Hyperball
Williams, 1981You're currently viewing posts by Pinsider homepin.
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The key point to remember is that ANY LED will require a current limiting resistor in series with any power you connect to it or it will fry in micro seconds.
Exact value is determined by the voltage applied and the circuit in which it is used BUT a rule of thumb that is good enough for a quick bench test is 220R for 5V and 1K2 for 12V.
A 1/4 watt resistor will be adequate for most tests.
Testing the RX transistor is a little more complex as stated but they are usually quite reliable.
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