Create accountLogin

Recent searches

No recent searches

Search options

Only available when logged in.
mastodon.social is one of the many independent Mastodon servers you can use to participate in the fediverse.
The original server operated by the Mastodon gGmbH non-profit

Administered by:

Server stats:

330K
active users

mastodon.social: AboutStatusProfiles directoryPrivacy policy

Mastodon: AboutGet the appKeyboard shortcutsView source codev4.4.0-nightly.2025-04-15

#nimh

1 post1 participant1 post today
Public
Tefida

Обзор зарядного устройства Panasonic Eneloop Smart & Quick BQ-CC55

В сегодняшнем обзоре будет представлено зарядное устройство от компании Panasonic под названием Eneloop Smart & Quick BQ-CC55 с детальным описанием всех его характеристик и разбором всех его возможностей.

tefida.com/panasonic-eneloop-s

#panasonic#eneloop#enelooppro
Public
Grant Denkinson

#Research funded #Bisexual #Adolescents’ and Young Adults’ Risk for #Depression and Suicidal Ideation: Developmental Trajectories, #Risk and Protective Factors and Underlying Mechanisms thelantern.com/2025/01/3-6-mil #pansexual Christina Dyar, College of Nursing, #OhioState USA et al $3.6 million five-year grant from the National Institute of Mental Health #NIMH to study how microaggressions negatively impact this subset of #minority #youth. thelantern.com/2025/01/3-6-mil

The Lantern · $3.6 million grant awarded to Ohio State professor for research on impact of microaggressions on bisexual and pansexual adolescentsA lack of specialized research on bisexual and pansexual individuals might be responsible for health disparities among LGBTQ+ patients. Now, one Ohio State researcher is working to change that. Christina Dyar, assistant professor at the College of Nursing, and her co-investigators have received a $3.6 million five-year grant from the National Institute of Mental Health […]
Continued thread
Public
Cymaphore

Für alles andere bleibe ich definitiv bei #NiMH, aber für solche Sonderfälle ist das schon nicht schlecht.

Man muss aber china-typisch sehr aufpassen, welche 1,5V Li-Ion Zellen man nimmt und wo man sie kauft, da ist nämlich eine ganze Menge Schrott erhältlich :-) ... Die hier gibt es auch bei etablierten deutschen Händlern, was generell ein eher gutes Zeichen ist.

Die aufgedruckte Kapazität hab ich nicht nachgemessen, wäre aber gefühlt skeptisch, ob das so stimmt.

(4/4)

Public
MFierst

Het valt niet mee, tegenwoordig, om batterijen op te laden. Er zijn zó veel types bijgekomen... alleen bejaarden kennen waarschijnlijk nog de NikkelCadmium batterijen, NiMH is ook al gepensioneerd aan het raken en van Lithium zijn allerlei soorten.
Goed.
Gedoe.

Dus ik koop een superduper luxe acculader die van NiCad's tot aan LiFePo's weet.
Hop, batterij er in.
Mja.

Batterijlader twijfelt zelf ook, dus hij en ik kunnen het meteen goed vinden samen.
😊
#onzin #batterijen #NiMH

Public
Gorgeous na Shock!

I don't suppose anyone knowledgeable about and their charging mechanisms might have some insight as to what's going on, here...

This is the rechargeable battery for my new (to me) Phillips Velo PDA... It appears to be two cells tap-welded together, with a conductive band close to one end that has a lead going to this mid-point, presumably so the PDA knows it's allowed to recharge this one.

I'd like to recreate it, if possible...

Two green AA-sized cylinder batteries are joined by a small band of metal which appears to be wrapped in paper, labeled "120 (newline) PGC9". A powdered material is leaking out.
Continued thread
Public
JL Johnson :veri_mast:

PS: Once you revive a dud battery, it won’t have a great capacity. You can generally get back some of that by cycling it a few times.

I use the Opus BT-C3100 which is a handy device for all sorts of rechargeable chemistries and form factors, including 1865s.

My opus has a refresh option which will do three cycles automatically.

#DIY#rechargablebatteries#NiMH
Public
JL Johnson :veri_mast:

If your rechargeable batteries won’t charge, don’t give up hope. Modern chargers require the battery to have some small bit of voltage to start charging. So if you connect (in parallel +,+ and -,/-) a dud to a good battery for 30 seconds or so, that might be enough.

I built this simple rig and went through a dozen duds and got most of them to bounce back enough to get my Opus to take them. Huzzah!

Two one cell AA battery holders screwed into a small piece of wood. The red wires are connected to each other, and the black wires are connected to each other. Red and black do not touch! A good battery goes in one side and a bad battery in the other. Leave them for 30 seconds or so.
#DIY#rechargablebatteries#NiMH
Public
Raymond Russell

My DIY trickle #NiMH charger is complete.

I used a battery box from 5V led strip lighting to hold the batteries.

Putting my meter in circuit it read mid 60's milliamp charge per battery.

Here are two pictures. One is me testing it with croc clips connected and the other with permanent USB connection and lots of hotmelt glue holding things in place.

Charger being tested with crocodile clips coming from a USB power bank. There a two batteries in a 3 battery box. Normally they would be 3 batteries in series. I have adapted it to charge 2 batteries in parallel. Also visible charging LED for each battery connect to diodes and resistors to create the trickle charge circuit.
Similar picture to the other picture but with a permanent USB connector and lots of hotmelt glue holding and protecting the circuit in place.
#electronics
Public
Raymond Russell

Just trickle charged a really old #NiMH AA battery using a USB connector with crocodile clips on +ve and -ve. The -ve clip goes on the bottom of the cell and the +ve clips onto a little circuit with 1 diode, 3 resistors and an LED. The Diode gets the +ve clip and the 'bottom' of the circuit makes contact with the top (+ve) end of the battery. It is held on by an elastic band as is the -ve clip to bottom of the battery.
#electronics

Very basic circuit. Not even on veroboard. There is a diode at the top which is then connected to left hand branch of the circuit is two 100 ohm resistors in parallel to give 50 ohm value. The right hand branch has 100 ohm resistor and red LED in series with each other. Both branches of the circuit then come back together as the ground. The ground part can be attached (via elastic band) to the +ve side of the battery to be charged. The +ve power is applied to the diode at the top of the circuit and the negative power to the bottom of the battery. This connection is not shown in the picture.
Public
Fran 🇦🇷

I am trying to implement reverse polarity protection for a circuit powered by two NiMH cells.

Using a Schottky diode is too wasteful at such low voltages. It seems a MOSFET is the way to go, and after a deep dive in the Digi-Key parametric search, I think I have found a winner: DMN1019USN.

It is a 12V N-channel MOSFET that has only 41 milliohms when activated with 1.2V at the gate 🤩

diodes.com/assets/Datasheets/D

#electronics#MOSFET#battery
ExploreLive feeds
About