Getting Started with Electronics
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Internal Reference: KIT-126

What this kit has in store for you!

  • 7 projects
  • 3 bonus projects
  • Cut-out Diagrams
  • 7 fundamental principles of electronics
  • 15+ educational videos

NOTE: Alligator clips are not included in the kits.

Serie connection with light bulbs:

2 x 3V bulbs are connected in series to a 3V battery to demonstrate that the bulbs glow very poorly because the voltage is being divided between the 2 light bulbs which means that every light bulb will only receive 1.5V. This will drain the battery slowly since the current is the same everywhere in the circuit.

  Downloadable Diagram

Parallel bulbs:

 2 x 3V light bulbs are connected in parallel to a 3V battery. Both the light bulbs will shine bright since they both receive 3V, but the battery will drain faster since more current is being used by the light bulbs because they are connected in parallel.

  Downloadable Diagram

Parallel batteries:

2 x 1.5V batteries are connected in parallel to each other and to a 3V light bulb. The bulb will glow very poorly since the voltage of the batteries will remain 1.5V because they are connected in parallel to each other. This means that the voltage of the battery will stay 1.5V, but the capacity of the battery will double since there are 2 cells connected to each other.

  Downloadable Diagram

Serie batteries:

2 x 1.5V batteries are connected in series and then connected to a single light bulb. The light bulb will shine bright since the overall voltage of the battery is now 3V. This will mean that the battery will not last as long since the capacity of the battery will remain the same as with a single-cell battery.

  Downloadable Diagram

Motor driver:

The motor driver makes use of a double pole double throw switch which enables you to reverse the output polarity of the switch. When you reverse the polarity on a DC motor, the motor will turn in the opposite direction. This means the direction of the motor can easily be changed when connecting the motor and the 3V battery to the switch.

  Downloadable Diagram

Moisture sensor:

The moisture sensor makes use of a BC557 transistor which is a PNP transistor which is switched on when there is a connection between the test probes. Such a connection will be made when the soil is wet enough and the water will conduct the electricity between the 2 probes. The potentiometer is used to vary the pullup resistance for the base pin of the transistor to adjust the sensitivity of the sensor circuit. The 330R resistors are used to limit the current on the base pin of the transistor and to limit the current that flows through the LED to protect it. When there a conductivity between the probes, the transistor will switch on and complete the circuit between the collector and emitter pin, which means that there is a completed circuit between the positive side of the battery, the LED, and the negative side of the battery which is why the LED will switch on.

  Downloadable Diagram

Day/night switch:

The day/night switch makes use of an NPN transistor with a Pull-up resistor to give a high-level voltage to keep the transistor on. The LDR acts as a pull-down resistor which means that when the light shines on it, the LDR will have less resistance which will change the state of the transistor to switch the LED on. If you want the LED to be off when the light shines on it, the NPN transistor can simply be replaced by a PNP transistor.

  Downloadable Diagram


The electromagnet is 10m enamel copper wire wrapped around a nail and then covered with a sleeve of heat shrink to keep it neatly together. When a 3V battery is connected to it, the flow of electrons will generate a magnetic field around the coil which magnifies the nail as long as there is a power source connected to the coil. when the power source is disconnected, the nail will instantly lose all magnetism.

  Downloadable Diagram

Water level switch:

The water level switch makes use of 4 NPN transistors connected in such a way to form a transistor array. These transistors are switched on separately as the water reaches different levels and reaches each of the test probes. Because there are 4 transistors, this project will have 4 levels at which you can measure the water level. The LEDs should be connected in such a way that the green LED shows when the tank is at a safe water level and the red LED indicates when the water level becomes too high. As the water reaches each test probe. the base of the transistor to which the probe is connected will be switched on which will switch the respective LED on.

  Downloadable Diagram

Reed switch:

The reed switch is connected in series with the LED to the 3V battery. When a magnet is brought close to the reed switch, the LED will turn on and when the magnet is removed from the reed switch, the LED will turn off again.

  Downloadable Diagram