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| One resistor | Use the same resistor to charge and discharge a capacitor |
| Two resistors | Use one resistor for charging and another resistor for discharging a capacitor |
| Combined resistor | One resistor is used for both charging and discharging, the other only for charging |
| 555 oscillator | The classic 555 oscillator circuit |
| 555 timer | The classis 555 timer circuit |
| Threshold | Select between specifying the threshold in absolute volts or in percents of the charge voltage |
| Uchg/dis | The voltages use to charge and discharge the capacitor, Uchg is usual the supply voltage and Udis is usual 0 volt |
| Threshold | The level where the oscillator switch between charge and discharge |
| R or Rchg/dis | The resistor(s) used to charge/discharge the capacitor |
| C | The capacitor used |
| Time | Charge/discharge time when designing a circuit |
| Oscilloscope | Shows waveforms from different parts of the circuit |
| R Rchg, Rdis | Calculated resistors |
| Time | Time for charge/discharge or total time |
| Charge added/removed | Charge added or removed when charging/discharging |
| Max. current | Maximum current in resistor/capacitor during charge/discharge |
| Min. current | Minimum current in resistor/capacitor during charge/discharge |
| Tau | The product of R and C |
| Frequence | Oscillating frequence |
| Duty cycle | Duty cycle of oscillation |