Coin Radio is a fun and exciting radio designed for children. It is designed as a novelty way of interacting with the radio compared to the traditional radio design. The child will insert a coin into the top of the radio and watch the coin descend down to the bottom. When reaching the bottom the coin will turn the radio on.
VIEW VIDEO BELOW TO SEE RADIO WORKING
Step 1: Exploded isometric view
Part Number Part title Material Process Quantity
1 220x5mm side Acrylic plastic Laser cut 4
2 220x180mm front middle back Acrylic plastic Bandsaw 3
3 120x5mm slats Acrylic plastic Laser cut 4
4 207x107mm top and bottom Plywood Bandsaw 2
5 handle Plywood Bandsaw 1
6 Grill Plywood Laser cut 1
7 scoop Plywood craft knife and glue 1
8 Battery box with 2x1.5v batteries ----------- -------------- 1
9 107x50mm sides Plywood Bandsaw 1
10 220x50 front and back plywood Bandsaw 2
11 6mm rods plywood Bandsaw 2
12 Dials metallic Bought 2
13 140x5mm Acrylic plastic Laser cut 1
14 Speaker -------------- ------------ 1
Step 2: Hacking a radio
We started this project by being given a small portable sony radio. Simply taking the back and front off it left us with the circuit board speakers and ariel. For power it is easier to buy a small battery box suitbale to hold two 1.5Volt batteries.
Step 3: Enhancing the circuit board
at this stage the circuit board should be fully detached from the original plastic casing. The next thing that should be done is attaching a micro switch between the battery box and the circuit to act as a switch when the coin hits it. when the coin hits the switch it will have to land in a bucket of some sorts so add a small shaped scoop onto the end on the micro controller switch for the coin to rest in.
When the coin lands on the scoop it will switch on the micro switch and in turn will complete the circuit and the radio will play.