thanks to the help from KMoffett. i have had this working on and off a breadboard (initial mock up). i was going to try and work a motion sensor into the circuit so i re-breadboarded the circuit.
after setting up the circuit this am on the
learning lab. it straight up did not work. checking the voltage supplies on the lab i was getting nothing. i pulled the batteries (6 aa). individually they showed 1.3v. i went to put them back in and realized that 3 of the spring terminals were shorter than the others. further examination showed that the bases around the springs had melted. i don't believe it was this morning that it happened. last week i was working on a different circuit on the lab and was not getting the responses i was expecting. i think this is when i must have shorted something to cause this.
i left circuit on the lab. i left out the 6 aa batteries and jumpered the BT51cell phone battery i have been using directly to the circuit on the lab. the circuit is active when i connect the battery, to the point where the vibrator comes on and stays on.
i did some troubleshooting but i am also wondering if the breadboard itself can be compromised from the assumed pre mentioned short incident.
troubleshooting
remove power supply to VIN jumper completely and the vibrator speeds up.
remove the 470 resistor completely and the vibrator stops.
remove the 10k resistor completely and no change, the vibrator continues.
remove the diode completely and no change, the vibrator continues.
voltages with complete circuit
supply voltage 4.19v
vin 4.19v
out 2.84v
e 4.19v
b 3.61v
c 3.97v
voltages with vibrator removed from circuit
supply voltage 4.18v
vin 4.18v
out 3.38v
e 4.18v
b 3.55v
c 1.35v
any thoughts?