| 5V and 3.3V from USB port |
How to get 5 i 3.3 Volts from USB port. |
2.72 |
2,538 |
| Automatic emergency light |
Automatic emergency light with charger and automatic light switch. |
2.81 |
5,079 |
| Battery charge indicator |
LED based battery charge indicator. |
2.76 |
3,045 |
| Battery chargers |
Li-Ion, Ni-MH, Ni-Cd battery charger schematics and theory about charging them. |
2.79 |
3,376 |
| Car battery voltage indicator |
Car battery voltage indicator with LED. |
2.77 |
3,465 |
| Electronic fuse - DC filter |
Electronic fuse circuit, it can be used as DC filter (low pass filter). |
2.63 |
1,522 |
| High voltage power source for HeNe lasers |
Power inverter from 12V to 2,5kV for HeNe lasers. |
2.65 |
1,272 |
| Kirlian HV power source |
Kirlian HV power source. |
2.87 |
1,144 |
| Lead-acid accumulator charger |
A device that maintains specific voltage across lead acid battery by switching charger ON/OFF. |
2.68 |
4,901 |
| Li-Ion button cell battery charger |
Charges Li-Ion button cell batteries. |
2.76 |
1,468 |
| Linear power regulator |
Linear power regulator. |
2.71 |
2,703 |
| Mobile AT power supply |
Mobile AT power supply for car PC installation. |
2.72 |
2,129 |
| NiCd battery charger v1 |
NiCd battery charger schematics. |
2.72 |
1,552 |
| NiCd battery charger v2 |
Another NiCd battery charger. |
2.61 |
1,706 |
| PC AT power supply |
Schematics of PC AT power supply. |
2.74 |
1,650 |
