3pcs diy bt33

Description: The dimming circuit can make the voltage at both ends of the bulb change in the range of tens to 200 volts, and the dimming effect is remarkable. In the circuit, R2, R3, R4, RP1, C1 and VT1 constitute a single junction transistor oscillator circuit, which is used to generate trigger pulses.When the capacitor is charged by R4 and RP1, the voltage Ue increases gradually. When the Ue reaches the peak voltage, e B1 turns on and the voltage on the capacitor outputs a pulse voltage to R2 via e-b1. Because the resistance of R4 and RP1 is large, when the voltage on capacitor drops to the trough voltage, the current supplied by R4 and RP1 is less than the trough current, which can not meet the conduction requirements, so the single-junction transistor restores the blocking state. Thereafter, the capacitor recharges and repeats the above process. As a result, a sawtooth wavy voltage is formed on the capacitor and a pulse voltage is formed on R2. During each half cycle of AC voltage, the single-junction transistor will output this pulse to trigger the gate of the thyristor, which will turn on the thyristor and light up the lamp. Change the resistance value of RP1, that is, change the oscillation frequency of sawtooth wave, thus change the size of thyristor conduction angle, and then change the output voltage of controlled rectifier circuit to achieve the purpose of adjusting the brightness of the bulb. Input voltage: 220V Size: 45 x 30mm Package Included: 3 x DIY BT33 Table Lamp Dimmable Optical Circuit Kit

3Pcs DIY NANO IO Shield V1.O Expansion Board For Arduino Description: A product for Arduino that works with official Arduino boards Compact size Leads all pins out, convenient for wiring and doing experiments Note: Need to DIY it. Package included: 3 x  DIY NANO IO Shield V1.O Expansion Board

3Pcs DIY 4 Slot 18650 Battery Holder With 8 Leads Feature: Input Voltage 3.7V Output Voltage 14.8V Package included: 3 x DIY 4 Slot 18650 Battery Holder With 8 Leads

3pcs DIY 12V 8 x AA Battery Holder Box Case With Leads Switch Feature:Material: ABS impact resistant materialHardware: Nickel-plated steelSpring: Nickel-plated steelRivet: NoneWire: 1007 # 26AWGColor: BlackPackage included:3 x DIY 12V 8 x AA Battery Holder Case Box With Leads Switch

3Pcs DIY Infrared Laser Aiming Anti-theft Burglar Alarm Module Kit

3pcs DIY OTL Discrete Component Power Amplifier Kit Electronic Production Kit

FAST AFFORDABLE COURIER SHIPPING TO SOUTH AFRICA Description: The dimming circuit can make the voltage at both ends of the bulb change in the range of tens to 200 volts, and the dimming effect is remarkable. In the circuit, R2, R3, R4, RP1, C1 and VT1 constitute a single junction transistor oscillator circuit, which is used to generate trigger pulses.When the capacitor is charged by R4 and RP1, the voltage Ue increases gradually. When the Ue reaches the peak voltage, e B1 turns on and the voltage on the capacitor outputs a pulse voltage to R2 via e-b1. Because the resistance of R4 and RP1 is large, when the voltage on capacitor drops to the trough voltage, the current supplied by R4 and RP1 is less than the trough current, which can not meet the conduction requirements, so the single-junction transistor restores the blocking state. Thereafter, the capacitor recharges and repeats the above process. As a result, a sawtooth wavy voltage is formed on the capacitor and a pulse voltage is formed on R2. During each half cycle of AC voltage, the single-junction transistor will output this pulse to trigger the gate of the thyristor, which will turn on the thyristor and light up the lamp. Change the resistance value of RP1, that is, change the oscillation frequency of sawtooth wave, thus change the size of thyristor conduction angle, and then change the output voltage of controlled rectifier circuit to achieve the purpose of adjusting the brightness of the bulb. Input voltage: 220V Size: 45 x 30mm Package Included: 1 x DIY BT33 Table Lamp Dimmable Optical Circuit Kit DIY BT33 Table Lamp Dimmable Optical Circuit Kit LED Display Module Kit DIY BT33 Table Lamp Dimmable Optical Circuit Kit LED Display Module Kit DIY BT33 Table Lamp Dimmable Optical Circuit Kit LED Display Module Kit

FAST AFFORDABLE COURIER SHIPPING TO SOUTH AFRICA Feature: Two-color LED strobe fun DIY kit parts produced. Simple and practical, easy installation, low power consumption. Technical specifications: Product Name: DIY Flash Kit Color: Two color in random Dimensions: 9x3cm / 3.54 "x1.18" Voltage: 3-5V Package Included: 3 x Flash Kit DIY (with battery box) 3 x Instructions 3pcs DIY Two-color LED Flashlight Electronic Kit Circuit Board 3pcs DIY Two-color LED Flashlight Electronic Kit Circuit Board 3pcs DIY Two-color LED Flashlight Electronic Kit Circuit Board

FAST AFFORDABLE COURIER SHIPPING TO SOUTH AFRICA Description: Welding exercises for beginners Overall beautiful and practical Board Diameter: 6.1cm/2.4Inch Package Included: 3 x DIY 4017 Running Water Light Kit 3pcs DIY 4017 Running Water Light NE555 LED Horse Race Lamp Flash Kit 3pcs DIY 4017 Running Water Light NE555 LED Horse Race Lamp Flash Kit 3pcs DIY 4017 Running Water Light NE555 LED Horse Race Lamp Flash Kit

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