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Thanks for the fast replying I really appreciate it ...I already did what you suggested about trying different values ,because I thought from the first sight 10kR might be too much , then when I made it , the LED emitting was dim . so after some time I figured the optimum value for that resistor was 1k . more than 1k will cause dimming of the LED, lower than 470R will cause LED flickering or Fail of LED Emitting with some transistors , dont know why acully anyway the project was handy and fun to make, so here is my last version of it with SMD componentsand thanks again for the link , helped alot.
how to make a very simple NPN transistor tester
Thanks , I've been looking for this circuit for long time , I just started the Hobby so I hope u don't mind, Can you explain to me why we used this values of the resistors at those specific locations Thanks Again
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ty , Helped alot
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