Lately I was trying to figure out the pin assignment on those 4 pin chips that are found inside of these devices.
I have discovered that there are two different kinds. The Dragon fly that I finally managed to recreate uses only 1 1.2 volt rechargeable battery. But not all for pin chips are the same. As I managed to recreate another circuit using a different chip it takes 2 1.2 volt batteries to make it work. The only other difference seems to be the Choke that is used.
The biggest problem here id how to tell which chip uses 1 battery and which uses 2.
One chip was the AN2816 i think, the other is a YX8018.
The schematic I had showed a battery but did not state what it was. I recreated the circuit using 1 battery and nothing happened. I was about to give up thinking the chip I had was no good. When I noticed the voltage missing it got me thinking. I have one of those multicolored globes and it uses 2 1.2 volt batteries. So I figured I would give it a try and it works like a champ.
The fact that you can not find a data sheet on these devices makes it a little harder.
Moral of all of this is these little 4 legged chips are impossible to tell apart.
So if you recreate a circuit using 1 battery and nothing happens try using 2. Remember to wire them in series.
I have discovered that there are two different kinds. The Dragon fly that I finally managed to recreate uses only 1 1.2 volt rechargeable battery. But not all for pin chips are the same. As I managed to recreate another circuit using a different chip it takes 2 1.2 volt batteries to make it work. The only other difference seems to be the Choke that is used.
The biggest problem here id how to tell which chip uses 1 battery and which uses 2.
One chip was the AN2816 i think, the other is a YX8018.
The schematic I had showed a battery but did not state what it was. I recreated the circuit using 1 battery and nothing happened. I was about to give up thinking the chip I had was no good. When I noticed the voltage missing it got me thinking. I have one of those multicolored globes and it uses 2 1.2 volt batteries. So I figured I would give it a try and it works like a champ.
The fact that you can not find a data sheet on these devices makes it a little harder.
Moral of all of this is these little 4 legged chips are impossible to tell apart.
So if you recreate a circuit using 1 battery and nothing happens try using 2. Remember to wire them in series.