I hope you enjoyed the project! I'm waiting for your suggestions and comments. You can find parts from Aliexpress. Multimeter: s.click.aliexpress.com/e/_mPIqv7u DC-DC Step up: s.click.aliexpress.com/e/_DDcypYD TP-4056: s.click.aliexpress.com/e/_DBMZxA5

Can use a 7S nimh 9v battery (like EBL brand), buy 2 of them, keep one float charged at 1mA so they're ready to swap. Or just buy 1 of them, and use a USB input built in to the multimeter (as shown in video, but a booster supply instead of a charger) to go straight to a resistor (to limit current to 1mA) to the 7S 9v nimh battery, so that it can be charged when not in use. (Would take about 2 weeks to fully charge if flat, but nimh won't overcharge at this ~C/250 rate, hence also covering the issue of cell balancing.)

Battery must be drained because it is boosted all the time even if the multimeter is switched off, u better put a switch button outside for battery connected to step up module

@LifeHackTipz

2 ай бұрын

Yes, you are absolutely right. I realized it two days later when the battery was exhausted. :) Thank you for your feedback.

@bukvodelreklama592

2 ай бұрын

@@LifeHackTipz У блока повышения большой ток при отсутствии нагрузки. Есть более экономные.

@bukvodelreklama592

2 ай бұрын

​@ckTipz DW01 менять на S-8261ABMMD-G3M !!! Она отключит нагрузку при 2,8В и включит только при начале зарядке. Иначе убьешь аккумулятор

Might want to use a PTC fuse close to the cell, wrapped in heatshrink, for safety.

The idea is dope. Specially the fishing line part. Thanks for sharing.

@LifeHackTipz

2 ай бұрын

Thank you, for your feedback.

Better to use 2S battery, with step up charger. Charging will go faster, with higher currents, and DCDC will be stopped when multimeter working.

Плата зарядки с батареей ,дороже мультиметра)

hi.switch?ON and OFF?????

Interesting project although picking a multimeter for this is an odd choice imo. Would love to see a electronic tootbrush get converted from NiMH to LiPo with charge limiting for practically unlimited battery lifetime.

@LifeHackTipz

2 ай бұрын

@KingKong-mp6gj It's a really good idea. First of all, I need to find an electric toothbrush. I noted your suggestion. Thanks for your comment.👍

Eu colocaria um interruptor

If the USB-C jack is galvanic isolated from the multi meter itself then this is a smart idea, but if not, then it is potential dangerous.

@LifeHackTipz

2 ай бұрын

When I looked at the + and - leg of the multimeter from the USB jack with buzzer mode, I saw that there was no transmission. Do you think it is a sufficient test? Thank you for yor comment

@K2teknik.

2 ай бұрын

@@LifeHackTipz No it is not a sufficient test, but it is sort of a starting point. You need a second multimeter and measure resistance from any/all pins and the shield of the USB to all of the input jacks of the multimeter one by one, and do this at all positions of the rotary dial's positions of the multimeter under test. You can make a custom USB cable with all pins shorted and connected to the shield as one measuring point, and a other custom cable with all the jacks of the multimeter under test shorted as the other measuring point, that will save you a lot of time. In the real world you would make this isolation test with a isolation tester with a testing voltage of 500-1000 Volt, but it may fry your multimeter under test. Professional multimeter's with build in rechargeable battery's have either galvanic isolated in the charging circuit, or they are made so that you just can't use the instrument while charging, and there are damn good reasons for this, that reason is your safety.

@LifeHackTipz

2 ай бұрын

​ @K2teknik. I will try the method you described with a second multimeter and a short-circuited type-c cable. Thanks for your information. I think thi test will be enough. I work with low voltage as a hobby and I don't want to fry my low-budget multimeter 😀 As you said, those who work with high voltages should prefer a more professional device. Have a nice day.

Nice video 👍, i really like your working method 👍👍👍👍

@LifeHackTipz

2 ай бұрын

Thank you for your feedback.

What causes the red charging light to glow?

@LifeHackTipz

2 ай бұрын

The one I have is the TP-4056 clone. The problem was solved with the TP-4056 I bought from a different place. There are so many clone TP-4056 in the market. You need to be careful when buying. Additionally, it would be logical to add a switch between the booster and TP-4056. When the multimeter is off, the booster consumes a little electricity.

@bukvodelreklama592

2 ай бұрын

@@LifeHackTipz И DW01 высасывает аккумулятор до 2,5В . Она отключает нагрузку при 2,5В и снова включает при 2,9В. Рекомендую ее менять на S-8261ABMMD-G3M . Она отключит нагрузку при 2,8В и включит только при начале зарядке

What was the 2.2K resistor for? Thanks!

@LifeHackTipz

Ай бұрын

In order for the batteries to have a long life, it is necessary to charge them with a current value of approximately half of the battery capacity. So I changed resistor R3 to change the charging current.

@MicSokol

Ай бұрын

Thank you very much@@LifeHackTipz

Muy buena idea años cambiando baterías... jajajaja 😅

Red led is always on??

@MrPirelin

2 ай бұрын

Porque lo conecto mal. Uso mucho esas tarjetas y al estar bien instalada solo prende el rojo cuando está en carga. Una vez completada la carga alumbra azul. Pero muy buena idea. Tengo un mini tester que usa una batería pequeña de 12v y voy a tomar en cuenta este proyecto para pasarlo a batería recargable. Gracias. Bendiciones

Этот мультиметр не стоит таких усилий, средств и потраченного времени. Проще купить заряжаемую батарею на 9 в.

@MrPirelin

2 ай бұрын

Pero igual debes comprar el cargador para esa batería. Sale más caro

Multimeter purchase link

@LifeHackTipz

2 ай бұрын

you can find in aliexpress s.click.aliexpress.com/e/_mPIqv7u

@commandoPR

Ай бұрын

Vocabulary store place

9 volt batteries are very low cost so the point of this conversion is what?

@LifeHackTipz

2 ай бұрын

In my country a 9v battery is sold for the same price as this multimeter

@lucapesce3335

2 ай бұрын

@@LifeHackTipz sure, and also BMS, LiIon Battery, Booster, glue, resistor, wires, solder, fishing rope and time are probably cheap there. Loved the video, thank you

Vale más el sistema de carga que el multímetro.

@LifeHackTipz

2 ай бұрын

Tienes razón, incluso una batería de 9 voltios es más cara que este multímetro. :)

@misterpacoalaparato

26 күн бұрын

Ese multimetro vale unos 4€ en aliexpress, el TP4056 se puede conseguir por menos de 0.50€ en algunas ofertas (yo compre 5 por 2€ hace poco), y el MT3608 no recuerdo y una bateria vieja es reciclada, vale poco. El problema es que las pilas de 9V se venden en pocas tiendas y cada vez son mas caras, la ultima vez que quise comprar una de marca se iba a los 4€, termine comprando unas baratas de marca blanca y duraron poco

Multimeter 9v batteries last a very looooong time. its pointless

0r just carry a spare 9v battery