For example 2N3904 exhibits gain peak at 10mA while 2N2222 at 150mA.įor the time being, arduino is the Nano-technology with almost 40mA input or output current. 2N3904 is more useful in amplifier applications with fewer collectors current. As compared with 2N2222 it shows forward gain at lower current. It can control only one third of the current of 2N2222. The 2N3904 is also an NPN transistor with same characteristics like 2N2222 but with one difference. Actually the collector and emitter pins are interchanged.ĢN2907 is also a complementary general purpose PNP transistor with equal popularity.
However the pins order for P2N2222 is different from 2N2222. P2N2222 which has alike specifications excluding lower max collector current Ic.
2N2222 Transistor Equivalent:Īlternatives for the 2N2222 are now commonly available in TO-92 packaging e.g. The resistor R1 confirms to keep the transistor OFF when positive supply rail and base are not in contact with eachother. Here power supply section consists of transformer T1, capacitor C1, and bridge D1. The switches are arranged on the panel in a shuffle manner and so the relay works only when the switches are ON or OFF in the pre-described manner. The only case when the transistor Q1 becomes ON and the relay is activated when all the first five switches S0 to S4 are ON and the last five i.e. Other five parallel arranged switches (S5 to S9) are connected between transistor’s base and ground. A current limiting resistor R 2 is connected across the positive supply rail and base of the transistor along with five switches (S0 to S4) in series. The circuit has only one transistor with a relay as load at its collector.
The circuit is simple but really efficient and works the best. It consists of a relay, a transistor and some passive devices like resistors, capacitors and switches. One 2N2222 transistor code lock system is a simplest electronic code lock system. 2N2222 Transistor Circuit One 2N2222 Transistor Code Lock System: Description:
0 kommentar(er)
