Please enter a valid full or partial manufacturer part number with a minimum of 3 letters or numbers

    SMT08 Search Results

    SF Impression Pixel

    SMT08 Price and Stock

    PUI Audio SMT-0827-S-HT-R

    BUZZER MAGNETIC 3.6V 8.5X8.5 SMD
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey SMT-0827-S-HT-R Reel 42,000 1,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 $0.54455
    • 10000 $0.54455
    Buy Now
    SMT-0827-S-HT-R Cut Tape 897 1
    • 1 $0.77
    • 10 $0.641
    • 100 $0.5446
    • 1000 $0.5446
    • 10000 $0.5446
    Buy Now

    PUI Audio SMT-0827-SW-3V-R

    BUZZER MAGNETIC 3.6V 8.5X8.5 SMD
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey SMT-0827-SW-3V-R Reel 6,000 600
    • 1 -
    • 10 -
    • 100 -
    • 1000 $2.12162
    • 10000 $2.12162
    Buy Now
    SMT-0827-SW-3V-R Cut Tape 604 1
    • 1 $3.66
    • 10 $3.027
    • 100 $2.4593
    • 1000 $2.28484
    • 10000 $2.28484
    Buy Now
    Master Electronics SMT-0827-SW-3V-R 685
    • 1 -
    • 10 -
    • 100 -
    • 1000 $2.06
    • 10000 $1.87
    Buy Now

    PUI Audio SMT-0826-S-R

    BUZZER MAGNETIC 3.6V 8X8MM SMD
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey SMT-0826-S-R Reel 5,000 1,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 $2.16645
    • 10000 $2.16645
    Buy Now
    SMT-0826-S-R Cut Tape 3,818 1
    • 1 $3.16
    • 10 $2.612
    • 100 $2.1226
    • 1000 $1.83118
    • 10000 $1.83118
    Buy Now
    Avnet Americas SMT-0826-S-R Reel 8 Weeks, 4 Days 1,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 $3.20388
    • 10000 $2.2201
    Buy Now
    Mouser Electronics SMT-0826-S-R 927
    • 1 $3.16
    • 10 $2.62
    • 100 $2.13
    • 1000 $1.99
    • 10000 $1.99
    Buy Now
    Onlinecomponents.com SMT-0826-S-R 1,498
    • 1 -
    • 10 -
    • 100 -
    • 1000 $1.99
    • 10000 $1.84
    Buy Now
    Master Electronics SMT-0826-S-R 1,498
    • 1 -
    • 10 -
    • 100 -
    • 1000 $1.99
    • 10000 $1.84
    Buy Now

    PUI Audio SMT-0840-T

    BUZZER MAGN 5V 8.5MMX8.5MM SMD
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey SMT-0840-T Reel 2,000 1,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 $0.8375
    • 10000 $0.8375
    Buy Now
    SMT-0840-T Cut Tape 1,735 1
    • 1 $1.13
    • 10 $0.937
    • 100 $0.8376
    • 1000 $0.8376
    • 10000 $0.8376
    Buy Now
    Mouser Electronics SMT-0840-T 763
    • 1 $1.13
    • 10 $0.937
    • 100 $0.838
    • 1000 $0.837
    • 10000 $0.837
    Buy Now

    PUI Audio SMT-0825-S-HT-R

    BUZZER MAGNETIC 3.6V 8.5X8.5 SMD
    Distributors Part Package Stock Lead Time Min Order Qty Price Buy
    DigiKey SMT-0825-S-HT-R Cut Tape 1,324 1
    • 1 $1.17
    • 10 $0.976
    • 100 $0.7987
    • 1000 $0.68716
    • 10000 $0.68716
    Buy Now
    SMT-0825-S-HT-R Reel 1,000 1,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 $0.64237
    • 10000 $0.62949
    Buy Now
    Avnet Americas SMT-0825-S-HT-R Reel 14 Weeks, 2 Days 1,000
    • 1 -
    • 10 -
    • 100 -
    • 1000 $0.99029
    • 10000 $0.6854
    Buy Now
    Mouser Electronics SMT-0825-S-HT-R 745
    • 1 $1.2
    • 10 $0.997
    • 100 $0.816
    • 1000 $0.683
    • 10000 $0.669
    Buy Now
    Onlinecomponents.com SMT-0825-S-HT-R
    • 1 -
    • 10 -
    • 100 -
    • 1000 $0.698
    • 10000 $0.612
    Buy Now
    Master Electronics SMT-0825-S-HT-R
    • 1 -
    • 10 -
    • 100 -
    • 1000 $0.698
    • 10000 $0.612
    Buy Now

    SMT08 Datasheets (35)

    Part ECAD Model Manufacturer Description Curated Type PDF
    SMT-0820-S-R Projects Unlimited Buzzers, Audio Products, BUZZER MAGNETIC 5V 8.5MM SMD Original PDF
    SMT-0821-S-R PUI Audio Buzzers, Audio Products, BUZZER MAGNETIC 3.6V 8.5MM SMD Original PDF
    SMT-0821-T-R Projects Unlimited Buzzers, Audio Products, BUZZER MAGNETIC 3.6V 8.5MM SMD Original PDF
    SMT-0823-S-R Projects Unlimited Buzzers, Audio Products, BUZZER MAGNETIC 5V 8.5MM SMD Original PDF
    SMT-0824-S-2-R PUI Audio BUZZER MAGNETIC 5V 8.5X8.5MM SMD Original PDF
    SMT-0824-SW-3V-R Projects Unlimited Buzzers, Audio Products, BUZZER MAGNETIC 3.6V 8.5MM SMD Original PDF
    SMT-0824-SW-5V-R Projects Unlimited Buzzers, Audio Products, BUZZER MAGNETIC 5V 8.5MM SMD Original PDF
    SMT-0824-TW-5V-R Projects Unlimited Buzzers, Audio Products, BUZZER MAGNETIC 5VDC 8.5MM SMD Original PDF
    SMT-0825-S-2-R Projects Unlimited Buzzers, Audio Products, BUZZER MAGNETIC 3.6V 8.5MM SMD Original PDF
    SMT-0825-S-4-R Projects Unlimited Buzzers, Audio Products, BUZZER MAGNETIC 3.6V 8.5MM SMD Original PDF
    SMT-0825-S-HT-R PUI Audio BUZZER MAGNETIC 3.6V 8.5X8.5 SMD Original PDF
    SMT-0825-S-HT-R PUI Audio BUZZER MAGNETIC 3.6V 8.5X8.5 SMD Original PDF
    SMT-0825-T-2-R Projects Unlimited Buzzers, Audio Products, BUZZER MAGNETIC 3.6V 8.5MM SMD Original PDF
    SMT-0825-T-HT-R PUI Audio BUZZER MAGNETIC 3.6V 8.5X8.5 SMD Original PDF
    SMT-0825-T-R Projects Unlimited Buzzers, Audio Products, BUZZER MAGNETIC 3.6V 8.5MM SMD Original PDF
    SMT-0826-S-R PUI Audio Buzzers, Audio Products, BUZZER MAGNETIC 3.6V 8.0MM SMD Original PDF
    SMT-0827-S-2-R Projects Unlimited Buzzers, Audio Products, BUZZER MAGNETIC 3.6V 8.5MM SMD Original PDF
    SMT-0827-S-3-R PUI Audio Buzzers, Audio Products, BUZZER MAGNETIC 3.6V 8.5MM SMD Original PDF
    SMT-0827-S-9-R PUI Audio Buzzers, Audio Products, BUZZER MAGNETIC 3.6V 8.0MM SMD Original PDF
    SMT-0827-S-HT-R PUI Audio BUZZER MAGNETIC 3.6V 8.5X8.5 SMD Original PDF

    SMT08 Datasheets Context Search

    Catalog Datasheet MFG & Type PDF Document Tags

    Untitled

    Abstract: No abstract text available
    Text: SPECIFICATIONS PARAMETERS RATED VOLTAGE SQUARE WAVE OPERATING VOLTAGE RANGE RATED CURRENT (MAX) COIL RESISTANCE MINIMUM SPL @ 10 CM RESONANT FREQUENCY OPERATING TEMPERATURE VALUES UNITS 5 4~6 Vp-p Vp-p 80 mA 30 ± 5 OHM 80 2,400 ± 200 dBA -40 ~ +85 -50 ~ +95


    Original
    PDF 2002/95/EC SMT-0824-SW-5V-R SMT-0824-SW-5V-R

    T0827S2R

    Abstract: SMT-0827-S-2-R T0827
    Text: SPECIFICATIONS PARAMETERS VALUES UNIT RATED VOLTAGE OPERATING VOLTAGE RANGE RATED CURRENT MAX 3.6 2.5 ~ 4.5 90 15 ± 3 87 2,700 ± 500 Vp-p Vp-p COIL RESISTANCE MINIMUM SPL @ 10 CM RESONANT FREQUENCY OPERATING TEMPERATURE STORAGE TEMPERATURE HOUSING MATERIAL


    Original
    PDF T0827S2R 2002/95/EC SMT-0827-S-2-R SMT-0827-S-2-R T0827S2R T0827

    T0825TR

    Abstract: No abstract text available
    Text: SPECIFICATIONS PARAMETERS VALUES UNIT RATED VOLTAGE OPERATING VOLTAGE RANGE RATED CURRENT MAX 3.6 2.5 ~ 4.5 90 15 ± 3 85 2,700 ± 500 Vp-p Vp-p COIL RESISTANCE MINIMUM SPL @ 10 CM RESONANT FREQUENCY OPERATING TEMPERATURE STORAGE TEMPERATURE HOUSING MATERIAL


    Original
    PDF 2002/95/EC SMT-0825-T-2-R SMT-0825-T-2-R T0825TR

    Voltech PM1000

    Abstract: Tektronix schematic tcp202 TDS754D Tektronix schematic tds754D 12 VAC MR16 LED Circuit Tektronix schematic Tektronix TCP202 TCP202 PM1000 CAT4201
    Text: DN06067/D Design Note – DN06067/D Three LED 300 mA MR16 Driver Device Application Input Voltage Output Power Topology I/O Isolation CAT4201 MR-16 LED Lamp 12 Vac 2.7 W Step-down No Other Specification Output Output Voltage Nominal Input Power Nominal Average Current


    Original
    PDF DN06067/D CAT4201 MR-16 CAT4201 Voltech PM1000 Tektronix schematic tcp202 TDS754D Tektronix schematic tds754D 12 VAC MR16 LED Circuit Tektronix schematic Tektronix TCP202 TCP202 PM1000

    M2032

    Abstract: AN3011
    Text: Deploying M/A-COM VCOs: Buffering, Mounting and Power Supplies 1 Introduction Voltage Controlled Oscillators VCOs are essential building blocks for signal generation where fast tuning is required. M/A-COM’s line of Aerospace and Defence VCOs deliver excellent tuning linearity and low phase


    Original
    PDF AN3011 M2032 AN3011

    murata CRT

    Abstract: GRM36COG101J50S panelink GRM36Y5V103Z50 Panasonic TX2 dvi schematic SMT0805 panasonic DSTN
    Text: PanelBus TFP201EVM User’s Guide September 2000 Mixed-Signal Products SLDU001 IMPORTANT NOTICE Texas Instruments and its subsidiaries TI reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information


    Original
    PDF TFP201EVM SLDU001 SMT0603 3GSYJ333 Dip16 TFP201 murata CRT GRM36COG101J50S panelink GRM36Y5V103Z50 Panasonic TX2 dvi schematic SMT0805 panasonic DSTN

    sharc ADSP-21xxx general block diagram

    Abstract: panasonic ECU diagram of gunn diode schematic diagram vga to rca S3C6430 adobe cs5 tutorials pcb 2.5mm female stereo pins 3.5mm Stereo jack pinout female ADSP-21xxx PHONEJACK STEREO SW
    Text: ADSP-21065L EZ-KIT Lite Evaluation System Manual Part Number: 82-000490-01 Revision 2.0 January 2003 Notice Analog Devices, Inc. reserves the right to make changes to or to discontinue any product or service identified in this publication without notice. Analog Devices assumes no liability for Analog Devices applications assistance, customer product design,


    Original
    PDF ADSP-21065L sharc ADSP-21xxx general block diagram panasonic ECU diagram of gunn diode schematic diagram vga to rca S3C6430 adobe cs5 tutorials pcb 2.5mm female stereo pins 3.5mm Stereo jack pinout female ADSP-21xxx PHONEJACK STEREO SW

    Untitled

    Abstract: No abstract text available
    Text: SOT-223-5 Voltage Regulator Evaluation Board User’s Guide 2008 Microchip Technology Inc. DS51751A Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet.


    Original
    PDF OT-223-5 DS51751A DS51751A-page

    pin configuration NPN transistor c828

    Abstract: w32 smd transistor aa26 fairchild smd transistor w32 speedtech p65 GMT795 foxconn npn transistor w16 SMI TSOP 48pin c427 diode
    Text: 5 4 3 2 1 First International Computer,Inc Protable Computer Group HW Department D D Board name : Mother Board Schematic 1. Schematic Page Description : Project : AT11 2. PCI & IRQ & DMA Description : Version : 0.2 3. Block Diagram : 4. Nat name Description :


    Original
    PDF 875ule. 1000pF 200mils BCM5705M NO266 pin configuration NPN transistor c828 w32 smd transistor aa26 fairchild smd transistor w32 speedtech p65 GMT795 foxconn npn transistor w16 SMI TSOP 48pin c427 diode

    8a320

    Abstract: TEESVB TEESVB21A VT1631 RM06FTN TEESVA1A 2R5TPE330M9 sanyo TEESVB21 CB1410QF smd transistor A7p
    Text: 5 3 2 1 First International Computer,Inc Portable Computer Group HW Department D C 4 Board name : Mother Board Schematic 1. Schematic Page Description : Project : LM7WV 2. PCI & IRQ & DMA Description : Version : 0.2 3. Block Diagram : D C 4. Net name Description :


    Original
    PDF VN800 VT8237R 8a320 TEESVB TEESVB21A VT1631 RM06FTN TEESVA1A 2R5TPE330M9 sanyo TEESVB21 CB1410QF smd transistor A7p

    kb3886

    Abstract: NPN transistor c828 smd diode S6 58a 218S4EASA32HK SB400 LM13W SOT-26 F14 w27 smd transistor diode C940 ST ak7 SMD Transistor KB3886 B1
    Text: 5 3 2 1 First International Computer,Inc Portable Computer Group HW Department D C 4 Board name : Mother Board Schematic 1. Schematic Page Description : Project : LM13 2. PCI & IRQ & DMA Description : Version : 0.3 3. Block Diagram : D C 4. Net name Description :


    Original
    PDF RC400MB SB400) TC004-PS11AT-C FMK11 FMK13 FMK14 kb3886 NPN transistor c828 smd diode S6 58a 218S4EASA32HK SB400 LM13W SOT-26 F14 w27 smd transistor diode C940 ST ak7 SMD Transistor KB3886 B1

    MAX8774

    Abstract: 88E1116 fic motherboard 42HG NF-430-N-A3 Maxim MAX8774 transistor c117 XTB70 NF-SPP-100-N-A2 ss14 dc
    Text: 5 4 3 2 1 First International Computer,Inc D D Portable Computer Group HW Department Board name : MotherBoard Schematic C Project : AMD S1 + Nvidia C51D + MCP51 Version : 0.3 C Initial Date : 05/13/2006 Confidential B B Manager Sign by : Avery Lee Drawing by


    Original
    PDF MCP51 PA1538/XA1526 PTB50/XTB70 033uF G9338 MAX8774 88E1116 fic motherboard 42HG NF-430-N-A3 Maxim MAX8774 transistor c117 XTB70 NF-SPP-100-N-A2 ss14 dc

    ptt50

    Abstract: HT-191NB5 MCP67MD MCP67 MCP67D orion tv lcd Schematic Power Supply MCP67MV top mark smd A12 5PIN G784 FIC PTT50
    Text: 5 4 3 2 1 First International Computer,Inc D D Portable Computer Group HW Department Board name : MotherBoard Schematic C Project : AMD S1 + MCP67MD + NB8M-SE Version : 0.1 C Initial Date : 10/25/2006 Confidential B B Manager Sign by : Avery Lee Drawing by


    Original
    PDF MCP67MD PTT50 SMT0402 ptt50 HT-191NB5 MCP67MD MCP67 MCP67D orion tv lcd Schematic Power Supply MCP67MV top mark smd A12 5PIN G784 FIC PTT50

    NF-SPP-100-N-A2

    Abstract: 88E1116 NF-430-N-A3 88E1116 RGMII config SC413TSTRT Maxim MAX8774 APM2307AC-TRL MCP51 HY5PS561621AFP-25 M38827
    Text: 5 4 3 2 1 First International Computer,Inc D D Portable Computer Group HW Department Board name : MotherBoard Schematic C Project : AMD S1 + Nvidia C51D + MCP51 Version : 0.5 C Initial Date : 05/13/2006 Confidential B B Manager Sign by : Avery Lee Drawing by


    Original
    PDF MCP51 PA1538/XA1526 PTB50/XTB70 033uF G9338 NF-SPP-100-N-A2 88E1116 NF-430-N-A3 88E1116 RGMII config SC413TSTRT Maxim MAX8774 APM2307AC-TRL MCP51 HY5PS561621AFP-25 M38827

    G990P11U

    Abstract: FW3227 h48 diode zener transistor u6h ZENER h48 Zener diode H48 diode Aa42 smd transistor L44 TRANSISTOR C2328 F8250
    Text: 5 4 3 2 1 First International Computer,Inc Portable Computer Group HW Department D Board name : MotherBoard Schematic 1. Schematic Page Description : Project : MY031 2. PCI & IRQ & DMA Description : Version : 0.5 3. Block Diagram : C Initial Date : Aug. 07 , 2008


    Original
    PDF MY031 MY031 DTSGF-61N-V-T/R G990P11U FW3227 h48 diode zener transistor u6h ZENER h48 Zener diode H48 diode Aa42 smd transistor L44 TRANSISTOR C2328 F8250

    SK 18751

    Abstract: RR0510S-80R6-FN ALC269 FIC CW0A0 TRANSISTOR SMD K27 smd transistor g28 w32 smd transistor w27 smd transistor 1TJE125DP1A000B aPM4906
    Text: 5 4 3 2 1 First International Computer,Inc Portable Computer Group HW Department D Board name : Mother Board Schematic D 1. Schematic Page Description : Project : CW0A0/CW0A1 Diamondville+945GMS+ICH7M Version : 0.1 2. PCI & IRQ & DMA Description : 3. Block Diagram :


    Original
    PDF 945GMS NTC017-BA1G-A160T SK 18751 RR0510S-80R6-FN ALC269 FIC CW0A0 TRANSISTOR SMD K27 smd transistor g28 w32 smd transistor w27 smd transistor 1TJE125DP1A000B aPM4906

    ZENER D30

    Abstract: aa26 fairchild ag20 taiyo R170 diode DIODE SMD C136 w32 smd transistor foxconn fic at11 st c632 Zener diode transistor C458
    Text: 5 4 3 2 1 First International Computer,Inc Protable Computer Group HW Department D D Board name : Mother Board Schematic 1. Schematic Page Description : Project : AT11 2. PCI & IRQ & DMA Description : Version : 0.2 3. Block Diagram : 4. Nat name Description :


    Original
    PDF 875C38 1/16W 1000pF 200mils BCM5705M NO266 ZENER D30 aa26 fairchild ag20 taiyo R170 diode DIODE SMD C136 w32 smd transistor foxconn fic at11 st c632 Zener diode transistor C458

    HP7004A

    Abstract: 1417K4A SLLU007A TLK2500 HP83480 BERT 240-1018-1-ND lucent laser 2.5 Gbps
    Text: TLK2500 Serdes EVM Kit Setup and Usage User’s Guide March 2000 Mixed Signal Products SLLU007A IMPORTANT NOTICE Texas Instruments and its subsidiaries TI reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information


    Original
    PDF TLK2500 SLLU007A 1417K4A HP7004A SLLU007A HP83480 BERT 240-1018-1-ND lucent laser 2.5 Gbps

    Untitled

    Abstract: No abstract text available
    Text: SPECIFICATIONS PARAMETERS RATED VOLTAGE SQUARE WAVE OPERATING VOLTAGE RANGE RATED CURRENT (MAX) COIL RESISTANCE MINIMUM SPL @ 10 CM RESONANT FREQUENCY OPERATING TEMPERATURE STORAGE TEMPERATURE HOUSING MATERIAL TERMINAL MATERIAL WEIGHT VALUES UNITS 3.6 2.5 ~ 4.5


    Original
    PDF 2002/95/EC SMT-0824-SW-3V-R SMT-0824-SW-3V-R

    J-STD-005

    Abstract: 1092-03A-5 62NCLR-A 292-06A-5 1092-04A-5 hakko AVX0402YG104ZAT2A SMA end launch for pcb 142-0761-841-A SN62 PB36 ag2 heat conductivity
    Text: AMMP-XXXX Production Assembly Process Application Note 5386 Description Package Features This document describes and illustrates the attachment and detachment of Avago’s 5x5mm packaged products in a PCB soft board environment. The AMMP package has a solid copper filled cavity to allow optimum thermal transfer of the packaged device to the PCB and associated heat


    Original
    PDF 42-0761-891-A DC-40GHz 092-04A-5 092-03A-5 DC-50GHz 492-03A-5 493-03A-5 AVX0402YG104ZAT2A SMT-0805 08052F47SZ6BBOD J-STD-005 1092-03A-5 62NCLR-A 292-06A-5 1092-04A-5 hakko AVX0402YG104ZAT2A SMA end launch for pcb 142-0761-841-A SN62 PB36 ag2 heat conductivity

    delay line kappa

    Abstract: 1290Q SMT08CA101 SMT08CA250 SMT08CA251 SMT08CA500 SMT08CA501 SMT08CA750 VP34
    Text: SERIES SMT08 TTL SCHOTTKY 8-P IN 5-TAP SURFACE MOUNTED DELAY LINE RECOMMENDED OPERATING CO NDITIO NS Vc c V|h V|l l|K Iq h In i S u p p ly V o lta g e H igh-Level In p u t V o lta g e Low -Level In p u t V o lta g e In p u t C la m p C urre n t H igh-Level O u tp u t C urre n t


    OCR Scan
    PDF SMT08 SMT08CAXXX SMT08CA750 SMT08CA101 SMT08CA251 SMT08CA501 delay line kappa 1290Q SMT08CA250 SMT08CA251 SMT08CA500 VP34

    RC5036M

    Abstract: intel pentium 3 motherboard schematic diagram
    Text: P A I R C H I I - D s e m ic o n d u c t o r w w w .fa ir c h ild s e m i.c o m tm RC5036 Dual Adjustable Voltage Regulators w/Enable Features Description • Combines switching regulator and low dropout linear regulator in single chip • Pentium P54C/P55C CPU selectable - no jumpers


    OCR Scan
    PDF RC5036 RC5036 RC5036M intel pentium 3 motherboard schematic diagram

    IRL3103

    Abstract: No abstract text available
    Text: FA IR C H IL D www.fairchildsemi.com Ml C O N D U C T O R RC5031 Adjustable Switching Regulator Description • High power switched-mode DC-DC controller can source in excess of 13 A • Output voltage adjustable from 1.5V to 3.6V • 85% efficiency • Cumulative accuracy <3% over line, load, temperature


    OCR Scan
    PDF RC5031 RC5031 IRL3103

    PC xt MOTHERBOARD CIRCUIT diagram

    Abstract: zener diode 1N5817 f g megamos
    Text: P A IR C H II-D s e m ic o n d u c t o r w w w .fa irc h ild s e m i.c o m tm RC5041 P r o g r a m m a b l e DC-DC C o n v e r t e r f or P e n t i u m P55C, K6 , and 6 x 8 6 M X ™ M 2 P r o c e s s o r s • Programmable output from 2.1V to 3.5V using integrated


    OCR Scan
    PDF RC5041 200KHz DS30005041 PC xt MOTHERBOARD CIRCUIT diagram zener diode 1N5817 f g megamos