Electronics > Projects, Designs, and Technical Stuff

Computer controlled logic outputs

(1/1)

HKJ:


After making the solid state relay and exaggerate a bit on the software, I could see that a box with logic outputs running the same software could be very useful.

Functions:

* Can turn on/off any of the 3 outputs from a command or from buttons on the box.
* Can generate PWM with a frequency from 1Hz to 100kHz on up to 3 channels
* Can generate push pull PWM with dead time on one channel using output 1 and 2.
* PWM frequency can be specified either as frequency or period time.
* PWM duty cycle can be specified either as percent or as high time.
* PWM has a resolution up to 0.1%
* Frequency can be specified with on decimal
* PWM duty cycle can be specified with on decimal
* Time is specified default in milliseconds with two decimals, some other time units can be selected by a letter after the value.
* Timed commands works up to 10 hours
* Time specifications below 4 seconds uses hardware timers with available resolution down to 10us
* Time specifications above 4 seconds uses software timing with 10ms resolution.
* Output 1 & 2 are synchronized, output 3 can be up to 1us late.
* Can sequence the outputs, either with pulse length or when they turn on.
* Commands can be stored in the device and activated with a button for off-line usage.
* Outputs can work at either 3.3V or 5V logic levels.
* Can deliver pulses below 1us in PWM mode.Full project here, including schematic, software and gerber files:
http://lygte-info.dk/project/LogicOutputs%20UK.html

MarkF:
Don't multi-post.  The group frowns upon it.

Original:
   https://www.eevblog.com/forum/projects/computer-controlled-solid-state-relay/msg2360859/#msg2360859

HKJ:

--- Quote from: MarkF on May 13, 2019, 01:16:59 pm ---Don't multi-post.  The group frowns upon it.

Original:
   https://www.eevblog.com/forum/projects/computer-controlled-solid-state-relay/msg2360859/#msg2360859

--- End quote ---

I did not, this is another project. The first one is with high current mos transistors for output, this one is with logic level output. This means different PCBs, but the software is the same.

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