Parameter box for MIDI software
convenient software synthesizer operation

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Materials
Component list
R1,R8 = 1k?5
R2 = 1k?
R3 = 10?
R4,R7,R9-R16 = 10k?
R5,R6 = 220?
P1-P8 = 47k? linear potentiometer
P9 = 470? preset Hi
Capacitors:
C1-C8,C10,C11,C12,C14,C18 = 100nF
C9,C13,C17,C19 = 10µF 63V radial
C15,C16 = 33pF
Semiconductors:
D1,D2 = LED, high efficiency
D3 = 1N4001
T1 = BC547B
IC1 = MAX186BEPP
IC2 = PIC16F84-10/P (programmed, order code 996521-1)
IC3 = 7805
Miscellaneous:
K1 = 4-way SIL connector
K2 = 2 PCB solder pins
K3,K6 = 10-way SIL connector
K4,K9 = 5-way SIL connector
K5,K10 = 6-way SIL connector
K7 = 15-way Sub-D plug, chassis mount (see text)
K8 = 5-way DIN socket, chassis mount, 180° (see text)
K11 = mains adaptor socket
S1-S8 = pushbutton, 1 make contact
S9-S12 = on/off switch
X1 = 10MHz quartz crystal
Enclosure, e.g. Teko 363 (216x130x77mm)
PCB, order code 990087-1
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