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Profile for PeskyProducts
Shared projects
Electronic Owl.V01y
by
PeskyProducts.
2
layer board of
0.56x0.56
inches
(14.22x14.22
mm).
Shared on
April 24th, 2015 06:44.
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. Corrected package error.
H3LIS331D.v01x
by
PeskyProducts.
2
layer board of
0.51x0.31
inches
(12.83x7.75
mm).
Shared on
April 18th, 2015 06:07.
Small breakout board for ST Microelectronics' high-G H3LIS331D accelerometer. Improved layout slightly.
M41T62RTC+BMP280+M2402DFC+HTS221.v01z
by
PeskyProducts.
2
layer board of
0.71x0.31
inches
(17.91x7.75
mm).
Shared on
April 13th, 2015 03:37.
ST Microelectronic’s ultra-low-power real time clock coupled with Bosch’s BMP280 pressure and temperature sensor and ST’s M2402DFC 2Mbit EEPROM in an appallingly small add-on board for Teensy 3.1. Power is supplied via digital write to general GPIO pins since the total power requirement never exceeds 2 mA. Communication is via I2C and there are 4K7 pullup resistors on board. The temperature sensor allows the Teensy 3.1 microcontroller to make periodic calibration updates to the RTC calibration register so the clock remains temperature compensated for maximum (~2 ppm or 1 minute a year) accuracy. The clock outputs the usual date, days, hours, minutes, etc. but also outputs tenths of seconds as well as hundredths of a second.The on-board EEPROM is useful for data logging and storing alarm patterns (music) for output to a small speaker. With 2 Mbits (256 kBytes), lots of data can be logged and dozens of alarm sounds can be stored; one for every occasion! Added Taiyo Yuden PAS3225 2.6V 14 mF super capacitor and Comchip low forward voltage Schottky diode to provide power to the RTC time keeper even when disconnected from the microcontroller. The PAS3225 5 microAhour super cap can run the RTC (which needs ~330 nA at 2.6 V) for about 18 hours. Added ST Microelectronics' HTS221 16-bit, ultra-low-power relative humidity sensor. The board is now a tiny weather logging station: pressure, temperature, and humidity can be logged once per minute for 15 days!
H3LIS331D.v01
by
PeskyProducts.
2
layer board of
0.51x0.31
inches
(12.90x7.87
mm).
Shared on
April 6th, 2015 17:21.
Small breakout board for ST Microelectronics' high-G H3LIS331D accelerometer.
BNO055+BMP280BreakoutBoard.v02
by
PeskyProducts.
2
layer board of
0.71x0.51
inches
(17.91x12.83
mm).
Shared on
April 5th, 2015 03:55.
Bosch’s new BNO-055 9-axis motion sensor plus BMP280 pressure sensor. The BNO-055 has an embedded Cortex M0 ARM processor as well as accel/gyro and mag for a purely hardware absolute orientation solution. This is either a mini Teensy 3.1 shield or a conventional breakout board, choice is made via solder pads on back which bring 3V3 and GND out to edge pins. Sensor can be accessed either via I2C, UART, or HID-I2C on Windows 8 by changing solder pads PS0 and PS1 on back. Lastly, BNO-055 I2C address LSB can be changed via solder pad ADO so two can be on the same circuit, if desired.