There are many schemes on inexpensive hardware components. Power supplies, converters and all that.
1. Scheme charger rechargeable flashlight (dangerous for the battery)
2. The voltage regulator on FRI
3. The constant current sources
4. The current source
5. A voltage regulator
6. The current source
7. A bipolar current source
8. The constant current sources
9. Charger
10. A voltage Converter
11. Very good charger
12. The option of replacing the high-voltage Zener diode
13. A simple indicator of radiation hazard
14. Charger
15. A voltage Converter
16. The constant current source
17. The analogue of the Zener diode
18. A voltage regulator with current limiting - current source
19. A voltage regulator for battery charger solar battery
20.Compensation of fluctuations in the power supply
21. The charger is powered by free energy
22. The voltage regulator on the logical element
23. A simple constant current source
24. Switching regulator condenser BP
25. Transformerless power source hours on the optocouplers
26. Structural diagram of the capacitor voltage Converter with a multiplying current
27.Capacitive voltage Converter
28.The current source integrated Zener diode
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