Metronome/Diapason
based on a PIC16F84 microcontroller
Materials
Gerber file
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Component list
R1 = 1 kOhm
R2 = 470Ohm
R3 = 47kOhm
R4 = 10Ohm
R5-R12 = 20kOhm 1%
R13-R20 = 10kOhm 1%
P1 = 10kOhm preset
P2 = 10kOhm logarithmic potentiometer
Capacitors:
C1 = 100nF
C2,C3 = 22pF
C4 = 47nF
C5 = 4nF7
C6 = 100µ F 16V radial
C7,C8 = 10nF
C9 = 470µ F 16V radial
Semiconductors:
D1-D6 = 1N4148
D7 = LED, red, high efficiency
IC1 = PIC16F84-04/P, programmed, order no. 000198-41
IC2 = 74HC574
IC3 = LM386
IC4 = 7805
Miscellaneous:
S1-S6 = pushbutton, Multimec CTL4 with cap D6K0
K2 = headphones socket, stereo, PCB mount, for 6.3mm dia. jack plug
LCD with 2 lines of 16 characters, e.g., PCF1602
Battery clip for PP3 (9V) battery
Enclosure: Retex, dim. Approx. 145 x 90 x 45mm (Conrad Electronics # 54 15 59)
PCB, order code 000189-1
Disk, all project software, order code 000198-11
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