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Specification
Brand : YJYGR
BulletPoint1 : 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.
BulletPoint2 : In the circuit, R2, R3, R4, RP1, C1 and VT1 constitute a single junction transistor oscillator circuit, which is used to generate trigger pulses.
BulletPoint3 : When the capacitor is charged by R4 and RP1, the voltage Ue increases gradually.
BulletPoint4 : 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.
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CurrentRating : 10 amps
ExternallyAssignedProductIdentifier : 8691415905091
ItemName : YJYGR 5pcs LED Display Module Kit DIY BT33 Table Lamp Dimmable Optical Circuit Kit DIY kit Module Board
ItemPackageQuantity : 1
ItemTypeKeyword : printer-memory
Manufacturer : YJYGR
MaximumSwitchingCurrent : 10 amps
MaximumSwitchingVoltage : 40 volts
MeasurementSystem1 : Imperial
MeasurementSystem2 : Metric
NumberOfItems : 1
OperationMode : Automatic
PartNumber : 652573979
ProductDescription : We check as much as possible to make sure the item is what you need.

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Description:

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:

10 x DIY BT33 Table Lamp Dimmable Optical Circuit Kit
ProductSiteLaunchDate : 2021-08-31T02:19:19.784Z
Style : Manual
UnspscCode : 43211900