Shared Projects by PeskyProducts

Test board for Sharp Memory LCD 128 x 128 pixel, 130 microAmp display.

Test board for very small 4 kHz piezo sounder.

Simple circuit using LCM555 timer for clock to operate SN54LV163A binary 1 - 7 counter which drives FFB3904 dual mosfets that control two rgb LEDs which, lastly, cause the owl’s eyes to glow with continuously varying color. Intended as a wearable pendant for little girls and daring men. Runs off of a 40 mAH LiPo. Added SMD switch for power on/off.

Simple Teensy 3.1 add-on board to test the relative performance of various state-of-the-art MEMS pressure sensors. Included is Invensense’s 3.5 mm x 3.5 mm ICM20730 7-axis motion sensor with accel/gyro and embedded pressure sensor, Bosch’s 2.5 mm x 2 mm BMP280, ST Microelectronics' 2.5 mm x 2.5 mm LPS25H, and Measurement Specialties' 3 mm x 3 mm MS5637. Broken out are all interrupts (ICM20730 and LPS25H) and all I2C device address bits (ICM20730, BMP280, and LPS25H) to avoid address conflicts. Also broken out is the ICM20730 FSYNC pin to test electronic image stabilization. Added bypass caps on ICM20730 VDD and VDDIO.

Redesign of the breakout board for ST Microelectronics' VL6180X proximity sensor for breadboarding with Teensy and Arduino. VIN is between 3 and 5.5 V. Sensor uses time of flight to detect absolute distances independent of surface reflectance up to 25 cm away. Can be used to recognize hand gestures for sophisticated touchless micro-controlling. Small package, low cost, and low power usage makes integrating into existing projects, or use as a Teensy 3.1 or Arduino Pro Mini add-on board very attractive. In fact, VIN and GND can be supplied via Teensy GPIO pins by digitalWrite(HIGH) and digitalWrite(LOW) since total current draw is always less than 25 mA for this sensor. Replaced voltage regulator with TI TLV70728, reduced size of passives to 0402, and significantly improved layout.