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Power supply



As the power supply device, the switching power supply with AC100V input voltage, DC12V output voltage and the 1A output current was used.
Although I can make the stabilised power supply with myself, the ready-made articles were purchased because I wanted to make the compact power supply without using a large power supply transformer.
As the power supply device LB10B made of COSEL company is used.


The consumption current of every device is as follows approximately.

DeviceConsumption current
TV tuner300mA or less
PLL oscillator100mA or less
Frequency dividerSeveral mA
Digital clock main board200mA or less
Digital second indicator200mA or less
Battery chargingSeveral mA