» Topics » DIY ideas »Self-loading multimeter (my scheme)

Self-loading multimeter (my scheme)

Topics / DIY ideas
Added 7 comments


It often happens that the battery in the multimeter is discharged. Here it would be necessary to put the battery in and periodically pull it out and charge ... Charging through the USB port is also not convenient and not interesting.
I propose a multimeter charging circuit using the instrument’s own probes.



It’s not bad to place everything in one case (a power supply with 22o, charging), a power supply and a button in the multimeter. And in order to charge the calculator, you just need to press the “charge” button and connect the probes to the 220 V socket ...
The fuse here protects against accidental "not pressing a button" ... although here everything can be done automatically (with a protection relay) ...
More intuitive diagram:

Question \ topic is automatically published in the social. site network - stay tuned for answers there:
6
Added 7 comments

Suitable for topic

Related topics

Add a comment

    • smilesmilesxaxaokdontknowyahoonea
      bossscratchfoolyesyes-yesaggressivesecret
      sorrydancedance2dance3pardonhelpdrinks
      stopfriendsgoodgoodgoodwhistleswoontongue
      smokeclappingcraydeclarederisivedon-t_mentiondownload
      heatirefullaugh1mdameetingmoskingnegative
      not_ipopcornpunishreadscarescaressearch
      tauntthank_youthisto_clueumnikacuteagree
      badbeeeblack_eyeblum3blushboastboredom
      censoredpleasantrysecret2threatenvictoryyusun_bespectacled
      shokrespektlolprevedwelcomekrutoyya_za
      ya_dobryihelperne_huliganne_othodifludbanclose
7 comments
Author 0
Reply To quote A complaint
yes, there is such a problem, it is problematic to arrange a good contact in the socket with ordinary probes ... here you need special probes ... which go from a larger diameter to a smaller one similar to those in the Ts4315 device ... Later I’ll do this homemade work ... but for now I’m thinking about details ...
0
Reply To quote A complaint
Quote: New Standard
jacks with a plug and cord will not be smaller and cheaper than a switch ... and why a plug when there are probes ...

Are you pretending or really do not understand what is written?
Comparing the price with the switch, you need not jacks with a plug and cord, but only jacks: you are going to use the probes to be included in the network. 2 sockets are cheaper than a normal switch. I emphasize normal: You are going to pass through it both measuring circuits and, relatively speaking, power ones. Since the simplest nests of the RD-1 type, due to the design of the "correct" probes, are not suitable here, the cheapest option will be self-made from spring bronze, but you can also search the Chinese.
By the way, with conventional probes it is difficult to ensure reliable contact in the outlet. And about the fact that the cartoon also has a 230 V low voltage converter + stuffing the battery charging circuit, I don’t say at all, the task is to place all this "wealth" in a small amount of free space.
+2
Reply To quote A complaint
Where is the finished device? And the fact that most of the used multimeters work from the "crown"? In my opinion, a useless thing. He took out the battery, put it in charge, charged it, put it back in place.
Author 0
Reply To quote A complaint
jacks with a plug and cord will not be smaller and cheaper than a switch ... and why a plug when there are probes ... Okay, if they weren’t there ... At the expense of random supply ... when "accidentally" measure the current in the outlet - also dangerous ...
Because of this, no one convinces that the voltmeter and ammeter should be separate ... they just use the multimeter carefully ... or install protection systems against improper use ... In this case, I have a fuse here ...
Author 0
Reply To quote A complaint
yes, that’s why the fuse is there (it’s possible self-igniting) ... I think more people get confused when they measure high currents with a mulimeter ... there is no fuse at all ... then something is burning ...
+1
Reply To quote A complaint
If you want to save a piece of wire and a plug, you just need to put out the sockets for switching the probes in place of the switch: the sockets are cheaper and more reliable than the switch, and most importantly, it excludes the possibility of accidentally supplying mains voltage to the input in a mode that is dangerous for the device.
+1
Reply To quote A complaint
It’s a bad idea to use instrument probes. Someday, just forget and leave the instrument switch on. On this, all experiments will end ...

DIY categories

We advise you to read:

Hand it for the smartphone ...