https://www.youtube.com/watch?v=wVnAH17f4jg
A gloriously dumb USB powered NiMH and NiCad battery charger that will guarantee a full charge every time, but only if you're not in a rush. A trashy 500mAh

https://archive.org/details/bigclive_20220312
Simple NiMH battery charger (with PCB files) by Big Clive. Publication date 20220312 Usage Attribution-NonCommercial-NoDerivs 4.0 International Topics bigclive Language English. A gloriously dumb USB powered NiMH and NiCad battery charger that will guarantee a full charge every time, but only if you're not in a rush. A trashy 500mAh cell will

https://maker.pro/forums/threads/simple-nimh-charging-circuit-and-resistance.288169/
Audioguru said: Modern Ni-MH batteries made by Eneloop (Sanyo/Panasonic), Energizer and Duracell hold a charge for one year and are sold precharged. They do not recommend trickle charging if you want them to last for 5 years. 0.1C is a recommended overnight (10-14 hours) charge rate for Ni-MH batteries.

https://www.reddit.com/r/BigCliveDotCom/comments/tcny85/simple_nimh_battery_charger_with_pcb_files/
Simple NiMH battery charger (with PCB files) From the description: """. A gloriously dumb USB powered NiMH and NiCad battery charger that will guarantee a full charge every time, but only if you're not in a rush. A trashy 500mAh cell will take about a day to charge, while a luxuriously high capacity cell could take most of a week to charge

https://www.radiomuseum.org/forum/a_simple_charger_for_ni_mh_battery_packs.html
Unfortunately the voltage variation was well pronounced in the old Ni-Cd batteries, where gas gave also the so called 'memory effect', but it is much less evident in the Ni-MH cells. Actually manufacturers ask for a combined temperature rise monitoring, a dT/dt sense circuit in addition to the -dV/dt, when using high charging current.

https://www.circuits-diy.com/nickel-metal-hydride-nimh-battery-charger-circuit/
Here we design a Simple NiMH (Nickel Metal Hydride) battery charger circuit with a few easily available components and it can provide constant voltage and current to the target 9 Volt NiMH battery. These types of batteries are not self-discharge quickly and provide maximum voltage and current in minimal size.

https://www.codrey.com/electronic-circuits/nimh-battery-charger/
The cheapest way to charge a NiMH battery is to charge at C/10 or below (10% of the rated capacity per hour) for 15 hours, and the minimum voltage to get a full charge must be set to at least 1.41 volts per cell at 20 degrees C. This "overnight charging" method does not require an end-of-charge sensor and ensures a full charge.

https://www.wellpcb.com/nimh-battery-charger-circuit.html
The NiMH charger circuit has many features, but here's a brief look at the main ones. First, it has a complete fast charger controller for 1-, 2-, 3-, or 4-series cell NiMH batteries. Second, it has an input supply range from 4.5V to 10V. Also, the circuit automatically detects the battery. Fourth, the circuit doesn't need a sense resistor

https://www.circuitbasics.com/battery-chargers/
This charger can charge both NiCd and NiMH batteries: The circuit is designed to charge a 12V battery at 50mA. The LM317 forces a 1.25V reference voltage between Vadj and Vout. To calculate the value of R3 to give a particular charging current, use this formula: R = V / I. So with V at 1.25 volts and I at 50mA, R = 1.25V / 50mA.

https://forum.arduino.cc/t/arduino-based-opensource-nimh-battery-charger/90201
Nickel-metal hydride battery. A nickel metal hydride battery (NiMH or Ni-MH) is a type of rechargeable battery. The chemical reaction at the positive electrode is similar to that of the nickel-cadmium cell (NiCd), with both using nickel oxide hydroxide (NiOOH). However, the negative electrodes use a hydrogen-absorbing alloy instead of

https://www.homemade-circuits.com/charging-small-nimh-battery-from-air-by/
Discussing how to Derive Free 9V from Air - By Steven Chiverton. Mr. Steven has devised an ingenious way of collecting energy from the air and using it for various useful purposes like for charging small 9v NiMh battery, or for making high voltages etc. The experiments are indeed very intriguing and I definitely want to share them with you all

https://www.allaboutcircuits.com/projects/build-a-solar-battery-charger-for-ni-mh-batteries/
We have lithium ion, nickel metal hydride (Ni-MH), and nickel cadmium (NiCd). So let's start with the nominal voltage for lithium ion. It varies from 3.2 V to 3.7 V, Ni-MH is 1.2 V, and NiCd is also 1.2 V. Because most consumer devices use either internal batteries, AA, or AAA batteries. Let's eliminate the lithium ion because its nominal

https://www.eleccircuit.com/nicad-battery-charger-by-ic-lm317t/
The batteries that are charged are 4 AA 2000mAh Ni-MH batteries while they are in series with a normal total voltage of 4.8V at 2000mAh. And they have a maximum safe (not hot) voltage of about 6V. LM317 constant current. We use the same because it charges the same 2,000mAh battery.

https://canuckgeeks.ca/simple-nimh-battery-charger-with-pcb-files/
A gloriously dumb USB powered NiMH and NiCad battery charger that will guarantee a full charge every time, but only if you're not in a rush. A trashy 500mAh cell will take about a day to charge, while a luxuriously

https://www.homemade-circuits.com/simple-ni-cd-battery-charger-circuit/
Simple Adjustable Nickel Cadmium Battery Charge. Practically every single nickel-cadmium battery in use today could be charged using the following universal adjustable Ni-Cad battery charger circuit. For batteries with a capacity ranging from 50 mA/h to 2500 mA/h, the rate at which they are charged can be adjusted through a rotary switch.

https://www.diyaudio.com/community/threads/simple-and-safe-nimh-charger.119992/
1. corrected the current source (thanks very much, gfiandy!) 3. a bit more voltage; 1.5V per cell seems safe; if you like to squeze more from you battery pack, use a 7.5V Zener AFTER checking the specs of the battery manufacturer. Hope this may be of help for someone.

https://www.uetechnologies.com/homemade-battery-charger/
Simple NiMH battery charger (with PCB files) The USB-powered charger we learn to build in this video is designed for NiMH (nickel metal hydride) batteries and NiCad batteries. As the YouTuber writes in the introduction, a high-capacity cell will probably require the best part of a week to charge fully - but it works well, slowly but surely

https://www.batteryskills.com/how-to-make-a-homemade-battery-charger/
Assembling the Circuit. First, gather all the necessary components, including a transformer, bridge rectifier, diode, TP4056, battery holder, DC power jack, and alligator clip. Connect the transformer to the bridge rectifier, then connect the diode to the output of the bridge rectifier. Connect the output of the diode to the TP4056 module.

https://electronics.stackexchange.com/questions/604728/how-can-i-charge-a-nimh-cell-with-a-5-v-2-a-adapter
You need a Ni-MH battery cell CHARGER CIRCUIT, not a simple resistor. \$\endgroup\$ - Audioguru. Commented Jan 17, 2022 at 17:05. 1 ... NiMH can handle some overcharge at low current, but for best lifespan you should match the charging time to the state of charge. This may be difficult to determine if it is partially discharged, in which case

https://forum.allaboutcircuits.com/threads/simple-nimh-charging-system.85390/
Simple DIY Load Tester For 40 Volt Lithium Battery: Power Electronics: 6: May 17, 2024: O: Simple soldering issue on a USB cable: General Electronics Chat: 11: May 1, 2024: U: simple NiMh battery discharger: Power Electronics: 5: Dec 24, 2017: J: Help with simple NiMH battery charger: Power Electronics: 3: Mar 22, 2012: J: Simple NIMH or NICAD

https://www.circuits-diy.com/multiple-nicd-nimh-battery-charger-circuit/
Multiple NiCd & NiMH Battery Charger Circuit. NiMH and NiCd chemical-based batteries, fundamentally have the same attributes from the perspective of charging and discharging features and properties. The normal midpoint voltage is equivalent to 1.2 V. Their discharge voltage is 0.9 V (75% of 1.2 V). These batteries are ordinarily charged with a

https://forum.allaboutcircuits.com/threads/simple-nimh-battery-discharger.143657/
34,858. Dec 26, 2017. #6. Here's the LTspice simulation of a constant-current battery discharge circuit using a TLV431 (not TL431) shunt reference regulator that uses the battery voltage as a supply. The discharge constant-current is determined by the value of R_CC (≈0.68 / R3). The cutoff point is determined by the setting of pot U2 (giving

https://www.edaboard.com/threads/need-battery-charger-3-aaa-nimh-battery.18994/
This Reference Design is a battery charger that fully implements the latest technology in battery charger designs. The charger can fast-charge all popular battery types without any hardware modifications. The charger design contains complete libraries for SLA, NiCd, NiMH and Li-Ion batteries. Features.