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


Building a Lithium battery charger


Searching for LiPo chargers, I came across this 1A Lithium Battery Charging Lipo charger embarks Module DIY Mini USB Port PK, for 99p, and I wondered how easy it would be to build a DIY LiPo charger. Continue reading Building a Lithium battery charger

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 USB external disk and rip its guts out. It is the only 9.5mm 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 recisely:

  • 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 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 to fit in the MacBook internal disk bay – other heights may be 6 mm or 15 mm.

Continue reading 2TB Hard disk for MacBook