Universal Thermostat
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.
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Component list
R1,R2,R3,R5 = 4kO7
R4 = 2kO2
R6 = 10k
R7 = 33
P1 = 10kO preset
Capacitor
C3 = 100nF
Semiconductors
D1,D2 = 1N4001
T1 = BC547
IC1 = 7805
IC2 = PIC16F628-04/P (programmed, with software # 080090-11)
Miscellaneous
X1 = 4MHz ceramic resonator
S1...S3 = miniature push button
K1,K2 = 2-way pinheader
K3,K5 = 3-way pinheader
K4 = 16-way pinheader
DS1820 and 3-way ribbon cable
LCD with 2x16 characters
PCB #080090-1 from www.thepcbshop.com
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