Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
I’m slowly building up my equipment from scratch and I feel the need for an adjustable power supply.
Scanning ebay for a second hand one, as I am poor, I note that dual power supplies sell for more than the price of two single versions of the same item, just wondering why that is the case.
The...
The user instructions leave a lot to be desired, the instrument is portable and can be powered by four C size batteries, the batteries can be either disposable or rechargeable, and there is a selector switch on the rear.
The instrument may be powered by an approved AC adapter/charger.
If using...
OK so why didn't I think of that - doh.
There are four batteries in a carrier, they are used to retain the data in memory.
The power connector is of the barrel type but a little bit smaller in diameter than the most popular ones.
The multimeter shows the negative side of the battery is connected...
Oh crap now I'm in a quandry, the last thing I want to do is to connect it with reverse polarity.
I need someone who has one of these to test their supply plug with a multimeter and let us have a definitive answer.
Hey spec,
Haha, I like the Welsh nothing wrong with them at all, I was just clarifying that I'm not.;)
Prestatyn is on the coast, I live south east of Wrexham in the countryside, nice and quiet:D
prof328
Thanks again spec I've learnt a tiny morsel more on how to read diagrams.
I'm English but moved here with my job, been here 30 years and no plans to move, retired now and live in a little village.
Thanks for the advice spec, I have already downloaded the user instructions and service book in pdf format, but thanks for the offer most generous.
Being new to all this and at the lower end of the "steep" learning curve I found the diagram for JK1 confusing, as the V shaped connection I would...
Hi all, I have just bought a Thandar TD201 digital storage unit, but it came with no power supply.
I think it needs between 4V and 10V dc.
Before I buy a wall wart supply I would be grateful for some advice.
1) Does it matter if the supply is switching or regulated
2) Is it a standard plug...
It would have made a lot of sense to have the tolerance band twice as wide as the others, or the space between the tolerance and the others twice as wide, but hey the standards committee must know best and didn't think it was necessary.
On the ones I have the colours are evenly spaced, the bulge at each end has a colour band and then three in the middle all equi spaced making it quite confusing, all five are equally spaced, with no obvious one nearer an end.
Before computers and calculators we had to rely on log tables, then slide rules, and with a lot of practice you would be surprised at just how accurately you could guess the position of the curser in-between markings on logarithmic scales. I used to pride myself on getting accuracy to four...
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