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Three-way CH Boiler Valve Monitor

Three-way CH Boiler Valve Monitor
In the author’s homeland natural gas powered combination boilers are the standard source of central heating (CH) in private homes. These highly efficient apparatus not only provide heating via the radiators, but also take care of the hot water for the kitchen and the bathroom.
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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.

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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.
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Component list
R1,R2 = 1kOhm
R3,R5 = NTC 10kOhm
R4 = 1MOhm
P1 = 10kOhm trimpot, vertical
C1 = 4.7µF 25V radial
C2 = 10µF 25V radial
C3,C4 = 100nF
T1 = BC547B
IC1 = 78L05ACZ
IC2 = TLC271CP
BZ1 = actieve buzzer (i.e. internal oscillator), e.g. Kingstate KPEG-200A
K1 = adaptpr socket, PCB mount, e.g. DCJ0202
PCB # 130140-1

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