Head office, Rana Pratap Bagh, Delhi011 2721 1512+91 97116 99511

Spare parts

Components and Spares

Electronic components, spares and science project material kits for school and engineering projects: DC motors, propeller fans, 9V batteries, LEDs, buzzers, sensors, switches, wires, breadboards and circuit boards. Build a new working model or repair an old one.

  • 22 products
  • ₹149 to ₹849
  • Buy on Amazon
See the 22 productsBuyer's guide
A student wiring a breadboard circuit with jumper wires beside a box of electronic components
ComponentSubmersible Pump DC Toy Motor Solar Panel with 9V Battery & Fan Blades DIY Kit₹389View22 productsSearch, filter and sort below

The catalogue

All Components and Spares

Every product has its own page with the details. The Buy button opens the listing on Amazon, where you pay and see the delivery date for your PIN code.

22 products

Filter and sort

Price

About Components and Spares

Parts to build or repair a science working model at home or in the school lab: DC toy motors, BO gear motors with wheels, propeller fan blades, 9V batteries with connectors, mini solar panels, LEDs, bulb holders, switches, buzzers, jumper wires, berg strips, solderless breadboards and zero PCBs. Several listings are mixed packs with the common parts for a school project, so one order can cover a whole model.

Read the full overview

What the packs contain

  • Motor packs: DC toy motors or BO gear motors, with wheels or fan blades and a 9V battery with a snap connector
  • Solar packs: a mini solar panel with a small fan or LEDs and wires, for a solar street light or solar house model
  • Circuit basics: bulb holders, switches, LEDs, a buzzer and connecting wires
  • Prototyping: MB-102 830-point and similar solderless breadboards, berg strips, jumper wires and zero PCBs
  • Logic gates: a pack of 110-plus parts with NAND and other logic gate ICs for electronics projects
  • Tools: a soldering iron kit with a glue gun, a cutter and a stand

Who they are for

Students building their own exhibition model from a video or a textbook, teachers stocking a tinkering corner, and anyone repairing a working model that has stopped. A pack of parts has no printed report.

How to choose

  1. List the parts your circuit diagram needs before you order: the motor type, the voltage, the number of LEDs and switches.
  2. For anything that has to push a load, such as wheels, pick a gear motor rather than a plain toy motor: it turns slower with more force.
  3. Match the battery to the parts: check the voltage given on each listing.
  4. Add a breadboard and jumper wires if you want to test the circuit before soldering.

Ordering

The Buy button on each product opens its listing on the marketplace, where you pay and see the delivery date for your PIN code. Need a part that is not listed, or many packs for a school workshop? Ask on WhatsApp and we will quote.

What each part is for

The parts most school models are built from. Each links to the matching listings where there are any.

Picking the voltage and size

Most problems with home-built models come from a battery that does not match the parts. A few rules avoid them.

  • Read the rating

    Every motor, LED and bulb is made for a voltage. Check it on the listing or the part and pick a battery close to it.

  • Series or parallel

    Cells in series add their voltage: two 1.5V cells give 3V. Cells in parallel keep the voltage and last longer.

  • Small motors and 9V

    Many small toy motors are made for about 3 to 6V. On 9V they spin faster, heat up and wear out sooner.

  • A resistor with every LED

    Never connect an LED straight to a battery. As a starting point, about 470 ohms keeps one LED safe on 9V.

  • Battery life

    A 9V battery is small and runs a motor only for a while. For a model that runs all day, use AA cells in a holder.

  • Measure the fit

    Check shaft sizes before buying wheels or fan blades, and measure your base before choosing a breadboard or panel.

Testing parts before you build

Ten minutes of testing saves an evening of searching for the one part that does not work.

  • Touch a motor's two wires to a battery for a moment: it should spin, and swapping the wires reverses it
  • Try an LED with its resistor; if it stays dark, turn it round (the longer leg goes to plus)
  • Measure batteries with a multimeter: one reading well below its rated voltage is weak
  • Use the multimeter's continuity beep to check wires, joints and switches
  • Check a solar panel in direct sunlight before fixing it to the model
  • Build on a breadboard first, and solder only when the circuit works
  • Keep the packaging until everything has been tested

For an order placed on a marketplace, replacements and returns follow the marketplace's own policy: start from your order page there.

Storing parts

Parts kept well are ready for the next project, the next repair or the next class.

  • Batteries

    Store them out of the model in a cool, dry place. Cover 9V terminals and never keep cells loose with coins or keys.

  • Small parts

    A box with compartments, labelled by part and value, saves time at every build.

  • Chips and sensors

    Keep ICs in their tube or foam so the pins stay straight, and handle sensors by their edges.

  • Motors and panels

    Keep motors dry and dust-free, and protect the face of a solar panel from scratches.

  • Wires

    Coil wires loosely: sharp bends break the copper inside the insulation.

  • Away from children

    Button cells and small magnets are dangerous if swallowed. Store them high up and closed.

Repairs

Fixing a model that has stopped working

Most stopped models have one simple fault. Work through it in this order and you usually find it in minutes.

  1. Start with the battery

    A flat battery is the most common fault. Measure it, or try a fresh one first.

  2. Check the switch

    Bridge the switch with a wire for a moment. If the model runs, replace the switch.

  3. Follow the wires

    Look for a loose joint, a broken wire or a snap connector that has come off.

  4. Test each part

    Connect the motor, LED or buzzer straight to a battery (an LED with its resistor) to find the one that failed.

  5. Replace like for like

    Order a part of the same type and voltage as the one you are replacing.

  6. Test before the day

    Run the repaired model for a while at home, then take the battery out until the show.

Tip: A basic multimeter makes every one of these steps quicker.

Questions about Components and Spares

Still have a question?

Chat on WhatsApp
Which motor do I need for my project?

For a fan or a propeller, a small DC toy motor. For wheels that must push a model along, a BO gear motor, which is slower but much stronger. Check the voltage on the listing against your battery.

Can I run a small motor on a 9V battery?

Many small toy motors are made for about 3 to 6 volts. On 9V they spin faster, heat up and wear out sooner, so check the rating; two or three AA cells in a holder often suit them better.

Why does my LED not light up?

It may be the wrong way round (the longer leg goes to plus), it may have burnt out if it was connected without a resistor, or the battery may be flat. Test it with a fresh battery and a resistor.

Do I need to solder?

Not to test. Build on a breadboard with jumper wires first. Solder onto a zero PCB only when the circuit works and you want it permanent, with an adult beside you.

Can I order parts in bulk for a school lab or workshop?

Yes. Send the list of parts and the quantities on WhatsApp and we will quote.

A part arrived damaged. What do I do?

For an order placed on a marketplace, use your order page there: replacements and returns follow the marketplace's policy. Test parts as soon as they arrive, so there is time to sort it out.

Free to read

Free ebooks on parts and circuits

Read them before you choose, while you build and the night before you present.

All free ebooks

Keep browsing

The whole store
WhatsApp us