5pcs diy metal

Feature: Supply voltage: 3-5V Dimensions: 66 x 61MM Maximum detection range: 5CM (Best detection range: 1 CM - 2 CM) Principle explanation:   Q1, L1, L2, C2, C3, R1, W composed of high-frequency oscillation circuit, adjustment potentiometer W, you can change the oscillation stage gain, the oscillator oscillating in a critical state, that is just the oscillator start-up. Q2, Q3 when the composition of the detection circuit, the circuit normally oscillate voltage AC voltage exceeds 0.6V, Q2 will be in the negative half cycle of conducting the C4 discharge short circuit, resulting in Q3 ends; when it detects metal objects near the coil L1, will be metal conductor eddy current is generated, the oscillation circuit of the energy loss increases, positive feedback weakened in the critical state of the oscillator weakened, if not impossible to maintain the minimum required energy oscillations and to stop, so Q2 is turned off, R2 to C4 charge, Q3 is turned on, pushing the buzzer sounds. According to whether the sound, you can determine whether the detection coil underneath the metal object. Note: If you need longer detection range and higher sensitivity, please create their own search coil, search coil diameter of the larger suppliers will be farther away from the probe. Package included: 5 x DIY Metal Detector Kit 

Feature: Supply voltage: 3-5V Dimensions: 66 x 61MM Maximum measure range: 5CM (Best measure range: 1 CM - 2 CM) Principle explanation: Q1, L1, L2, C2, C3, R1, W composed of high-frequency oscillation circuit, adjustment potentiometer W, you can change the oscillation stage gain, the oscillator oscillating in a critical state, that is just the oscillator start-up. Q2, Q3 when the composition of the measure circuit, the circuit normally oscillate voltage AC voltage exceeds 0.6V, Q2 will be in the negative half cycle of conducting the C4 discharge short circuit, resulting in Q3 ends; when it measure metal objects near the coil L1, will be metal conductor eddy current is generated, the oscillation circuit of the energy loss increases, positive feedback weakened in the critical state of the oscillator weakened, if not impossible to maintain the minimum required energy oscillations and to stop, so Q2 is turned off, R2 to C4 charge, Q3 is turned on, pushing the buzzer sounds. According to whether the sound, you can determine whether the measure coil underneath the metal object. Note: If you need longer measure range and higher sensitivity, please create their own search coil, search coil diameter of the larger suppliers will be farther away from the probe Package included: 5 x DIY Metal Measure Kit

5Pcs DIY Electronic SMD Components Solder Practice Plate Kit For Training Description: Electronic DIY kit SMD components solder practice plate for training w/ 8 categories components Features: Including 8 categories 75pcs components, with corresponding test point 1. Resistor– 0805(30pcs, one row in series, with test point) 2. Resistor– 0603(10pcs, all in series, with test point) 3. Exclusion– 0603(7pcs, all in series, with test point) 4. Capacitor– 0805(14pcs, all in series, with test point) 5. Diode– 3216(6pcs, all in series, with test point) 6. Triode– SOT-23(6pcs, with test point) 7. Integrated chips– SO-14(2pcs, with test point) 8. Integrated chips– LQFP44(2pcs, with test point) Package included: 5 x DIY SMD Components Solder Practice Plate Kit

5Pcs DIY FM Wireless Microphone Electronic Kit FM Electronic Production Parts Training

5pcs DIY 3-Tube Wireless Microphone Kit Wireless Microphone Module Electronic Manufacture Kit

5Pcs DIY Double Color LED Flash Lights Kit Electronic Production NE555+CD4017 Practice Learning Kit

5pcs DIY LM7806/LM7809/LM7815 Three Terminal Regulator Module 5V Voltage Regulator Module Kit

5pcs DIY DC 7.4V 2 Slot Double Series 18650 Battery Holder Battery Box With 2 Leads Package contains 1 X item of the smallest listed variant.

5Pcs DIY NE555 Electronic Organ Teaching Kit Package contains 1 X item of the smallest listed variant.

5pcs DIY LM7806/LM7809/LM7815 Three Terminal Regulator Module 5V Voltage Regulator Module Kit Package contains 1 X item of the smallest listed variant.

Buy 5pcs DIY Electronic Kit Set Metal Electronic Parts DIY Soldering Practice Board for R317.25

FAST AFFORDABLE COURIER SHIPPING TO SOUTH AFRICA Note: This is a DIY kit, you need to assemble it, easy to install, not supply instructions. Working principle: When no light hits the photosensitive resistor, the transistor turns on and the buzzer gets the power to start tweeting. When there is light on the photosensitive resistor, the transistor is turned off, the buzzer is powered off, stop tweet. Transistor used here as an electronic switch. Feature: Laser: 5mw Working voltage 3V Package includes: 5 x DIY Infrared Laser Kit 5Pcs DIY Infrared Laser Aiming Anti-theft Burglar Alarm Module Kit 5Pcs DIY Infrared Laser Aiming Anti-theft Burglar Alarm Module Kit 5Pcs DIY Infrared Laser Aiming Anti-theft Burglar Alarm Module Kit

Buy 5pcs DIY Electronic Clapping Voice Control Switch Module Kit Induction Training DIY Production Kit for R193.95

Buy 5pcs DIY Digital Electronic NE555 Multi-wave Signal Generator DIY Kit Electroni for R292.98

Buy 5pcs DIY Electronic Kit Set Cartoon Bear LED Flash Light Production Kit Simple Flash Parts DIY Sk... for R189.00