Abstract: For capacitance coupled keyboard data entry means, a key switch, synchronous circuitry and phase detector in combination to yield a unique encoder output signal for a keyboard matrix. Capacitance coupling is effected prior to full key switch travel, that is, coupling actuation prior to full key downtravel and deactuation subsequent to manual key switch release, said key switch having a floating electrical coupling plate inhibited from dropping to a printed circuit board by a fixably positioned magnet. Coupling actuation providing mechanical hysterisis is effected upon key depression by a spring forcing said plate from the magnet and deactuation is effected by the magnet retracting said plate. An analog multiplexer, in synchronization with an encoder are driven by clock counter means to scan the keyboard matrix. The counter further provides distinct high frequency pulse bursts to an actuated coupled connection.