EC Buying Second Generation SMT SMD Component Transistors Welding Practice Board CD4017 NE555 Soldering Skill Training Board Lucky Turntable Flowing Water Light Kit DIY Electronic Kit

Parameters: Product size: 60mm*80mm Plate thickness: 1.6mm Working voltage: DC5V Circuit principle description This circuit is a CD4017+NE555 application circuit. The NE555 constitutes a multivibrator. The pulse oscillation signal is output through the three pins of the NE555 to CD4017 for counting. CD4017 will sequentially output a high level on Q0-Q4 along with the input pulse signal, lighting up the corresponding light-emitting diodes. These light-emitting diodes form a circle, forming the effect of a water lamp. When the CD4017 count reaches 10, the carry terminal C0 changes from low to high, driving the transistor Q1-Q4 to turn on, To light up the light-emitting diodes at the four corners. After the next pulse arrives, the C0 terminal returns to a low level, and the light-emitting diodes at the four corners are extinguished. This cycle continues Component List Chip resistance: 10k; 5pcs; R48 461-R64 Chip resistance: 2M; 1pcs; R49 Chip resistance: 470 ?; 15pcs; R50-R60 R65-R68 Chip capacitance: 0.1uf; 2pcs; C27 C28 Chip diode: IN4148; 4pcs; D12-D15 Red LED: LED; 11pcs; D1-D11 Blue LED: LED; 4pcs; D16-D19 Chip transistor: S8050; 4pcs; Q1-Q4 Chip IC: NE555; 1pcs; U1 Chip IC: CD4017; 1pcs; U2 The following are devices for practicing welding Chip resistance: 0402; 20pcs Chip resistance: 0603; 10pcs Chip resistance: 1206; 8pcs Chip capacitance: 0603; 10pcs Chip diode: LL34; 10pcs SMD transistor: S0T-23; 6pcs Chip IC: S0-14; 2pcs Chip IC: QFP44; 2pcs