Desktop energy seed lamp

Step 32 The electronic circuit

Take you transistor and connect the 1K resistor to the middle pin ( base )

A transistor has 3 legs, Emitter, Base and Colletor.

If you look at the 2N3904/2N2222 the flat side towards you ( facing up)

It goes like this

E B C
Emitter Base Collector

Remenber that!

Comments

[transistorguy]

I'm worried about the power consumption from the LEDs. It seems that when I try this, all of the LEDs in the circuit get dim. I would like them brighter. Anyway I can do this? I'm thinking a more powerful transistor....

[tato312]

can I use a C9015 transistor instead of the N3904/ N2222? I really dont know which is the difference between them thnks

[robomaniac]

hello I check the datasheet of the 9014 and it seems to be a general purpose transistor like the 2N3904. It can drive 150mA. The 2N3904 can do 200mA.

2N3904/ 2N2222 = C9014 NPN Small Signal
2N3906 =  C9015 PNP Small Signal

the 2N2222 can drive a lot more current, 1000mA!

so yes that could work

have fun!

[tato312]

or maybe a C9014 transistor (a NPN transistor too) instead of the N2222? would it still work?

[animaster]

and did you solder it already?

[animaster]

if you have metal film: brown -brown - black -black -brown if you have the one displayed, then it should be: Brown - Black - Red - Gold I took the metal film, since it is more accurate to 1k than the one displayed metal film: 1% accuracy displayed one: 5% accuracy