A Striking Digital Clock
Cuckoo or chime?
Materials
Gerber file
CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor GREEN and GOLD members can exclusively download these files for free as part of their membership. Gerber files allow a PCB to be produced on an appropriate device available locally, or through an online PCB manufacturing service.
Elektor recommends the Elektor PCB Service service from its business partner Eurocircuits or AISLER as the best services for its own prototypes and volume production.
The use of our Gerber files is provided under a modified Creative Commons license. Creative Commons offers authors, scientists, educators and other creatives the freedom to handle their copyright in a more free way without losing their ownership.
Components
The BOM (Bill of Materials) is the technically exhaustive listing of parts and other hardware items used to produce the working and tested prototype of any Elektor Labs project. The BOM file contains deeper information than the Component List published for the same project in Elektor Magazine. If required the BOM gets updated directly by our lab engineers. As a reader, you can download the list here.
Want to learn more about our BOM list? Read the BOM list article for extra information.
Component list
Resistors
R1 = 10kOhm
R2 = 33kOhm
R3–R9 = 330( (or 7-R DIL array)
Capacitors
C1 = 470µF 16V
C2 = 10µF 16V
C3 = 100nF
C4,C5 = 22pF
C6 = 100µF 10V
Semiconductors
D1 = 1N4004
LD1–LD6 = 7-segment display, Kingbright type SC56-11SRWA (red)
IC1 = 7805
IC2 = ATmega32P, programmed
T1,T3–T8 = BS170
T2 = BS250
Miscellaneous
X1 = 16MHz quartz crystal
S1,S2 = push button
K1,K3 = 2-way PCB terminal block
K2 = 3-pin pinheader
40-pin IC socket
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