I am new to 555 Timers and Proteus and I need help to fix a circuit I have built. The intended function of the circuit is as follows.
- The logic is controlled by an external circuit but it is represented by logic toggles within this circuit to purely test the 555 Timer functionality. -The logic toggles will be user controlled in this circuit and they control which 555 timer must be turned on using logic 1.
- Only one 555 timer must function at any time as each 555 timer output has been configured with the use of resistors and capacitors to roughly drive the motor (depicted as a lamp) at respective speeds. - The speeds configured by U1, U2 and U5 should roughly be 80V, 150V and 220V. For example, if U1 is toggled on by logic 1, the motor must be driven at 80V.
- I calculated the resistances and capacitance to produced the desired speeds and rounded them up to the nearest whole number for ease of building. I am however unsure if I calculated them correctly.
I have tried simulating in Proteus but I got the following errors which I cannot solve.
I would appreciate if anyone can kindly assist in determining the problem and perhaps provide a solution.