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Showing results for tags 'transistor'.
I've just started playing around with my msp430 ez-2013 that my uncle gave me a while back (I've been too busy with school and whatnot until now ) and am trying to use the ez-2013 to control a transistor that will flash an externally powered LED. So far I've had no luck with it. I'm using a 2n222 transistor with a 10k ohm resistor from P1.0 on the ez-2013 to the base and a 10k ohm resistor on the emitter, with the anode of the LED attatched to the collector and the cathode attached to +6V. The resistor on the emitter is attached to ground. The led is powered seperately from the microcontrol
I'm trying to drive an NTE108 (BJT NPN) with an output pin on my MSP430G2553 and having trouble. The output (P2.4) of the MSP is connected to the base of the BJT through a 330 resistor and controlled via software on the MSP. I've attached a picture of the schematic (R1 is a recent addition). Pin P2.4 works as expected when connected to the LaunchPad. It can drive an LED and works when floating. I cannot test it with the BJT (NTE108) because I only have one and it is soldered down. I have moved the MSP over to a protoboard where it is supplied with a 3V regulator that can do 250mA.