| As more and more audiovisual equipment is cheerfully stacked up in your living room, connecting it all is bound to become a problem sooner...
T. Giffard (46)
| Building arecord player, cassette or tape recorder, or compact-disk player, is often hampered by the mechanical construction and the avail...
| The diagram shows how the four gates contained in a 4077 may be used to build a circuit that doubles the frequency of a signal applied to...
| The voltage amplifier and current amplifier are housed on separate printed-circuit boards. The current-amplifier board is fitted just abo...
| The power amplifier presented is a revamped version of the LFA-150 we published in late 1988. It provides rather less power than its popul...
| The compact test probe is made from five transistors, three LEDs, a zener diode, and three resistors. It enables rapid 'measurement' of vo...
| The network provides an attenuation between 0 dB and 78.75 dB that is presettable in 64 steps with the aid of a 6-bit code.
| This month we present an experimental circuit to demonstrate that visible light can be modulated and used as a carrier to convey informati...
| The basic function of a pick-up element is to translate the motion of the stylus into an electrical signal. The most popular cartridges in...
| Although the analogue record player (as it is now olten called) was written off by many some years ago, well-known manufacturers like Thor...