| This circuit is intended to display any desired character on an oscillo-scope screen. The character is pro-duced by erasing certain dots in...
| This circuit is intended to display any desired character on an oscillo-scope screen. The character is pro-duced by erasing certain dots in...
| This circuit is intended to display any desired character on an oscillo-scope screen. The character is pro-duced by erasing certain dots in...
| This circuit for a frequency meter offers six ranges: 100 Hz, 1 kHz, 10 kHz, 100 kHz, 1 MHz and 10 MHz. Switching between ranges is per-for...
| Recharging lead-acid batteries is often assumed to be an extremely straightforward matter. And that is indeed the case, assuming that no spe...
| Recharging lead-acid batteries is often assumed to be an extremely straightforward matter. And that is indeed the case, assuming that no spe...
| When we first published a circuit in last year`s Summer Circuits issue which was designed to `kill` the sound of a DJ`s voice between recor...
| Herzschlag-Monitor digital (Ohrläppchen)
| When considering constructing a `wireless` headphones system, three basic approaches present themselves: a `genuine` r.f. transmitter and re...
| When considering constructing a `wireless` headphones system, three basic approaches present themselves: a `genuine` r.f. transmitter and re...