IRToyv2-transmitter-values.xls
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IR Toy v2 constant current driver calculationsCalc By R
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100mA200mA125.00mA
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TransistorVf of p-nVbe0.7V0.7V0.7V
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DiodesVb 1.4V1.4V1.4V
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Ve0.7V0.7V0.7V
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LED current
Current100mA200mA125.00mA
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Rsink (R4)7ohms3.5ohms5.6ohms
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Resistor power dissipation
P0.070W0.140W0.088W
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Emitter current
Ie0.1A0.2A0.13A
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Transistor dissipation
VCC5V5V5V
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Vf_IR1.35V1.35V1.35V
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watts0.295W0.590W0.369W
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Base resistor
vcc5V5V5V
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I_lim1mA1mA1.20mA
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Rbase (R5)
3600ohms3600ohms3000ohms
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