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555 pulse width control controller kit, electronic assembly kit, can be used for school electronic production training, electronic enthusiasts assembly use.
Principle: D1 is used to prevent the power supply from reversing the NE555, D2, C1, R1, R2, W1, IC1 pulse width adjustable pulse generator, adjust the potentiometer W1 U1 NE555 output pulse frequency and pulse width change The The output pulse is driven by R3, R4, R5, Q1, Q2 to adjust the speed of the motor. D3, C5 to eliminate the motor generated by the back electromotive force to protect the transistor. C2, C4 for power supply filtering, C3 for the stability of the reference voltage to eliminate interference.
2.Finished Product Picture:
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|Shipping Company||Shipping Cost||Estimated Delivery Time|
|3 - 7 days|
|3 - 7 days|
|5 - 14 days|
|Post Air Mail||Free Shipping||15 - 45 days|
|Return Policy||If the product you receive is not as described or low quality, the seller promises that you may return it before order completion (when you click "Confirm Order Received" or exceed confirmation timeframe) and receive a full refund. The return shipping fee will be paid by you. Or, you can choose to keep the product and agree the refund amount directly with the seller.
N.B.: If the seller provides the "Longer Protection" service on this product, you may ask for refund up to 15 days after order completion.
|Seller Service||On-time DeliveryIf you do not receive your purchase within 60 days, you can ask for a full refund before order completion (when you click "Confirm Order Received" or exceed confirmation timeframe).|
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