For assembly, you need a soldering iron and accessories that are not an integral part of this kit.
Note: The PCB that comes in the package may differ slightly from the one shown in the picture, but the general layout of the components and their markings are identical.
Important: Be careful with the orientation of the components where polarity matters (diodes D1 and D2, capacitors C1 and C2) and follow how they are shown on the circuit board, as well as the orientation of the NE555 IC (the slot on the top of the chip package should match the slot drawn on the circuit board).
The package contains*:
- printed circuit board (PCB)
- 30 kΩ resistor** (R1)
- two 22 kΩ resistors** (R2 and R3)
- 47 kΩ resistor** (R4)
- two 1N4148 diodes*** (D1 and D2)
- 100 µF electrolytic capacitor (C1)
- 10 µF electrolytic capacitor (C2)
- 0.033 µF ceramic capacitor (C3, 333)
- NE555 IC (NE555 or U1)
- pushbutton (SW1)
- 0.5W 8Ω speaker (LS1)
- 4x AA battery holder (BT1)
- 10 cm wire for connecting the speaker
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* in brackets are the component designations on the PCB
** resistor ribbon colors:
- orange, black, black, red, brown = 30 kΩ ± 1%
- red, red, black, red, brown = 22 kΩ ± 1%
- yellow, purple, black, red, brown = 47 kΩ ± 1%
*** the black end of the diode corresponds to the white thickening on the board, the orientation of the diode is important!
