Hi all
i had disassembled an old rc car toy
i found an h-bridge in its circuit is it okay to use it to my arduino ?
after i unsoldered the h-bridge
is their is danger on my arduino if i connected it to power ?
fraizor:
i found an h-bridge in its circuit is it okay to use it to my arduino ?
First off, how do you -know- this is an h-bridge IC? The markings in your image certainly don't seem to convey that impression to me.
Given that it came from a "toy RC car", and that it is a 16 pin DIP IC, and without seeing the rest of the PCB from which it was removed from - my first impression is that it is the RX2 half of the TX2/RX2 chipset (or one of the other TX/RX variants).
Such an IC is -not- an h-bridge. Typically in toy RC cars, the common TX2/RX2 chipset is used for control; the TX2 (in the transmitter) outputs a specific pulse train, which is then picked up via a receiver in the car that is connected to an input pin on the RX2 chip (which is a 16 pin DIP IC, just like in your picture); this signal is then decoded to turn on/off certain pins on the chip. Those pins are then in turn connected to various control functions of the RC car. The actual h-bridges on such a car are usually built from discrete mosfet or bipolar transistor drive circuitry (I have also seen hybrid relay h-bridges as well, but those are unusual).
Without being able to see the actual PCB of the vehicle, there isn't any way to accurately tell you what that chip you have actually is or what it does (or may do). Regardless, until/unless you can find a datasheet for it, all we can do here is simply guess at its operation. It's difficult to tell from your picture, but is there a sticker or label on that chip (ie, what reads "27 MHz") that can be peeled off? If so, do that then clean up the chip (of label goo), and post a new picture (with better lighting) so we can read what the IC really is. Again, I suspect it isn't anything like an h-bridge.
Further reading on these cheap RC cars and the TX2/RX2 chipset can be found via this thread - I suggest that you familiarize yourself with it: