MA-149 – Automotive DMM


A friend was given one. The screen was shot, but repaired using the old silver foil technique. However, the meter refused to give any readings.

It is difficult to find the User guide (in English). It seems to be a Spanish device… even though it is made in China.

Continue reading MA-149 – Automotive DMM



The UT-D07A is a BlueTooth adapter for the UT-71, UT-181 and UT-171 DMMs, and it costs around £20, if you shop around on eBay and AliExpress.

However, the UT-D07A is not much cop apparently… or rather the (iOS) software crashes regularly, there’s no Windows software to speak of, and basically, it’s probably not worth the cash… That said, it could be a useful addition, if you need to see graphical data. However, it is worth noting that as there is no Mac or Windows support, the ability to use that data, apart from obtaining pretty graphs from iPhone/iPad screenshots, may be rather limited

Continue reading UT-D07A

Feeling the need to clamp


After watching Balance Charging: Can you parallel charge?, I realised that I needed a clamp meter. But which one?

I had already purchased a UNI-T UT71D DMM, see Choosing which Multimeter to buy, and I was very happy with it, so the UNI-T clamp meter seemed a logical choice.  Everyone seems to have the UNI-T 210E. However, there are a myriad of other options.

Continue reading Feeling the need to clamp

Choosing which multimeter to buy


I was living in Bangkok, and had resurrected my past interest in electronics, most notably through using Arduinos.  After playing about for a few weeks I realised that I sorely needed a digital multimeter (DMM). I already own one, from my days at university, 27 years ago, a M-776 Precision Gold Autorange Digital Multimeter (with transistor tester and display hold) from Maplin. Cost me £20 at the time, which seemed like a lot of money back then (for a pound you could do the week’s shopping, have a night out on the town, entertain some ladies and still have enough money to get the bus home – not any more, eh?), although I seem to remember it being a top of the mid-range model, so it was worth it.

Maplin Precision GOLD M-776 DMM
Maplin Precision GOLD M-776 DMM

I have still got the box it came in!

The Box that the Maplin M-776 DMM came in
The Box that the Maplin M-776 DMM came in

Anyway, I digress… so the M-776 was no good to me back in the UK, when I’m in BKK, so I thought that I might as well splash out and get a new one, for two reasons:

  • It is always handy to have two, so that you can simultaneously measure current and voltage, and;
  • The newer models were bound to have better features than the M-776

Now, which one to buy?

Continue reading Choosing which multimeter to buy