- on Home & Garden
- Published in issue 10/2010 on page 36
CL-3 Digital Rotary Combination Lock
From black box to open-source project
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 its business partner Eurocircuits as the company of choice for its own prototypes and volume production in selected cases.
6 digit operation (three 2-digit numbers in CW-CCW-CW sequence)
Optical or mechanical rotary encoder
Hidden/secure programming button
Free C code
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.
R1,R2,R3,R5,R6,R8,R9 = 100?
R4,R7 = 10k?
C1,C2 = 10nF
C3,C5,C7 = 100nF
C4,C6 = 100?F 25V radial
D1 = 1N4148
D2 = 1N4001
LD1,LD2 = 7-segment LED display, common anode (CA), h=10mm, Avago type HDSP-315L
T1 = BC557
IC1 = Atmel ATTINY2313-20PU, programmed, Elektor # 100026-41
IC2 = 7805
S1 = Tactile switch, 6mm, Multicomp type MC32830
S2 = rotary encoder, Alps type EC11E15204aE
K1 = 2-pin pinheader, 0.1 inch lead pitch.
K2,K6 = 10-pin (2x5) pinheader 0.1 inch lead pitch
K3,K4,K5,K7 = 3-pin pinheader, 0.1 inch lead pitch
RE1 = PCB mount relay, DPCO, 5VDC, Multicomp type HRS2H-SDC5V