Qty Reference Value Manufacturer Part Number Price
5 C1-C5 See capacitor notes below. 10F 2.7V .075 ohm ESR, 5mm lead spacing Maxwell Technologies Inc BCAP0010 P270 T01 2.71 13.55
1 C6 10uF 25V X7R 5 mm lead spacing TDK FK26X7R1E106K 0.63 0.63
3 C7-C9 22uF 10V X7R 5 mm lead spacing TDK FK20X7R1A226M 0.63 1.89
8 C10-C18 .1uF X7R Vishay K104K15X7RF53L2 0.10 0.80
2 D1,D3 1N5820 20V, 3A, .5V, Typ .25V at .5A Fairchild Semiconductor 1N5820 0.49 0.98
1 D2 Red LED T-1 3/4 Kingbright WP7113LSRD 0.17 0.17
1 F1 3A fuse Littelfuse 0251003.MXL 0.71 0.71
REF J1 20 pin edge connector



REF J2 34 pin edge connector



3 J3,J6,J7 20 pin .1” dual row .23” mating length, .095” tail length .030uin GXT plating FCI 67996-220HLF 0.70 2.10
Alt Recommended for J7 Shrouded version of above 3M D2520-6002-AR 1.89
1 J4 34 pin .1” dual row .23” mating length, .095” tail length .030uin GXT plating FCI 67996-134HLF 1.43 1.43
Alt
10uin gold Sullins PBC17DAAN 2.55
Alt
Shrouded version of above 3M D2534-6002-AR 1.80
1 J5 Right angle drive power connector Molex 15-24-4441 1.24 1.24
2 J8,J9 46 pin .1” dual row .23” mating length, .095” tail length. 50 Pin purchased since common and extra gives P1 and P4. Some distributors sell 46 pin. .030uin GXT plating FCI 67996-150HLF 1.53 3.06
Alt
10uin gold Sullins PBC25DAAN 3.41
1 P1 2 pin .1” .23” mating length, .095” tail length Leftover from J8,J9

0.00
REF P2,P3, P5, P6 Holes for power/ground pickup if needed



1 P4 4 pin .1” dual row .23” mating length, .095” tail length Leftover from J8,J9

0.00
12 R1,R2,R3,R5-R7,R15,R17,R18,R20-R22 5.11k 1% 1/4 watt resistor. R15 only needs to be 1% Yageo MFR-25FBF52-5K11 0.10 1.20
Alt

KOA Speer MF1/4DC5111F 0.06
6 R8-R12, R14 1k 1% 1/4 watt resistor. Don't need to be 1% Yageo MFR-25FBF52-1K 0.10 0.60
Alt

KOA Speer MF1/4DC1001F 0.06
1 R13 10 ohm 3W resistor. 14W peak power. Limits charging current to 1.2A, Vishay RWM041010R0JR15E1 0.63 0.63
1 R16 732 ohm 1% resistor Yageo MFR-25FBF52-732R 0.10 0.10
Alt

KOA Speer MF1/4DC7320F 0.06



KOA Speer MF1/4DCT52R7320F 0.06
1 R19 267 ohm 1% resistor Yageo MFR-25FBF52-267R 0.10 0.10
Alt

KOA Speer MF1/4DC2670F 0.06
2 R4,R23 100 ohm 1% resistor. 5% should be ok Yageo MFR-25FBF52-100R 0.10 0.20
3 RN1-RN3 8 pin SIP 220/330 ohm terminator. 220 to pin 8 Bourns 4608X-104-221/331LF 0.38 1.14
1 U1 BEAGLEBONE BLACK CircuitCo BB-BBLK-000
55.00
3 U2,U3,U5 74LVC245 3.3 to 5V translator 20 pin DIP Texas Instruments SN74LVC245AN 0.60 1.80
2 U4,U13 MAX3076EEPD+ 3.3V RS422 transceiver Maxim MAX3076EEPD+ 4.64 9.28
Alt

Maxim MAX3076EEPD, MAX3076EAPD+, MAX3076EAPD

5 U6-U10 TL431LP 2.5V regulator Fairchild Semiconductor KA431AZTA 0.38 1.90
1 U11 I2C 256kb EEPROM ON Semiconductor CAT24C256LI-G 1.20 1.20
1 U12 12V 1.5A DC/DC Murata OKR-T/1.5-W12-C 3.97 3.97
Alt
Not recommended for first rev board Artesyn LDO03C-005W05-HJ 8.24
3 U14-U16 74ACT05 14 pin DIP Texas Instruments CD74ACT05E 0.67 2.01
1 For P1 .1 Jumper 3M 969102-0000-DA 0.10 0.10




Total price excluding pcb 105.79




Power holdup price in total 24.53




Beaglebone price in total 55.00







Capacitor notes:




For C1-C5 there is a trade off between how well the capacitors fit and run time. . 3F is not sufficient if any significant amount of data waiting write-back to flash. 10F is plenty but won't fit standing up in half hight drive bay. 5F should be OK but capacity loss with aging may be a concern.







These are other possible 10F options
5 C1-C5 Better ESR and tolerance Cooper Bussman HV1030-2R7106-R 3.23 16.15
5 C1-C5 Better ESR and tolerance, Better life at high temperatures NessCap Co Ltd ESHSR-0010C0-002R7 3.87 19.35







These are possible 5F options
5 C1-C5
Cooper Bussman HV1020-2R7505-R 2.72 13.60
5 C1-C5 Better life at high temperatures NessCap Co Ltd ESHSR-0005C0-002R7 2.83 14.15







This is the original 3F option
5 C1-C5 3F 2.7V .080 ESR, 2.5mm lead spacing Cooper Bussman HV0820-2R7305-R 2.54 12.70