I have a circuit diagram for a physics experiment. On the diagram I have represented a variable DC supply, but I would like to know where do I write the potential difference selected on the variable DC supply.
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1\$\begingroup\$ Just write it as a note next to the item. \$\endgroup\$– Andy akaCommented Sep 27, 2018 at 17:51
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\$\begingroup\$ Generally, I draw it as a single-cell battery with a pointed arrow drawn through the cell symbol at 45 degree angle: arrow is pointing to top right. In fact, exactly as in the answer shown by Transistor below. \$\endgroup\$– Dwayne ReidCommented Sep 27, 2018 at 19:24
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2 Answers
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simulate this circuit – Schematic created using CircuitLab
Figure 1. Adjustable voltage annotation.
There isn't a standard. Either of the above should make it clear to the reader.
If you can define your own symbols you can draw a diagonal arrow (pointing north-east) through the symbol to indicate that it's adjustable.
answered Sep 27, 2018 at 18:48
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Normally spec; in footnotes
Vin =Min:Max @ Iin: surge, max.
Vout=Min:Max @ Iout: Peak, max or load regulation error
V dropout or Vin-Vout : depends on buck-boost, buck, or boost or LDO and efficiency
( which may imply Pd max, efficiency and temp rise or cooling requirements.)
More info the better so no one has to guess why their "plasma arc generator" craps out the supply or load regulation error causes measurement errors or Notes to add decoupling caps at load to improve transient attenuation @ x Amp step load .....get it?
Or SIMPLY; Vadj= X to Y Volts @ Z watts or TBD Amps.
Then refer to Spec document xyz for PSU specs.
