Title
Three Stage Intruder Radio Alert System: An Innovation for High Level Security,Used
Delivery time: 8-12 business days (International)
The level of security in any organization/establishment determines its growth and productivity. This project 3Stage Intruder Radio Alert System seeks to eliminate the high level of unreliability usually encountered with human security systems. The design incorporates two modules: The transmitter and the receiver module. The intruder detection actually takes place at the transmitter module in three stages using photo sensors mounted at strategic points within the premises of intrusion. The first and second stages produce audio and visual alerts respectively whereas at the third stage, the signal from the third sensor is builtup, amplified and transmitted over a distance to a remote receiver to trigger both audio and visual alerts simultaneously. The design comprises group circuits such as power supply unit, modulators and demodulator, and discrete component such as photo sensors, resistors, SCRs, diodes, capacitors, inductors and comparator (Operational Amplifier).
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We ship your order within 2–3 business days for USA deliveries and 5–8 business days for international shipments. Once your package has been dispatched from our warehouse, you'll receive an email confirmation with a tracking number, allowing you to track the status of your delivery.
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To facilitate a smooth return process, a Return Authorization (RA) Number is required for all returns. Returns without a valid RA number will be declined and may incur additional fees. You can request an RA number within 15 days of the original delivery date. For more details, please refer to our Return & Refund Policy page.
Shipping & Returns
Shipping
We ship your order within 2–3 business days for USA deliveries and 5–8 business days for international shipments. Once your package has been dispatched from our warehouse, you'll receive an email confirmation with a tracking number, allowing you to track the status of your delivery.
Returns
To facilitate a smooth return process, a Return Authorization (RA) Number is required for all returns. Returns without a valid RA number will be declined and may incur additional fees. You can request an RA number within 15 days of the original delivery date. For more details, please refer to our Return & Refund Policy page.
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We provide a 2-year limited warranty, from the date of purchase for all our products.
If you believe you have received a defective product, or are experiencing any problems with your product, please contact us.
This warranty strictly does not cover damages that arose from negligence, misuse, wear and tear, or not in accordance with product instructions (dropping the product, etc.).
Warranty
We provide a 2-year limited warranty, from the date of purchase for all our products.
If you believe you have received a defective product, or are experiencing any problems with your product, please contact us.
This warranty strictly does not cover damages that arose from negligence, misuse, wear and tear, or not in accordance with product instructions (dropping the product, etc.).
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Secure Payment
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
We accept payments with :
Visa, MasterCard, American Express, Paypal, Shopify Payments, Shop Pay and more.