| This circuit may be used to replace the single current limiting resistor often found in dirt cheap battery chargers. The alternative shown h...
| This circuit may be used to replace the single current limiting resistor often found in dirt cheap battery chargers. The alternative shown h...
| Switched mode power supply units (SMPSUs) are popular but difficult to build oneself as well problematic when it comes to understanding thei...
| This circuit was designed to protect a computer monitor from overheating. It is recommended to attach this circuit to power users’ monitors!...
| Physicians and repair engineers often use small light pens for visual examination purposes. Rugged and expensive as these pens may be, their...