ExpressCards on Santa Rosa MacBook Pro


My 15″ Santa Rosa (2.4 GHz) MacBook Pro is seriously limited with its two USB 2.0 ports. So I thought about:

Continue reading ExpressCards on Santa Rosa MacBook Pro

Burnt out USB charger


It’s one of those horrifically dangerous 2.5×2.5×2.5 cm mini-cube singe port 1 A USB chargers. There were scorch marks on the base of the case. The circuit was very simple, a simplified SMPS on two small PCBs… which held into the cube casing with white silicone/glue – scratch that away and it is easy to extract the pair of PCBs

Continue reading Burnt out USB charger

High power USB charging station


Whilst looking into the XTAR battery chargers, I came across the XTAR EU4, which offers QC3.0, 2 x USB 2.4A and USB C (PD) ports… although the QC and PD capability is a bit limited (i.e. QC has no 20V capability, and PD current is limited to 20V 2.25A (45W)), but not by much…

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Programming the Arduino Ethernet Board


Following on from The case of the broken Pro Micro, I wanted to use my Arduino Ethernet Board, which is basically an Uno and an Ethernet shield fused together on one board, as an AVR programmer for the Pro Micro. For a recounting of this tale see The case of the broken Pro Micro (reprise).

However, before I could use the Arduino Ethernet board as an ISP, I needed to figure out how to program the Arduino Ethernet board, as there is no USB port. Continue reading Programming the Arduino Ethernet Board

Charging a Samsung Tablet with an Apple iPad charger


A friend of mine had a totally discharged Samsung tablet, and had only the Samsung USB Connector (as she had left her usual charger at home):

Samsung USB Connector (30 pin)
Samsung USB Connector (30 pin)

She needed it to be charged and I thought that I would give it a go. Continue reading Charging a Samsung Tablet with an Apple iPad charger

2TB Hard disk for MacBook


Looking for an internal 2.5″ 2TB HDD for your MacBook, or MacBook Pro? The cheapest option is to get a Seagate Backup Slim (STDR200020x where x=0/1/2/3) USB external disk and rip its guts out. It is the only 9.5 mm high, 2.5″ 2TB internal disk on the market (or was in 2015), and I believe that it still is – even in late 2017.

In Bangkok, an internal disk such as a Seagate Barracuda ST2000DM006 2TB 64MB Cache SATA III 6.0Gb/s is around 3350 baht, or more precisely:

  • Seagate Barracuda SATA III 128 MB 7 mm 2Y 3390 Baht
  • Seagate Firecuda SATA III 128 MB 7 mm 5Y 3850 Baht

whereas the Seagate Backup Slim is normally 2620/2590 baht (depending on where you shop), or 2360 baht on offer (I actually ended up paying 2290 baht at a sale, with a soft case and a OTG mobile adapter thrown in).

Other disks are too fat (i.e. tall) at 12 mm, or 15 mm, to fit in the MacBook internal disk bay. other heights may be 6 mm, 7 mm (ST2000LM00x, where x=3/7).

The STGD2000400 is physically the same disk (9.6 mm thick), but it is pre-formatted for the PS4. There is also an XBox formatted disk (SRD0NF1/STEA2000403), although, as the external case is 14.8 mm thick, the disk itself may be oversized – note that the external case of the Backup Slim is 12.1 mm.

Also covered are the Seagate Backup Plus Fast, and Seagate Backup Plus.

Continue reading 2TB Hard disk for MacBook