3-12V GSM Mobile Phone Signal Flashlight DIY Kit Electronic Circuit

Welcome To My Shop : Budayakan Membaca Sebelum Membeli Barang Yang Anda Lihat Ini Barang PO (Pre-Order) Produk Import ( Luar Negri ) Pengiriman Super Cepat, Kebanyakan Barang Yang Kami Kirimkan 7-12 Hari Sudah Sampai Packing Aman dan Secure Produk Original Harap Chat Terlebih Dahulu Sebelum Order Untuk Ketersedian Barang DiGudang Import Happy Shopping ! 3-12V GSM Mobile Phone Signal Flashlight DIY Kit Electronic Circuit Training Suite Instructions phone calls lights:Phone calls phone calls lights kit can be used to sense the GSM signal display, sensing distance up to 1 m, is a very interesting DIY module.Electrical characteristics:Supply voltage: 3 to 12VSensing distance: about 1 mPCB board size: 2.2cm * 2.8cmScope: GSM mobile phone signal, for CDMA phones are uselessNote: This is a DIY kit, you need to assemble it.The circuit theory:The main circuit is amplified antenna sensor signal circuit and circuit. Sensing signal through the antenna 3 to S8050 transistor amplifier to drive the LED, so that light up. When no signal is detected, no calls or no GSM phones, LED circuit is not only detects the signal to light up LED.Inductance of production:Inductance 0.25 to 0.5MM enameled available in pen core above can be around 5-10 laps. After a good round with a blade to scrape paint inductor 2, so we go soldered to the NS - 1169222