billm
Newbie
I have a SMD SOT23-6 chip marked 002K. This IC is in a relatively simple circuit powered by a 3Volt watch battery. It somehow senses motion then drives 5 Led's when motion is detected then holds the Led's on until no motion detected for a few minutes then shuts them off. I do not have any great way of taking a close up picture of it as I would need a microscope camera setup. Pin 2 = - battery, pin 5 =+3Volts . Led's are grounded and the output pin 3 drives the anodes via 220 ohm series resistors to each one. Pin 4 has a series 3.6K ohm resistor to a large SMD device that looks like a cap but may be the motion sensor device. The other lead of that device goes directly to pin 6 which also has a 4.7 meg ohm resistor to +3 volts. From pin 1 there is a 1K ohm resistor to a very long trace which appears it may be being used as an antenna as there is 3.2 M ohm impedance from the non pin 1 side of the 1K ohm resistor to gnd ( pin 2 ). The other end of this long trace is not terminated. Any help anyone can provide would be great. The 002K markings are laser branded beginning right above the pin 1 designation dot pretty much centered on the chip package. No other markings.How can I detrmine what this chip is I have spent HOURS looking for a circuit like this on line to no avail.
Thanks in advance Billm
Thanks in advance Billm