Kitronik Rear Bike Light Manual Download Page 8

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This easy build bike light kit has just ten
parts, making it a good introduction to
electronics. The kit uses two ultra
bright red LEDs, which flash rapidly,
providing a highly visible light. Making it
ideal for use as a rear bike light.

Note: We recommend this rear bike
light is used in conjunction with a
commercially available light.

For more information on RoHS and CE please visit kitronik.co.uk/rohs-ce. Children

assembling this product should be supervised by a competent adult. The product contains

small parts so should be kept out of reach of children under 3 years old.

WARNING

Contents may inspire creativity

0845 8380781

www.kitronik.co.uk

[email protected]

TOOLS REQUIRED:

- Soldering Iron

- Solder

- Wire Cutters

KIT REQUIRES

2 x AA batteries

STOCK CODE

2106 or 1006 (Retail Version)

INSTRUCTIONS:

This booklet contains build instructions

and a circuit explanation. For more

detailed resources please visit our

website at www.kitronik.co.uk/2106

Designed & manufactured
in the UK by

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Summary of Contents for Rear Bike Light

Page 1: ...REAR BIKE LIGHT KIT MASTER THE ART OF SOLDERING WITH THIS ...

Page 2: ...The shape of the device should match the outline on the PCB 2 Before you start take a look at the Printed Circuit Board PCB The components go in the side with the writing on and the solder goes on the side with the tracks and silver pads PLACE THE CAPACITORS Place the two capacitors into the board where it is labelled C1 and C2 Make sure the device is the correct way around The capacitors have a s...

Page 3: ...lder them in at a specific height depending upon how you have designed your enclosure if you are making one Once you are happy solder them into place 4 FIT THE BATTERY HOLDER Finally you must attach the battery holder Start by feeding the leads through the strain relief hole near R3 The wire should be fed in from the rear of the board see lower image The red lead should be soldered to the terminal...

Page 4: ... board instead ADDING AN ON OFF SWITCH Solder one end of the battery cage to the PCB either black to or red to 1 Solder the other end of the battery cage to the on off switch 2 Using a piece of wire solder the remaining terminal on the on off switch to the remaining power connection on the PCB 3 ...

Page 5: ...ads are soldered Pins next to each other are not soldered together The shape of the transistors match the outline on the PCB The flat edge of each of the LEDs matches the outline on the PCB The on the capacitors match the same marks on the PCB The colour bands on R3 are orange orange and black The battery cage red and black wires match the red black text on the PCB MECHANICAL DETAILS 48 5 4 x 3 3m...

Page 6: ... 7V The voltage at the base of Q2 starts to rise as C1 charges as they are both connected to each other As C1 has less than 0 7V across it Q2 is turned off This means LED2 is not connected to 0V and is therefore turned off C2 which has more than 0 7V across it is gradually discharging into the base of Q1 This continues until the C1 has sufficient charge to produce a voltage 0 7V on the base of Q2 ...

Page 7: ...se be HOW THE BIKE LIGHT WORKS Q2 is now turned on which connects LED2 and C2 to 0V This turns LED2 on This connection of C2 to 0V causes the voltage across it to drop below 0 7V turning off Q1 Now C2 starts to charge through the resistor R2 causing the voltage across it to increase The voltage at the base of Q1 starts to rise as C2 charges as they are both connected to each other As C2 has less t...

Page 8: ...d be supervised by a competent adult The product contains small parts so should be kept out of reach of children under 3 years old WARNING Contentsmayinspirecreativity 08458380781 T www kitronik co uk W support kitronik co uk E TOOLS REQUIRED Soldering Iron Solder Wire Cutters KIT REQUIRES 2 x AA batteries STOCK CODE 2106 or 1006 Retail Version INSTRUCTIONS This booklet contains build instructions...

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