OSH Park
Profile for sjm
Shared projects
Raspberry Pi FPGA HAT
by
sjm.
2
layer board of
2.57x2.21
inches
(65.23x56.21
mm).
Shared on
July 13th, 2015 08:55.
Altera Cyclone III plugged in to a Raspberry Pi.
Independent power supplies, config PROM, I2C EEPROM, serial console. Entire Raspberry Pi bus is available to the FPGA.
FPGA ethernet interface
by
sjm.
2
layer board of
0.78x0.84
inches
(19.71x21.21
mm).
Shared on
May 8th, 2015 09:49.
10BaseT interface using discrete differential drivers and receivers.
DR128 Analog Data Acquisition
by
sjm.
2
layer board of
1.78x2.14
inches
(45.26x54.28
mm).
Shared on
April 30th, 2015 10:52.
24 bit ADC, TI ADS1274
4 differential input channels (+/- 10V)
Simultaneous sampling on all channels up to 128k
Full schematics, and VHDL source code available here: http://stevenmerrifield.com/datarec.html
Raspberry Pi ADC HAT
by
sjm.
2
layer board of
2.57x2.21
inches
(65.23x56.21
mm).
Shared on
April 26th, 2015 02:50.
24 bit ADC, TI ADS1258
16 channels, 125k sps.
Includes an extra 8 GPIO, I2C EEPROM and serial console. On board regulators for digital and analog supplies. Main parts: ADS1258, LTC6655, 24LC32A.
PIC power supply
by
sjm.
2
layer board of
1.98x1.43
inches
(50.22x36.22
mm).
Shared on
April 26th, 2015 01:23.
PIC micro controlling a multi-channel, 24 bit ADC, displaying voltage and current on an LCD. As used in my dual channel power supply: http://stevenmerrifield.com/powersupply/index.html