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Crumble Blog 5

TTS Crumble Blog 5 Operating instructions

  • Hello! I've reviewed the instructions for building the Nightlight TE10001. This document provides instructions on how to assemble the night light using a Crumble controller and various components, including a light sensor. This light sensor is used to control the built light. I'm here to help answer any questions you might have about building your own nightlight.
  • What is needed to make nightlight?
    How does the nightlight work?
    How is the light sensor connected?
    How do I turn the nightlight off?
1 Make a nightlight - Crumble blog 5
www.tts-shopping.com
Crumble blog 5
Product Code: TE10001
Make a nightlight
2 Make a nightlight - Crumble blog 5
Follow this step-by-step guide on how to make a nightlight.
Associated resources:
Crumble lesson plan
Crumble PowerPoint – nightlight
Crumble blog 1 – set up the controller
Crumble workbook 5 – nightlight
You will need:
Parts included in class kit
▪ 1 Crumble controller unit (see Crumble blog 1)
▪ 1 square of corrugated plastic 12.5cm x 12.5cm
▪ 1 cardboard craft roll
▪ 1 strip of corrugated plastic 1.5cm x 39cm (the
corrugations must be across the strip, not along it)
▪ 4 crocodile leads
▪ 1 light sensor (this can be either an LDR [older kits]
or a phototransistor [newer kits])
▪ 1 lamp
▪ 1 lamp holder
▪ 3 card discs
▪ Coloured gems
Other parts, tools and consumables
▪ Paint & paintbrush (optional)
▪ Pair of compasses
▪ Large scissors
▪ Double sided tape
▪ Ruler
▪ Pencil
▪ Cool melt glue gun & glue sticks
▪ Computer (see Crumble blog 1)
Step 1
Paint your craft roll and/or card discs and leave them
to dry (optional).
Step 2
To make the candle holder, use the protractor to mark
out a circular base on the square of corrugated plastic
and cut it out. To make the handle, cut a slot in two of
the card discs and slot them onto the edge of the base,
gluing them firmly in place. Glue the strip of corrugated
plastic around the edge of the base, starting with one
end butted up against the handle. Trim the other end so
that it also butts up against the handle.
Step 3
Take the third card disc and use the
nose of the scissors to enlarge the hole
in the middle until the nose of the bulb
holder can just be pushed in (it should
be a tight fit). To do this, push the nose
of the scissors into the hole and rotate
the scissors to make a smooth round
hole. Trim off any rough edges.
3 Make a nightlight - Crumble blog 5
Step 4
Glue the bulb holder to the card disc. Clip two
crocodile leads firmly to the lamp terminals
(screws) from underneath. Cut a vee 0.8cm long
in the bottom of the craft roll. Feed the crocodile
leads down through the craft roll and glue the
card disc to the top of the craft roll.
Step 5
Tuck the crocodile leads into the vee and glue
the bottom of the craft roll firmly down onto the
base, with the crocodile leads sticking out.
Step 6
Cut a 1.2cm x 1.5cm rectangle from corrugated plastic
offcuts. Use the double-sided tape to stick it onto the
bottom of the light sensor (the side without the
components – see the photos in Step 8). Glue the other
side of the plastic firmly down onto the base. Clip the two
remaining crocodile leads onto the terminals on either side
of the light sensor. Cut notches in the side of the candle
holder and feed the crocodile leads out through them.
Step 7
Connect the two crocodile leads from the
lamp terminals to the Motor 1 terminals on
the Crumble. It doesn’t matter which way
round these are connected. If you have the
2xAA battery holder, clip the battery snap
onto the battery holder terminals. If you
have the 3xAA battery holder, switch it on.
Step 8
Identify whether your light sensor is an LDR or a phototransistor. The components are labelled, and
photos of each are given below.
Phototransistor LDR
Top Top
Bottom Bottom
4 Make a nightlight - Crumble blog 5
Step 9
Connect the two crocodile leads from the light sensor to terminals C and D on the Crumble. If you
have a phototransistor then it is labelled + and -. Connect the + side to D and – side to C. If you have
an LDR then it doesn’t matter which way round it is connected.
Connecting up the Phototransistor Connecting up the LDR
Step 10
Construct and run the following program. This program sets the
output D to high. It then checks if the signal received at C is low and
if so, it switches on the lamp. Cover the light sensor with your hand
and check the lamp lights up. Take your hand away, and the lamp
should go off.
(The light sensor is a component whose characteristics change with
the light level. When light falls on it, it will conduct more easily, so if
D is set to high then C will also be high. If the light sensor is in the
dark then it becomes less conductive, and so C becomes low and
the lamp comes on.)
Step 11
Decorate your candle and candle holder.
Step 12
Switch off (if you have the 3xAA battery holder) or unclip the battery snap from the battery holder (if
you have the 2xAA battery holder) when not in use to avoid draining the battery.
Copyright © Caroline Alliston 2022
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