I am building a fully featured breadboard/prototyping box for audio circuits and would like to include a current limiting light bulb that will be in circuit when I apply power to the box and then I can switch it out if everything looks OK. I am wondering how I can calculate an appropriate wattage bulb to use.
Theres four main components to my prototyping rig, two power supplies and two circuits:
- One linear +/-12V power supply that feeds the breadboard and what ever circuit is on it which will not exceed 100mA (if everything is hooked up properly)
- One linear +15V power supply that feeds a 2.5W audio amplifier
With that said, how can I calculate the wattage of a bulb that will limit enough current to prevent damage to any components but still allow everything to power up to idle state?
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