The PC-Engine, also marketed under the name TurboGrafx-16 [1] is an 8-bit games console made by NEC/Hudson Soft which appeared in Japan in 1987. In terms of units sold, for some time it exce... Read more
Mention tube amplifiers and many designers go depressive instantly over the thought of a suitable output transformer. The part will be in the history books forever as esoteric, bulky and exp... Read more
The RF sweep frequency generator (‘wobbulator’) published in the October 2008 issue of Elektor has a receiver option that allows the instrument to be used as a direct-conversion receiver. Th... Read more
Software-defined radio (SDR) is all the rage. The idea is this: a very simple radio receiver is given topof- the-range performance with the aid of a little software. Even newer is SDVR (soft... Read more
Video fans and professionals in the field will find in this small signal distributor/amplifier an excellent ally when it’s necessary to distribute a single video signal across several equipm... Read more
This simple circuit indicates the amount of power that goes to a loudspeaker. The dual-colour LED shows green at an applied power level of about 1 watt. At 1.5 watts it glows orange and abov... Read more
Software decoding of remote control signals using the RC5 protocol does not present a significant challenge to a modern microcontroller, while for a pure hardware solution specialised RC5 de... Read more
Driving the ‘small’ motors that may be used in robotics doesn’t usually pose much of a problem. Servo motors actually have their own drive electronics, stepper motors can b... Read more
Voltages from various sources referred to the common ground are added in this circuit. The gain of the output can be controlled by selecting appropriate resistance values. If R1=R2=R3=R=2*Rf... Read more
In this circuit, Op-Amp operates in a closed loop. Input is applied to Non-Inverting terminal and output is fed-back to the Inverting terminal as a voltage shunt feed-back. The polarity of... Read more
