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6-layer stack confirmation
Afternoon,   I've been back and forth with various PCB manufacturers this week regarding their 'standard' 6-layer configurations. The following diagram represents the...
Sunday, 30 June 2019 - 03:49
MCU ADC input when MCU powered down
Morning,   I have an external battery which is permanently connected to my device. I have a basic A/D circuit to read the voltage of the battery (current limiting resistor...
Sunday, 23 June 2019 - 23:20
ATSAME70Q21 Dual Serial 2-Wire within QSPI
G'day,   I'm looking to interface 2 16-bit 16 channel 1Msps ADCs with an ATSAME70Q21 and am having some issues determining how best to design their interface. Each ADC has...
Sunday, 28 April 2019 - 00:28
16-channel 12V PWM output circuit
I currently have a PCA9685 LED driver IC, which offers 16 channels of individual PWM control but with only 10mA source capability. I would like to control 16 12V outputs, each at...
Saturday, 9 March 2019 - 07:15
Voltage divider for PMIC enable input
G'day,   I'm overlooking something really simple, and figured some fresh eyes will make short work of this issue!   I've just assembled the first prototype of my...
Thursday, 7 March 2019 - 21:03
Parallel analogue traces and return paths
G'day,   My PCB makes use of an 8-channel DAC, the 8 outputs of which terminate at a 2x4 2.54mm pitch through hole header. I've attached a screenshot of the DAC circuit and...
Wednesday, 7 November 2018 - 00:08
Considerations when sizing (physical) SMD/SMT capacitors
G'day,   I've recently finished the schematics for my ~900 component device. I have primarily used 0805 capacitors as a starting point, as I'll be assembling the board...
Thursday, 27 September 2018 - 21:54
MCU Power Enable IC with Delay Timer
Good evening,   I'm after a pretty straight forward functionality, but I'm struggling to find a suitable IC.   My circuit is permanently connected to an automotive...
Sunday, 2 September 2018 - 11:38
Ethernet socket communication with SAME70
Morning all,   I would like to implement an ethernet-based socket communication function between my ATSAME70Q21 (on the Xplained evaluation board for the time being) and an...
Wednesday, 27 June 2018 - 22:14
Progression from XPLAINED board to production
Afternoon all,   I've recently received my ATSAME70 Xplained board, and am about to start developing, with the intention of incorporating the ATSAME70Q21 MCU into my embedded...
Tuesday, 19 June 2018 - 02:29
Switchable pullup resistor for analogue inputs
Afternoon all,   Following my previous topic, I'm looking for some input on an element of my data acquisition design. My 32 analogue inputs will be interfaced with 2 16-...
Thursday, 14 June 2018 - 02:07
Data acquisition microcontroller recommendation
Evening all,   First post on this site, which seems about right, as I'm also very new to microcontrollers.   I'm currently prototyping a data acquisition product, which...
Thursday, 7 June 2018 - 11:33