At a higher input voltage Vin the output voltage Vout = 5 V remains stable...
Circuit diagram voltage regulation with 7805 with input voltage Vout = 18 Volt. |
Circuit voltage regulation with 7805 with input voltage Vout = 18 Volt. (Enlarge) |
In fact, the maximum input voltage Vin = 35 Volt.
Also under a higher load the output voltage remains stable ...
Circuit diagram voltage regulation with 7805 with a larger load. |
Voltage regulation circuit with 7805 with a larger load. (Enlarge) |
If you push the pushbutton switch S1, the output voltage remains almost stable (assuming the battery is not exhausted).
With a closed S1, a current of 0.5 A flows through the load resistor, which corresponds to a load of 2.5 Watt!
In fact, the maximum current Imax = 1 A.
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Caution Push the push-button switch S1 only briefly. The load resistor and voltage regulator are quickly heating up! You come back to this in the Experiment 7. |
In the next step, you expand the circuit with smoothing capacitors...
