Shared Projects by PeskyProducts

Nordic Semiconductor’s low-power 2.4 GHz RF radio with pcb antenna and matching circuit per Nordic’s spec. Using much smaller XRCHA16MHz Murata crystal to reduce cost and board size. Added solder jumpers on back to allow 3V3 and GND to be taken from board edge to make breadboard friendly.

D203S PIR signal processed by BISS0001 active only when photoresistor detects dark ambient conditions. PIR detection triggers 2600 mcd white led with 160 degree illumination for a time settable by a Murata potentiometer. Slide switch chooses between retrigger modes. In addition to the usual motion-activated illumination, the trigger signal from the BISS0001 is pinned out to the side of the board so other actions can be triggered such as camera control, relays, etc. Intended to be attached to a 9V battery for a compact motion controlled solution with the TI TPS714XX voltage regulator providing either 3V3 (here) or 5 V depending on the application.

Simple breakout board for the ESP8266 chip to provide wifi capability to the Teensy 3.1. Designed to take power from VIN via USB or LiPo battery and convert to 3V3 with a TLV7333 300 mA voltage regulator. Also on board is a Macronix 4 Mbit MX254006E SPI Flash memory chip. Small rgb led indicates power on, pcb antenna matched to 2.4 GHz. Can use either 26 or 40 MHz Seiko Epson crystal. The board has the same eight pins as the cheap Chinese modules as a first cut to see how hard it is to add wifi to Teensy 3.1 projects. The board is designed to solder directly on top of the Teensy just above the USB plug. Added led on TX, broke out five more GPIO pins including SPI port.

Small (1 square cm) wearable breakout for the BNO055 9-axis motion sensor with embedded Cortex M0 processor for hardware sensor fusion of the data. This board is hardwired for I2C, with one of two I2C addresses chosen by ADO. The interrupt is broken out for threshold, tap, and freefall detection, etc.

TI’s TMP007 is an IR Thermopile sensor which measures the temperature of an object without contacting the object. Board designed as a Teensy 3.x add-on where power and ground are provided by digitalWrite(HIGH/LOW) from Teensy GPIO pins due to very low-current (270 microAmps) operation. Interesting design challenge since the sensor is very sensitive to thermal noise so pains have to be taken to thermally isolate the tiny BGA sensor. Sensor has an alert (interrupt) function as well as one of the two address pins broken out here so two of these can be on the same I2C bus.