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Profile for PeskyProducts
Shared projects
TCA9548A.v01y
by
PeskyProducts.
2
layer board of
0.61x0.61
inches
(15.39x15.39
mm).
Shared on
August 31st, 2015 08:47.
Added A0 solder jumper to TCA9548A I2C multiplexer board.
M41T62RTC.EnvironmentalDataLogger.v04a
by
PeskyProducts.
2
layer board of
0.71x0.31
inches
(17.91x7.75
mm).
Shared on
August 31st, 2015 06:18.
ST Microelectronic’s ultra-low-power real time clock coupled with Bosch’s BME280 pressure, humidity, 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. The board is now a tiny weather logging station: pressure, temperature, and humidity can be logged once per minute for 15 days! IRQ pullup on the host side.
nRF51822CFAC.v01
by
PeskyProducts.
4
layer board of
0.63x0.50
inches
(15.90x12.70
mm).
Shared on
August 29th, 2015 04:49.
Test board for nRF51822 CFAC.
DRV8837.BrushedMotorDriver.V02
by
PeskyProducts.
2
layer board of
0.71x0.81
inches
(17.93x20.47
mm).
Shared on
June 24th, 2015 20:30.
Simple DC brushed motor driver using TI’s DRV8837 1.8 A PWM-controlled H-Bridges. Board is designed to be mounted onto a Teensy 3.X although it can also be used on a breadboard. The H-bridges allow the motors to be driven both forward and reverse, with braking and coasting options as well. SLEEP pin HIGH enables the motors. Added zero resistor jumper to connect VM and VCC and added GND vias.
TB67B0008.v03
by
PeskyProducts.
2
layer board of
0.71x0.51
inches
(17.91x12.83
mm).
Shared on
June 19th, 2015 16:51.
Test board for Toshiba’s BLDC motor controller. Added GND vias, moved caps slightly. Added GND vias on EPAD.