Newbie Question of Resistance

[audioguru]

A transistor with a certain part number can be very sensitive and turn on with a low base current but another transistor with the same part number and made by the same company could be weak and not sensitive so it needs the amount of base current that is shown on its datasheet: 1/10th the collector current.

If you make every circuit use a base current 1/10th the collector current then all your circuits will work, not just the ones that have very sensitive transistors. Maybe you won't have any very sensitive transistors.

 

[giftiger_wunsch]

R2 is in the wrong place, it needs to be in the collector, the emitter should go directly to the battery.

Indeed, the schematic I suggested had the same problem, as well as the base current having to flow through the LEDs as well which probably wouldn't have been possible; hadn't considered that.

Never mind, after moving the resistor your schematic should be fine JEB. (Better than my hastily-constructed one )