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UltiProp Clock (2)

Part 2

UltiProp Clock (2)
The first installment didn’t tell you everything—far from it. Lots of readers intrigued by this project have been wondering about its principle and how it works. For example, what about the opposing magnetic fields around the transformer and motor?
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COMPONENT LIST
Resistors
SMD 0805, 5%
R1–R5,R23,R30 = 47kOhm
R6,R7,R16,R22,R26,R27,R31,R32,R36,R37 = 4.7kOhm
R8–R12,R24 = 22kOhm
R13,R14,R15,R17,R19,R21,R29 = 100Ohm
R25,R34 = 1.5kOhm
R28 = 330Ohm
R33,R35 = 10kOhm
R38 = 1MOhm
SMD 1206, 5%
R39 = 10Ohm
R40 = 0.1Ohm
Capacitors
Ceramic, SMD 0805, 20%
C1,C2,C5,C6,C12,C13,C20,C21,C24,C25,C27,C34 = 100nF 50V
C9,C16,C30 = 10nF 50V
C22,C23,C26,C28,C29,C35 = 1µF 10V
C37 = 1nF 50V
C38–C41 = 33pF 10V
Ceramic, SMD 1206, 20%
C3,C4,C7,C8,C10,C17 = 22µF 10V
C11,C18,C19,C43 = 1µF 50V
C14,C15 = 10µF 16V
C31,C32 = 100µF 16V, Vishay 593D
C33 = 47µF 25V, Vishay 593D
C36 = 0.1F 5.5V, Panasonic EECF5R5U104 (9692703)
Inductors
L1,L3 = 68µH 0.84A, Bourns SDR0604-680KL (1828011)
L2 = 220µH 0,38 A, Bourns SDR0604-221KL (1828016)
L4 = 1mH 0.12A, Bourns SDR0604-102KL (1828020)
L5 = 33µH 3A, Würth 744771133 (2082608)
Semiconductors
D1–D50 = LED, bicolor, PLCC4, choose your color, e.g. Vishay VLMKE3400-GS08 (1328370)
D51,D52,D53,D63,D66,D68,D69 = MBRS140T3G, ON Semiconductor (9557237)
D54–D62 = SFH421-Z, infrared LED, Osram (1226346)
D64 = BAT54
D65 = VSLY5850, infrared LED, Vishay (1870807)
D67 = LED, orange, PLCC2
D70, D71 = SMBJ48A (1899472)
Q1, Q2 = TEMT1020, phototransistor, Vishay (1470165)
Q3, Q4, Q7 = BC847B
Q5, Q6, Q8 = IRLML0060, transistor, International Rectifier (1783927)
U1 à U4 = MAX6957AAX, Maxim [Digikey # MAX6957AAX+T-ND]
U5, U8 = LM22674M-5.0 (1679666)
U6, U10 = Atmega328P-AU (1715486)
U7 = SFH2400FA-Z, photodiode, Osram (1226452)
U9 = LM2670SD-ADJ (1286849)
U12 = DS3231S, Maxim (1593292)
U13 = TSOP6238, 38kHz infrared receiver, Vishay (4913220)
U14, U15 = TC4427EOA, Microchip (9762647)
Miscellaneous
Y1,Y2 = 20MHz quartz crystal, TXC 7B-20.000MAAJ-T (1841988)
S1 = PEC11-4215F-S0024 rotary encoder, Bourns (1653380)
R41 = VT935G, photoresistor, Excelias Tech. (1652638)
J2, J3 = 6-pin pinheader (2x3), 0.1’’ pitch
J4 = 3-pin pinheader, 0.1’’ pitch
J5 = mini-jack socket, 2.1mm, Cliff DC10AS (1889309)
J6 = ventilator, 80mm, 2000-3000 rpm
TR1 = transformer with two concentric windings [1]
Enameled wire, 0.56mm diam. (23 AWG), approx. 25m (75 ft.)
Instant glue and double sided adhesive tape (see construction manual [1])
PCB nos. 120732-1 through -7
Numbers only in parentheses () are Farnell/Newark/element14 order codes
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