Wow, so unsafe. No detection nor control circuits to prevent damage. The ONLY time this battery charger would be safe to use is if 1) you know what to be aware of to prevent damage based a working knowledge of the chemistry of the battery being charged AND 2) you sit, watch, and monitor for those conditions the entire time the battery is in the charger.
@@jimmybrad156 Yes this circuit will overcharge and damage NI-MH batteries, you should use it with a timer and calculate the time needed for a full charge based on the battery capacity, charge current and battery efficiency. A popular cheap charging method for NI-CD and NI-MH batteries is 0.1C constant current charging for 13-16 hours. Or you could buy a quality smart charger for like 20$ that can charge them faster and accurately terminate the charge cycle once they’re full.
@@bluerilius4362 The AUD$10 ikea ones are great value. Individual led status, dv/dt. You can get little CN3085 based charger modules for projects too :)
@@jimmybrad156 I just checked the cn3085 datasheet and it seems like a pretty useful little charging chip for projects, it apparently can do up to 1000ma constant current with a programmable timer! Super useful, thanks for the heads up! :)
@@TARIQLAB hi, thanks, so would i need 4 of these entire circuits to charge 4 batts.....and 8 of these entire circuits to charge 8?.....also coukd i use a 33r resistor instead of 3 100r ?...thanks.
@@100roberthenry I suspect the reason for 3x 100 ohm resistors in parallel instead of a single 33 ohm resistor is for the added heat dissipation. A single resistor but rated for a higher wattage should also work fine.
The best among many others on YT. Congrats and tks.
♥️♥️
Best .
This is giving me an output of 1.3v , 0.150A . Just add a capacitor 16v 100uf at output for more better result 😊
nice.
how many resistors for 12v in, and 9v out for 9v charger?
Battery voltage?
@@TARIQLAB yes; charge a 9v nimh
@@TARIQLAB I want to charge a nihm 9 volt battery.
I find all videos for 1.2v. but, none for 9v.
I can use a 12v power source.
I think 10-22 Ohm,
Give me some time will test then let u know
@@TARIQLAB I appreciate it.
Thank you!
Can i use 2x a 100r resistor and a 1N4001 diode and is this circuit save with solar energy?
39 Oms R 1 or half watt ok to charge with 5 v USB charger
Wow, so unsafe. No detection nor control circuits to prevent damage. The ONLY time this battery charger would be safe to use is if 1) you know what to be aware of to prevent damage based a working knowledge of the chemistry of the battery being charged AND 2) you sit, watch, and monitor for those conditions the entire time the battery is in the charger.
2 cell charge kar sakte hain
Yes
Its better if can autocut off
Won't this overcharge / wreck battery (make it leak) once full?
This method is used in all trimmers,
@@TARIQLAB That doesn't make sense.
@@jimmybrad156 Yes this circuit will overcharge and damage NI-MH batteries, you should use it with a timer and calculate the time needed for a full charge based on the battery capacity, charge current and battery efficiency.
A popular cheap charging method for NI-CD and NI-MH batteries is 0.1C constant current charging for 13-16 hours.
Or you could buy a quality smart charger for like 20$ that can charge them faster and accurately terminate the charge cycle once they’re full.
@@bluerilius4362 The AUD$10 ikea ones are great value. Individual led status, dv/dt. You can get little CN3085 based charger modules for projects too :)
@@jimmybrad156 I just checked the cn3085 datasheet and it seems like a pretty useful little charging chip for projects, it apparently can do up to 1000ma constant current with a programmable timer! Super useful, thanks for the heads up! :)
will tgis work for charging 4 x 1.2v batts in parallel.....or even 8 ?...
Use same value 1 watt or 2 watt resistors, and also use 5 amp diode
@@TARIQLAB hi, thanks, so would i need 4 of these entire circuits to charge 4 batts.....and 8 of these entire circuits to charge 8?.....also coukd i use a 33r resistor instead of 3 100r ?...thanks.
Sir aap bahut achha kam kr rahy hain lykan jo parts istamal krty hain un ka number dekhny ka chance kam dayty hain.
@@100roberthenry I suspect the reason for 3x 100 ohm resistors in parallel instead of a single 33 ohm resistor is for the added heat dissipation. A single resistor but rated for a higher wattage should also work fine.
@@thirstywatersfreeaudiobooks thanks, yes that makes sense...cheers
I want to charge 2.4 Volt(2×aaa, in series connection) input voltage is 16 Volt, pls help me
Soon i will upload video
If you use a ~1360 ohm resistor it should take about 3.3 days @ 10mA to charge from flat, plus at 10mA you can't overcharge it.
Work it with 4v and a NiMH battery
Yes, but decrease the value of resistors to half
Does it stop charging when the battery is full charged?
no , its dumb type of charging it has no control ic
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