In article <S6MLj.68$LB3.47@xxxxxxxxxxxxxxxxxxxxxx>,
tenplay <tenplay@xxxxxxxx> wrote:
I own an old Eveready #QCC4 battery recharger. The indicator lights
work with all batteries except for 9v's. On the lid, the directions say
to look at the manual for the case with 9v's. I cannot find the
directions and the Eveready website does not offer any for my recharger.
I once had a charger like this; while the AA/AAA cells were inserted
horizontally into wells, the 9V battery went standing on its top, plugged
into a connector sitting in between the AA/AAA wells. The indicator light
didn't work either. As I recall, the design was such that the 9V charging
circuit was pretty much an afterthought, and entirely separate from the
main circuit that charged the 1.2V cylindrical cells.
Current flows from collector to base of PNP transistor ... The idea is that I can connect any convenient supply to the +/- connections on the left and a maximum current determined by the 0.3 ohm resistor will flow into the batteries.... I was surprised, however, to find that when no power source is connected the batteries seem to discharge into the circuit at about 20 mA. ... In my understanding of how transistors work, if the emitter is floating then no current can be flowing between the base and the emitter, and if no current is flowing between the base and the emitter than no current should be flowing between the collector and anywhere. ... There is some sort of "parasitic" effect in the transistor that I need to consider. ... (sci.electronics.design)
Re: Dont change your bateries with the game on. ...Changing batteries in an MPU while powered is NOT ... Lots of arcing, ground path, static discharge,...ground plane is identical; the ground plane of the game (assuming the ...circuit was designed to handle up to that amount, ... (rec.games.pinball)
Re: short circuit :/ ... I made a circuit for a simple serial temperature system, ... I have tested the connections from the jack and they look ... First off, test the batteries -- 4.3V sounds a little low, ... If you've got a 100 ohm resistor around, ... (sci.electronics.basics)
Re: Circuit Design Q. - battery charger ... #2 - The Booster Circuit - I intend to directly use the circuit illustrated ...batteries fairly quickly, BUT I don't want to "fry" the batteries - hence, ... OR six LEDs depending upon the size/design of eachlamp I'll be making) as ... (sci.electronics.design)
Re: Battery bias directly to grid ... Maynard, later Lord, Keynes, was a director of the Ballet Lambert. ... batteries in the cathode circuit....batteries *in series* with the grid. ... > was redrawn to show the batteries in the cathode circuit.... (rec.audio.tubes)
