Number part name quantity
1 12 MHZ crystal vibration 1
2 10 kΩ resistance 6
3 10μF capacitance 1
4 20 needle socket 1
5 AT89C2051 1
6 Piezo Sounder 1
7 8550 PNP transistor 1
8 1k Ω resistance 1
9 photoresistance 5
10 3 v laser tube 5
11 a battery pack 1
12 wood block 3
13 Pin and socket some
14 brasen sockets and screws some
15 hole plate 1
You can get the electric components at http://kynix.com.
The overall structure：
The laser harp consists of three pieces of wood which is fixed into the shape of a harp with screws and hot melt adhesive.
In the block above we install 5 3.0Vlaser tubes, and use hot melt adhesive to fix to the block below.
With a 0.8 mm drill hole, we install the corresponding five photosensitive resistance, which forms the foundamental base.
Then, in the right place I put No.5 battery box which is also fixed with hot melt adhesive.
Then, according to the principle diagram of the power supply, we connect the corresponding wire to socket which is for later connection and upgrade.
Finally, we connect it to the circuit board base.
We have made two kinds of circuits of base. The one we use AT89C2051 and the other ATMEGA8.
Of course, performance and effect are different.Because the material is limited, we only make five strings.
The circuit principle diagram of 51 MCU:
The production welding is very simple and they are DIP components. We use insulation sleeve line according to the principle diagram and connect the corresponding pin.
Ok, you can also enjoy the pleasure of magic no-stringed harp!