Home (Tolia) PC

Barcode scanner

USB

Flash

Hard drive

HDD recover

Choosing best HDD for value

Models in 2017:

Name / model Price Capacity (TB) Spindle rotation (RPM) Reading / writing speed (MB/s) Internal speed (MB/s) Internal cache (MB) Power consumption read/write/idle (W) Price per GB Warranty (years)
Seagate Barracuda Compute / ST4000DM004 €103 4 5400 190/190 ? 256 3.7/3.7/2.5 €0.025 2
WD Blue / WD40EZRZ €105 4 5400 150/150 ? 64 5.3/5.3/3.4 €0.025 2
HGST Internal Drive Kit NAS WW / HDN726040ALE614, H3IKNAS400012872SWW €122 4 7200 205/192 600 128 7.3/7.3/6.9 €0.031 3
WD Red / WD40EFRX €128 4 5400 150/150 ? 64 4.5/4.5/3.3 €0.031 3

SATA

eSATApd pinout

  • SATA interface does not have any wires to transmit power, hence eSATA-to-SATA cable does supply power. eSATAp is eSATA+USB combined cable and supplies +5V provided by USB. eSATApd ("power dual") additionally provides +12V power by means of side power pads.
  • Port multiplier – multiple SATA devices to be connected to a single SATA host port, however community reports that it is challenging to set it up reliably.

SATA-to-IDE adapter

Slim IDE 40 pin IDC CD/DVD Drive -to- PC 40 pin IDE adapter – $4.79 Bidirectional IDE SATA adapter – $7.90

SSD

mSATA

Kingston UV500 mSATA 480GB Samsung 860 EVO mSATA 500GB

Item Price Volume (GB) Read speed (GB/s) Write speed Technology Power consumption (W, max) Price per GB
Kingston UV500 mSATA 480GB €73.04 480 520 500 3D V-NAND (TLC) 2.32 €0.148
Samsung 860 EVO mSATA 500GB €83.48 500 550 520 3D V-NAND (TLC) 2.5 €0.167

M.2 socket

M.2 SATA vs NVMe

Different types of M.2 SSD sockets 80mm, 60mm and 42mm SSD sizes Mini PCI-e -to- M.2 NGFF 30mm/42mm adapter card for M.2 SSD – $2.05 (€1.94)

High-reliability solutions

NAS

Error recovery control

SCT ERC (SMART Command Transport Error Recovery Control) should be enabled in RAID configurations (Western Digital have 7 seconds setting):

smartctl -l scterc,70,70 /dev/sdX

See also:

Intel Smart Response Technology

Drives

Toshiba MK2552GSX 250GB

fdisk -l /dev/sda

hdparm -t /dev/sda

smartctl -a /dev/sda

Toshiba MK5065GSX 500GB

fdisk -l /dev/sda

hdparm -t /dev/sda

smartctl -a /dev/sda

Toshiba MK1234GSX 120GB

fdisk -l /dev/sdb

hdparm -t /dev/sdb

smartctl -d sat -a /dev/sdb

wd_2520my_2520book_2520mirror_2520edition.jpg

Western Digital WDC WD10EAVS-00D7B0, 2TB

fdisk -l /dev/sdc

hdparm -t /dev/sdc

smartctl -d sat -a /dev/sdc

Seagate WD10EAVS-00D7B0:0, 4TB

hdparm -t /dev/sde

smartctl -d sat -a /dev/sde

Seagate WD10EAVS-00D7B0:1, 4TB

hdparm -t /dev/sdf

smartctl -d sat -a /dev/sdf

SanDisk Ultra Fit flash, USB2, 64GB

fdisk -l /dev/sdc

hdparm -t /dev/sdc

SanDisk Ultra Fit flash, USB2, 64GB

fdisk -l /dev/sdd

hdparm -t /dev/sdd

Power

Power supply

Linear voltage regulator:

    • The dropout voltage is the differential voltage between the input and the output for which the regulator output no longer maintains regulation against further reductions in input voltage. LDO is low dropout voltage regulator.
    • Quiescent current (Iq), also called ground current, is the current used to operate the LDO, and is not delivered to the load.
  • RT9013-33: Vin 2.2-5.5V, Vdrop 160-400mV (depends on Vin), Iq 25µA, Iout 0.5A.
  • MCP1825S: Vin 2.1-6V, Vdrop 210-350mV, Iq 120-220µA, Iout 0.5A.

TP4056 + protection 5V 1A micro USB Li-ion battery charging board – €1.39 ($1.66) TP4056 + MT3608 – €1.33 ($1.57) TP5000 – €0.60+€0.88 ($0.71+$1.05) TP5100 – €0.40+€0.93 ($0.48+$1.11)

Synchronous converter:

WeMos D1 имеет на борту LDO стабилизатор с собственным током потребления 5-10 мкА и минимальным падением вход/выход 250-300 мВ. Девайсы сделанные на основе этой платки, идеально будут работать с батарейным питанием и в спящем режиме. Но эту платку нельзя питать напряжением более 6В, в отличие от NodeMCU на Vin, которой можно подавать и более (но больше 7-8В тоже не рекомендую, иначе вся лишняя мощность (U-3.3)*0.1 будет выделяться на AMS1117 стабилизаторе в виде тепла). LM1117 и AMS1117 функциональные аналоги, и их параметры принципиально ничем не отличаются.

Power consumption

USB

USB 3.0 AT34 tester with color LCD – $6.65

Specifications

FNIRSI FNB58 USB Tester – $49.59 (€46.20)

Specifications

Voltmeter

Multimeter

Universal tester

AVR multitester – $13.86 (€12.00)

Specifications

Name Power supply Consumption (max/avg)
CrossOver monitor 24V, 5A 79W / 77W
Belkin router 12V, 1A 3.7W
Zyxel router 12V, 2A 7.5W
Netgear router 12V, 2.5A :HELP:
Western Digital HDD 12V, 3A 22W / 14W
AOpen miniPC 19V, 3.42A 33W / 25W
Shuttle miniPC 19V, 4.75A :HELP:
Fantec HDD bay 12V, 5A :HELP:
Table lamp in office ?V, ?A 4.6W
Foscam IP camera 5V, 2A 3.8W
Dune HD ?V, ?A IPTV: 9.2W / 6.1W, MPEG4: 8.5W

Wires and connectors

DIY

Tools and accessories:

Removing components:

Cashback:

Drill:

High current batteries:

30A batteries (:WARN: Murata/Sony are expensive and overrated):

Welder:

DH20 Pro/DH30 mini spot welding machine – €55.08 ($60.82)

7-16V Lithium Battery Welding Board – €15.21 ($15.77)

  • According to different configurations, the welding thickness can be about 0.1mm-0.15mm. By replacing the thicker wire (10 mm²), it can barely weld 0.2mm thick plate.
  • Sort press the key to switch modes, each mode corresponds to 7 different welding times, indicated by LED: red (shortest welding time) / green / blue / white / yellow / pink / purple (longest welding time)
  • Long press sets the waiting time. The default is 3 seconds and the maximum is 10 seconds.
  • Power supply voltage: 12V-16.8V
  • Current requirements: 150A or more instantaneous output (for example car startup power, 3S aeromodel high rate battery pack, 20A or higher and 12V lead-acid battery with good performance)

Saw:

Glue:

Microscope:

Oscilloscopes

Logic analysers

PCB

From NiMH to LiIon

Использует штатную зарядку NiCd зарядку:

Переделка блока питания / зарядки за базе готовой зарядки для LiIon:

Переделка блока питания / зарядки на базе DC-DC преобразователя с подстройкой:

BMS:

610606910_1_1000x700_kontroler-bms-3s-4s-25-30a-zaryada-razryada-zaschity-balansir-dlya-li-ion-vinnitsa_rev003.jpg

Solar panels

Dependence of battery lifetime from Depth of Discharge (DoD) and charge rate

BMS:

MPTT:

Controllers:

Batteries:

How to Connect the LiFePO4 battery in parallel?

Panels:

Calculators:

  • Solar irradiance is a measure of how much solar power you are getting at your location
  • NREL's PVWatts Calculator – estimates the energy production and cost of energy of grid-connected photovoltaic (PV) energy systems throughout the world.

Theory:

How bypass diode in solar panel works

LEGO

Детские конструкторы для взрослых

Hardware problems

hardware/start.txt · Last modified: 2023/01/02 11:37 by dmitry
 
 
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