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The Sound-Controlled Clap Switch DIY Kit is a fun and educational electronics project that lets you control devices with a simple clap. Designed for DIY enthusiasts, students, and hobbyists, this kit helps you explore audio amplification and bistable circuit technology while providing a practical application for sound-based control. It’s an engaging way to develop soldering skills and learn about electronic components.
Kit Model: PSK-1
Operating Voltage: 4.5-5V
PCB Dimensions: 28 × 49mm
Q1 and Q2 form a two-stage audio amplification circuit. The audio signal received by MK1 is coupled through capacitor C1 to the base of Q1. After amplification, the signal is fed directly from the collector of Q1 to the base of Q2, where a negative square wave is generated at Q2's collector to trigger the bistable circuit.
Resistor R1 and capacitor C1 limit the circuit’s frequency response to around 3kHz, which is the optimal sensitivity range. When the power is connected, the bistable circuit starts with Q4 in a cutoff state and Q3 in saturation, leaving D3 off.
When MK1 detects a control signal, it passes through the two-stage amplifier, generating a negative square wave. After differentiation, the resulting negative pulse is applied through D1 to the base of Q3, causing the circuit to flip, turning D3 on. Upon receiving another control signal, the circuit flips again, turning D3 off.
The circuit board includes a J1 terminal for connecting external devices. By connecting a relay via J1, other equipment can be controlled through sound activation. (When connecting a relay, a diode should be placed across the relay coil for reverse polarity protection.)
Distributors are not eligible for free shipping.
We offer competitively priced DHL/FedEx shipping service with tracking to ensure the beloved products will be delivered to you safely and timely (import duty excluded).
Asia: 2-5 Business Days
Western EU: 5-7 Business Days
Eastern EU: 5-7 Business Days
North America: 5-7 Business Days
Australia: 5-7 Business Days
South America: 7-10 Business Days
Africa: 7-10 Business Days
Currently, we store our products in Shenzhen, and we are opening our warehouse in Munich, Germany and Seattle, US in 2024. Overseas warehouse suppliers help to pick, pack and ship your parcel with lower shipping costs, faster delivery and custom free. This service will soon be valid for Europe and the US and we will expand overseas warehouses to other countries in the near future.
Germany DHL Paket Expedited:
1-3 Business Days, tracked, not insured, delivery normally from 9:30 a.m to 7:30 p.m.
European Union DHL Paket Expedited:
3-5 Business Days, tracked, not insured, delivery normally from 9:30 a.m to 7:30 p.m.
US DHL Smart Mail Plus Expedited:
3-5 Business Days, tracked, not insured, delivery normally from 9:30 a.m to 7:30 p.m.
DGM Smart Mail Expedited:
3-5 Business Days, tracked, not insured, delivery normally from 9:30 a.m to 7:30 p.m.
OpenELAB's current INCOTERM is FOB Shenzhen which doesn't include custom fee. You should expect to pay any amount charged by the government in your respective country. This includes, and is not limited to, duties, taxes and any extra fees charged by the courier company. We will not hold responsible for any extra charges once the original package has been shipped. If the customer refuses to pay these extra charges, the return shipping and any additional fees will be taken out of the cost of the order, with any remaining funds being refunded to the customer.
Customs are quite different in each country. please comment while you are placing order about the requirements, we will support as much as possible.
Customs, Duties and Taxes for UK and DE warehouses
How is VAT charged when the Customer places an order from OpenELAB (UK and DE warehouses)?
In accordance with the newest VAT e-commerce rules in EU, OpenELAB shall have the right to charge the amount of VAT. The standard rate of actual VAT applied is subject to the European governments' freedom to set the number and level. Such an amount of VAT will be charged when you place an order from OpenELAB. Please contact OpenELAB if you have any questions when you pay such VAT.
What kind of fee will be charged without VAT (UK and DE warehouses)?
Except for the VAT, OpenELAB will charge any handling fee when you are placing any purchase orders, which includes but not limited to customs duty, import VAT and freight costs, etc. Customs duty and import VAT will be paid on the importation of goods from outside the EU into an EU country, and such amount is calculated as a percentage of the customs value of goods.
Please note that it may take 1-2 working days for DHL/FEDEX or 7-10 working days for registered airmail services for the status to update from "Shipped" to "Traceable".
Effective Date: March 25, 2024
OpenELAB guarantees to provide accurate descriptions and high-quality products. If you encounter any problems with any executed purchase order, please notify OpenELAB within 60 days from the date of shipment.Receive our latest updates about our products & promotions.
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