals: switching a load, building a simple NPN switch or amplifier stage
Adding user input to projects with tactile push buttons (with pull-up/pull-down resistors) and tuning with potentiometers
Power-supply and rectifier experiments using 1N4007 diodes and electrolytic smoothing capacitors
School, college and lab electronics coursework and breadboard exercises

Buying guide

How to choose.

This kit is ideal for absolute beginners, students starting electronics or robotics, and anyone building an Arduino/ESP32 project who needs a baseline stock of common parts. If you already have a stocked bench, buy it only if you are running low on the everyday values; otherwise a targeted resistor/capacitor book may suit you better.

When choosing between kits, check that the resistor range spans the full E12 decade (10 ohm to 1M ohm) rather than only a handful of values, and confirm the capacitor set includes both small ceramics (for decoupling and timing) and larger electrolytics (for smoothing). More expensive kits add a component storage box, a resistor colour-code card and higher piece counts. Because exact contents vary by supplier at this price point, treat the listed values as representative.

Pair this kit with a solderless breadboard, a set of male-to-male jumper wires, a multimeter and an Arduino Uno or ESP32 board to have everything you need to start prototyping. A basic soldering iron and some perfboard let you move finished circuits off the breadboard for permanent builds.

FAQ

Common questions.

Will these components work with Arduino, ESP32 and Raspberry Pi?

Yes. These are standard 5V/3.3V-friendly through-hole parts. LEDs (with a series resistor, typically 220-330 ohm), push buttons, resistors, capacitors and transistors are exactly the components used in most beginner Arduino and ESP32 tutorials. Remember Raspberry Pi GPIO is 3.3V, so size LED resistors and never feed 5V into its pins.

What resistor value do I use to light an LED safely?

For a standard LED on a 5V supply, a 220 ohm or 330 ohm 1/4W resistor in series is the safe, common choice and both are included in the kit. On 3.3V (ESP32 / Raspberry Pi), 220 ohm works well. Always put the resistor in series with the LED, and connect the LED with the correct polarity (longer leg is the anode/positive).

How do I read the resistor values?

The resistors use the standard 4-band colour code (three bands for value plus a gold 5% tolerance band). If the kit does not include a colour-code card, any online resistor colour calculator or a multimeter set to ohms will confirm the value quickly.

Are these parts solderable, or only for breadboards?

Both. They are through-hole components with tinned leads, so they push into a breadboard for testing and can also be soldered onto perfboard or a PCB for a permanent build. No surface-mount soldering skills are required.

Do the transistors need any driver library or code?

No. Resistors, capacitors, diodes, LEDs and transistors are passive/discrete analog parts with no firmware. You only write code for the microcontroller controlling them (for example toggling an Arduino pin), not for the components themselves.

Is this available in India and what exactly is in the box?

Yes, BotBit ships within India. The box contains an assortment of resistors, ceramic and electrolytic capacitors, 5mm LEDs, NPN transistors, signal and rectifier diodes, at least one potentiometer and tactile push switches. Exact per-value quantities vary by batch at this price, so use the listing specs as a representative guide.