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Phantasia on a 555 Theme

The 555 timer chip is older than many Elektor readers and has been used in numerous configurations. The suggestion presented here has not been seen elsewhere by the author and has some interesting features.The configuration for which the device was designed is the well-known ‘RA-RB-C’ one that uses the internal discharge transistor to discharge the capacitor once it has reached 2/3rd of the supply voltage, see Figure 1.
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