Field-strength meter

Field-strength meter: The unit discussed here indicates, by means of a chain of LEDs, in logarithmetic ratios the strength of an electric field surrounding the unit. The inputs signal across the conducting discs is applied to the non-inverting input of IC1. The amplification of IC1, A = R4/P1. In the prototype, P1 was set at[…]

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CGA-SCART adaptor

The adaptor has the great advantages of not needing a separate power supply and requiring so few external components that these can easily be accommodated in the SCART connector. The signals on the R, G, and B pins of the CGA card are converted from TTL level to SCAM’ level with the aid of transistors[…]

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