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puffer [2015/12/13 00:13] zashi created |
puffer [2015/12/18 19:39] zashi [Problems and Constraints] |
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The firing capacitor(s) have been scavenged from old external flashes. | The firing capacitor(s) have been scavenged from old external flashes. | ||
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+ | ===== Problems and Constraints ===== | ||
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+ | * **Constraint** I'd like to run off a single D-Cell battery. Per my math, even if I go for a 2400 MFD capacitor bank (at 330V), a single D-Cell has enough Watt-Hours to charge over 300 times. The ease of changing out and cool-factor of replicating the single-cell power source of energy weapons from Fallout is very appealing. | ||
+ | * **Challenge** How do I get a more workable voltage out of a 1.2V cell? I need about 3 volts to drive the ARM microcontroller. If I want to use one 10:1 transformer, I need at least 40 volts. The MCU isn't entirely necessary--a 555 to generate the AC signal and an op-amp, voltage divider, and transistor can be used to stop charging and indicate when the gun is ready to fire. I could use a ready-made booster-converter circuit board, but those have limited amperage output. I could drive directly from the battery, but to reach the target 461V, that's a 384:1 winding ratio. I'd either have to make a transformer or buy one. Neither are really doable. I could link two of my 10:1 transformers together for a step up of 100:1 | ||
+ | * **Pragmatic Solution** Just use more batteries for greater voltage. Bleh. Shitty. | ||
+ | * **Ideal Solution** Have a 300W, 384:1 transformer being fed directly from the bank of high-Amp MOSFETs. | ||
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