Author Topic: Computer controlled solid state relay  (Read 608 times)

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Offline HKJTopic starter

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Computer controlled solid state relay
« on: April 22, 2019, 04:54:35 pm »



Sometimes I do other stuff than reviews, this is a piece of test equipment.

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 handle 10A continuous and much more in peak.
  • Can deliver pulses below 1us in PWM mode
.

Full project here, including schematic, software and gerber files:

Computer controlled solid state relay

 
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