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HI all,
Previously, I have store my lithium ion in chamber for 3 months. Then, i checked the internal resistance of the batteries. However the result is "no change", I think that's something wrong with the measurement system. However, I have to redo the test again. So, I wish to know more...
Re: YOYO with LED light
I wish to get very simple circuit which the LED in the YO-YO can flicker or just light ON when the YOYO is spinning. NO too much complicated.
Re: YOYO with LED light
As we all know, the YO-YO is swing when a player playing the YOYO. However, in market, the company like **broken link removed** using the swing/ dynamo theory to make a/ some LED light. So, now i have a project to make a sample of this type pf YOYO, can some one please...
Hi all,
currently, i have a project to make a YO-YO (spin) with LED light? Have anyone can share me the circuit and the theory about it? Thank you very much.
Hi all,
Currently, I'm study about resonator. However, I still can;t get the basic or how the resonator function. Anyone, please share me the knowledge of ceramic resonator and what's the different between ceramic resonator and crystal clock? Thanks.
Thanks. I'm trying using thermocouple to measure the IC surface temperature when the IC is operating.
However, the question here is how i put the thermocouple on the surface of IC? Using Aluminum tape or any epoxy to stable the probe of thermocouple? Any opinion? Thanks.
Understand, however, i re modified the equation and become E = I (R+r).
where E = Voltage without load; I= current with load; R = load; r = internal resistance. Right?
However, in practicing, the value of I*R > value E, is this valid?
I'm using 27 ohm as load, the E = 4.974 V (measurement by...
Yes, you are right. I just use the capacitor (2 capacitor in parallel) to start a simple motor. However, from the graph(experiment); we will find that when the internal resistance of power supply increasing to certain level, the result will not parallel.
So, my thinking is when the internal...
Currently, I have some design problem.
Analog design, power supply. 1 of the important component in power supply is capacitor. So, as we all know, capacitors have at least 2 basic functions, store charge and filtering the noise (particular frequency). Capacitors have different capacitance...
Thank you very much.
By the way, what's the meaning of "power supply efficiency"? It's same as transformer efficiency or power loss? How to calculate the power supply efficiency?
Currently, I'm doing some research about the PC power supply performance in market. I wish to know some of the specification of PC power supply from different manufacturer, like the efficiency, the internal resistance, the ripple and other parameters.
Please give some advice, where can i get...
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