Simple TTL Power Supply (CB1161E)

    We found this circuit in an English publication of 1976. It can be easily assembled by changing the components as we made. With it we can get 5 V with a current up to 100 mA for TTL logic power supply. The voltage input can be between 8 and 20 V and does not need to be regulated. R2 and R3 determine the accuracy of the 5 V output. The power transistor must be mounted on a heatsink.





Circuit Bench