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How to Build a Bicycle Generator
Constant Current Source with Operational Amplifier
I guess I'm a little late to the party, but:The sentence: "Connect a load of your choosing with a resistance of less than 1.4 k to the emitter terminal of the transistor (the nonconnected terminal) and to ground as shown in the circuit diagram." misstates the transistor terminal as being the emitter, when in fact it is the collector. The choice of the op amp is not arbitrary, since the inverting input is held near the V+ rail and for many op amps (esp. older ones) the rails are off limits and can result in destruction at worst and invalid operation at best.
abemckay, Great project, but wondering about that Large Ring Gear, did you make it? Or where did you source it? Thnks!
Can it be mobile? So that we can move around the city while we charge phones, computers, etc. ...
This is a great, comprehensive guide! I'm wondering a couple things though: 1. Can you build this without a battery, so that it would only charge when pedaling?2. If we were to create multiple pedal->motor systems, could we connect them to the same charger/balancer?3. If we were going to split or change the current (in order to adjust the charging speed), could we do that between the charger and inverter? or maybe after the inverter?Any guidance is appreciated; I'm still learning a lot about electronics!
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