components use
- transistor X 2 PNP TYPE
- l.e.d X 2
- 560 ohms resistors X 2
- 860 ohms resistor X 2.
We started of making the circuit on a lock master to plan it out 1st. before that we had to work out what resistance to use. after hooking up the components supplied 12v but the clear l.e.d did not work, i looked at the bottom peace their was a lose connection on R3 fix that and the light was glowing like never has.
Formulas used
B = IC/IB
V - VD
V=R x I
VP-VDC/IB=R
how it was working.
the volts goes though the circuit and makes the current flow, the 12v is going through R14 R15 then goes to the l.e.d then to the collector. the 5volts PWM going to R13 R16 and them going to the base of the transistor which then open the gate to C and E of the transistor to let flow through.
volt drop test.
R14 R15 v.d 9.6v
R13 R16 v.d 3.6v (vs 5v)
L.E.D v.d 1.76
L.E.D (CLEAR) v.d 2.1v
V.B.C 12.3
volt drop test.
R14 R15 v.d 9.6v
R13 R16 v.d 3.6v (vs 5v)
L.E.D v.d 1.76
L.E.D (CLEAR) v.d 2.1v
V.B.C 12.3
Hi Herez you list the formulas but not what they relate to and in fact parts of the formulas are missing.You list your volt drops but unless you understand what they are telling you what is the point? also their needs to be an in depth explanation on operation (unfortunately ours if only half the story)and a reflection on how you could improve this circuit /what you learnt from this project.
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