#16
|
||||
|
||||
We used to get 4.5V batteries from disposable flashlights like these:
http://www.amazon.com/Dorcy-41-1501-.../dp/B001PII83C We used them for our homemade telegraph, model rocketry (squib firing) and a string of Christmas lights that originally ran on 6V, but worked fine on one of those batteries. The flashlights were sold at a flea market we used to go to on Sunday, and we would ask for the dead flashlights - most were dead due to a bad bulb, but the guy sold them for a dollar, so there was no profit in opening one up and replacing the bulb. Sometimes we could get a half-dozen dead ones from him. When you rip the battery out of the flashlight, there are two tabs that can be soldered to, or even spot welded - we used a 120,000uF 10V cap, and discharged it through some brass rods scrounged from old TV antennas.
__________________
Brian USN RET (Avionics / Cal) CET- Consumer Repair and Avionics ('88) "Capacitor Cosmetologist since '79" When fuses go to work, they quit! |
#17
|
||||
|
||||
In Romania, 9 Volts batteries where used on imported electronics. Or some copyed from forgein stuff, like the "Felix" C.E. 835 and 845 <<Mathematician>> pocket calculators: http://www.vintagecalculators.com/ht...library_f.html
|
#18
|
||||
|
||||
Quote:
That style camcorder was gone by the mid 80's IIRC.
__________________
Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4 |
#19
|
||||
|
||||
Forgot one device that requiers 9 Volts batteries: the digital multimeters.
When I went to the supermarket chain from I usually do the shoppings, I took a look at those cilindric "vessels" in which you dump used batteries and there where a few 9 Volts ones. In 2 different shops (oh, those bins where filled up to the top and I coulnd't grab 2 rechargable batteries because they where in the middle of the bins, not up). When I went to the market on Friday, on my way home 2 guys asked at shop if they have 9 Volts batteries and the seller saye they end up 'em... so they went to the covered market building. Lucky me, I live in a area with many stores. One of the reasons that I want to live in this neiberghood for the rest of my life. |
#20
|
||||
|
||||
It is true that 9 Volts batteries with cells like the one from the right are the best? https://upload.wikimedia.org/wikiped...?1449706470888
|
Audiokarma |
#21
|
||||
|
||||
But did you see in the recent time anyone buying C (R14) and D (R20) rechargeble batteries?
|
#22
|
|||
|
|||
Not rechargable versions of them no, but the regular alkaline versions of those batteries are extremely common in America, the D Cells are used very commonly in flashlights, and portable radios, and C batteries are used in clock movements (pre-quartz clock movements) and in portable cassette recorders and radios, and some flashlights.
|
#23
|
||||
|
||||
Quote:
I do not use any C size rechargables, but use the "sub-C" size for rebuilding power tool battery packs. These are also Nimh cells and rated at 3800 mA hours. jr |
#24
|
||||
|
||||
Funk me, an osciloscope that uses batteries! Never seen one!
In Romania, most common rechargable batteires are AA (R3) and AA (R6). For remote controls, photo cameras and flashlights. The rest... I don't know. As for flashlighs, most people are using L.E.D. ones or if not, they uses batteries. Big portable radios or radio-cassette units are no longer fashionable outisde the house. |
#25
|
|||
|
|||
Quote:
|
Audiokarma |
#26
|
||||
|
||||
Quote:
http://www.videokarma.org/showpost.p...35&postcount=1 jr |
#27
|
||||
|
||||
Same in Romania, in countryside or some small cities. In Bucharest most problems are caused by the old electric network and we have 4-5 power plants in the city. I sometimes do need battery powered stuff to used when there is a problem in my area - few times a year, 30 minutes - 2 hours.
You made me to ask mysefl a good question: in Romania how many people do use battery powered radios to listen to when there is no electrical power? |
#28
|
||||
|
||||
The people who made the 4.5 Volts and 9 Volts batteries where smart ones. They are good for testing small light bulbs. I use the 9 Volts one to test higher voltage light bulbs... you can realize if it's a 12 Volts bulb or 24 or 26 Volts one.
Well, the filament is sometimes a clue, but I want to be shure that I get my hand on 26 Volts light bulb. 26 Volts - 0.1 Ampers light bulbs where used in some old Christmas tree lights (series suply, if you connected it at 220 Volts) and nowdays are very hard to find! |
Thread Tools | |
Display Modes | |
|
|