| This circuit is intended to give clear warning when it is time to replace the stylus in a record-player car-tridge. The unit indicates the `...
| This circuit is intended to give clear warning when it is time to replace the stylus in a record-player car-tridge. The unit indicates the `...
| When housewiring, the addition of an extra switch and light to an ex-isting circuit using the same power supply point would not normally cau...
| When housewiring, the addition of an extra switch and light to an ex-isting circuit using the same power supply point would not normally cau...
| A frequency range of 0.1 Hz to 999.9 kHz, a choice of CMOS or TTL output levels, and an accuracy/ stability which is limited only by that of...
| A frequency range of 0.1 Hz to 999.9 kHz, a choice of CMOS or TTL output levels, and an accuracy/ stability which is limited only by that of...
| The most notable feature of this circuit for an FSK modulator/de-modulator is its t: •• treme simpli-city: it requires only one supply volta...
| The most notable feature of this circuit for an FSK modulator/de-modulator is its t: •• treme simpli-city: it requires only one supply volta...
| The following simple circuit should prove a useful safety aid to motor-cyclists. In contrast to car drivers, motorcyclists generally only ha...
| If one wants to measure a voltage which is greater than the range (full-scale deflection) of a meter, there are two things which can be done...
| The growing awareness of the con-tributory role which stress plays in causing illness has led to increased interest in various forms of `aut...