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DIY Kit C51 MCU Laser Harp Kit String Electronic Keyboard Kit DIY Module Electric Production Sensor Music Controller

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Description:
Laser harp’s strings is replaced by laser beam. You can play the laser beam as a string. Each beam has a different pitch. It's very creative for you to DIY.

Principle of laser harp:
1>. User only need to move the beam as if the string is moved, and a melody can be played. The laser harp is composed of two parts: a photosensitive resistor and a single chip microcomputer STC89C52.
When the beam emitted by a laser tube is blocked, the corresponding photosensitive resistance is induced and the resistance changes are generated.
The system of eight photosensitive resistors produces the change of high and low potential, and reads the high and low potential changes of the photosensitive resistance by the single chip computer, and completes the input of the operation instruction.
The MCU controls data based on command information to transmit data through serial port, which is assigned to p0^2 port of loudspeaker and P1 port of water lamp to generate corresponding response.

2>. When the laser is irradiated, the MCU reads the voltage of the photosensitive resistance, and it is low level at this time.
When there is no laser irradiation, the MCU reads the voltage of the photosensitive resistance, then it is high level. In this way, when the light of the laser is shielded, the effect of the switch can be produced in the circuit.

3>. The sound frequency of the human ear can be heard from 20Hz to 20kHz, and the frequency of the harp notes should also be in this range.
It's just that different notes have their own fixed frequency. The above audio can be generated by a 16 bit timer with a 52 single chip microcomputer.
For example, the standard sound of the harp is La 440Hz. It can be seen from the calculation that the half cycle of it is 1136 Mu s.
In this way, the square wave of 440Hz can be generated as long as the pin level is jumped in the half cycle.
After the electrical conversion element (horn), the standard sound La can be produced, and the other notes are also produced.

Features:
    1>.There are a total of 7 strings. When the string is cut, the buzzer sends out the corresponding sound level.
    2>. When the string is cut, the LED of the string is lit up. There are a total of 7 LED.
    3>. Play two pieces of music stored by buttons.
    4>. Switch middle and high bass.

 

Finished Product Picture:

Please kindly noted that the Power Interface has Changed to USB Interface since April, 2019. Thanks for your attention!

A. Tested by ICStation's Customer Jule Potter:

  

 

 

B. Tested by ICStation's Outstanding Partner bzoli5706:

Learn More Details in the Video:
(The language in the video is English)

 

C. Tested by ICStation's Outstanding Partner randomtronic:

Learn More Details in the Video:
(The language in the video is English)



E. Tested by ICStation's Outstanding Partner DrakerDG:

Learn More Details in the Video:
(The language in the video is Spanish)

 

F. New!! Tested by ICStation's Outstanding Partner OnlyKit:

Learn More Details in the Video:
(The language in the video is Russia)

 

Quantity5+10+30+
Price$8.85$8.80$8.70
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1. Hongkong / Sinapore Airmail

(1) Due to the high risk of package lost recently, we have to stop using the free shipping way these days. Hope for your kind understanding! And the $3 is for tracking number and delivery insurance ^0^ Enjoy order from us. 

Free Shipping for all orders over $20 ^0^ (with free tracking number and delivery insurance fee)

(2) Shipping time 
Shipping time is 7-20 business days to most of countries; please view below table for exactly shipping time to your location. 

7-15 working days to: Most of Asia countries
10-16 working days to: USA , Canada , Australia , UK , Most of Europe countries
13-20 working days to: Germany , Russia
18-25 working days to: France , Italy , Spain , South Africa
20-45 working days to: Brazil , Most of South America countries

2. EMS/DHL/UPS Express

(1)Shipping Fee: Free for the order which meet the following requirements
Total price of the order >= 200USD or Total weight of the order >= 2.2KG

When the order meets to one of the above requirement, it will be shipped for FREE via EMS/DHL/UPS Express to below country. 
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Oceania: Australia , New Zealand , Papua New Guinea 
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Note: Shipping Fee to other countries, please contact orders@ICStation.com

(2) Shipping Time
Shipping time is 3-5 working day (about 1 week) to most of countries. 

Because the package would be returned to the sender if it had not been signed by the receiver in 2-3 day (DHL) or 1 week (EMS,) or 2 weeks (Registered Email), please pay attention to the arriving time of the package. 

Note:

1) APO and PO Box Addresses

We strongly recommend that you provide a physical address for order delivery. 
Because that DHL and FedEx are unable to deliver items to APO or PO BOX addresses. 
 
2) Contact Phone Number
Receivers' contact phone number is required by express shipping agency for the package delivery. Please provide us with your latest phone number.


3. Note
1) Delivery Time of mixed orders with items in different Shipping Status should be calculated using the longest estimate times listed. 
2) Chinese Holiday Reminder: During annual Chinese holidays, services from certain suppliers and carriers may be affected, and delivery for orders placed around the following times may be delayed by 3 - 7 days: Chinese New Year; Chinese National Day,etc. 
3) Once your order is shipped, you will receive an email notification from icstation.com
4) Track the order which with tracking number via below links:

Registered Airmail: www.17track.net/en

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