Is this true?

[Zarish123]

Can someone tell me if this circuit is real?

 

[JimB]

Looks like a load of nonsense to me.

JimB

 

[MacIntoshCZ]

So he connect transistor and resistor in series with clock. Thats briliant energy saving circuit.
nope

 

[MacIntoshCZ]

Looks like a load of nonsense to me.

JimB

 

[resr1286]

This circuit uses transistor half-biased, it works but the transistor limits the current and gets hot, nullifying the use of old Li-ion battery, which is another topic how to isolate good cells from bad ones, it's just easier to use good Ni-MH that are usually the same capacity and lasts as long if not even longer._

 

[gophert]

Well, if you ever pulled an old laptop off a shelf, are the batteries still charged like when you put it away?
Rechargeable Lithium batteries generally have a self-discharge rate that is not good for long term power storage.

**broken link removed**

 

[Zarish123]

Well, if you ever pulled an old laptop off a shelf, are the batteries still charged like when you put it away?
Rechargeable Lithium batteries generally have a self-discharge rate that is not good for long term power storage.

**broken link removed**

Thank u I understood

 

[Zarish123]

This circuit uses transistor half-biased, it works but the transistor limits the current and gets hot, nullifying the use of old Li-ion battery, which is another topic how to isolate good cells from bad ones, it's just easier to use good Ni-MH that are usually the same capacity and lasts as long if not even longer._

Here is why a transistor is used

 

[Zarish123]

So he connect transistor and resistor in series with clock. Thats briliant energy saving circuit.
nope

Yes or no

 

[MacIntoshCZ]

Yes or no

Yes, but clock will be slowed down. Probably wont work properly.
He only limit current....
Its nonsense

 

[audioguru]

Yes, but clock will be slowed down. Probably wont work properly.
He only limit current....
Its nonsense

The transistor is an emitter-follower with a 0.65V base-emitter voltage drop and is biased with two identical-value resistors to reduce the 4.2V battery voltage to 2.1V for the base. Then the clock gets 2.1V - 0.65V= 1.45V like a 1.5V ordinary disposable battery. The clock motor is tiny and uses a tiny current.
When the battery charge is run down then it must be recharged or replaced.

 

[Zarish123]

Thank u