| Making heatsink calculations has always been a bit of a nuisance. This sample spreadsheet makes life easier. Its main advantage is that you...
K. Walraven (99)
| Nowadays you can buy white LEDs, which emit quite a bit of light. They are so bright that you shouldn’t look directly at them. They are stil...
| Elsewhere in this issue, an RC oscillator is used as a baud rate generator. If you can calibrate the frequency of such a circuit sufficientl...
| It’s always a bit difficult to measure the current in the positive lead of a power supply, such as a battery charger. Fortunately, special I...
| We all complain occasionally about Microsoft, but the advantage of their monopoly position is that everyone has the same programs. As a resu...
| Many circuits can be powered directly from the mains with the aid of a series capacitor (C1). The disadvantage of this approach is that usua...
| You can do all sorts of neat things with Excel, such as computing the nearest E12 value. Select the cell under ‘Input’ and enter the value t...
| Although surface-mounted devices (SMDs) have been a fact of life for a while already, even in DIY electronics, many hobbyists are still relu...
| This is a DIY version of a device that can be found in various forms in the clinics of physiotherapists and massage institutes. It produces...
| We can assume that the majority of our readers have sufficiently mastered the noble art of soldering. However, the art of unsoldering alread...