Design of a low cost power supply kit without SMD components.
| Quanity | Component | Description |
| 3 | C4, C11, C13 | 1nF 2.5mm |
| 9 | C1, C2, C5, C6, C7, C8, C10, C12, C14 | 100nF 2.5mm |
| 3 | C15, C17, C18 | 100pF 2.5mm |
| 1 | C16 | 100µF / 35V |
| 1 | C9 | 220µF / 35V low ESR |
| 1 | D3 | Zener diode 12V 0.5W |
| 1 | IC2 | ATMega8-16 |
| 1 | IC1 | 7805 |
| 3 | T14, T16, T17 | BC547C |
| 1 | T15 | TIP142 |
| 1 | IC3 | LM324 |
| 6 | T7, T8, T10, T11, T12, T13 | BC557C |
| 1 | R22 | 0.1R 2W |
| 8 | R4, R6, R15, R16, R17, R20, R25, R30 | 1k 1% 0.25W |
| 1 | R29 | 1k5 1% 0.25W |
| 1 | R23 | 2k 1% 0.25W |
| 1 | R14 | 7k5 1% 0.25W |
| 7 | R2, R19, R21, R24, R26, R27, R28 | 10k 1% 0.25W |
| 1 | R11 | 10R 1% 0.25W |
| 1 | R18 | 20k 1% 0.25W |
| 1 | R31 | 200k 1% 0.25W |
| 7 | R5, R7, R8, R9, R10, R12, R13 | 300R 1% 0.25W |
| Quanity | Description |
| 2 | LED display (common cathode) |
| 1 | Print 50x100mm, 2 layer |
| 2 | Potentiometer 1k |
Higher efficiency at low output voltage.
| Quanity | Component | Description |
| 1 | C3 | 220µF / 35V low ESR |
| 2 | T1, T3 | BC547C |
| 1 | T2 | BC557C |
| 1 | R1 | 1k 1% 0.25W |
| 1 | R3 | 2k 1% 0.25W |
| 1 | T4 | IRF5305 |
| 1 | D1 | SB360 |
| 1 | L1 | 47µH 2,5A |
Provides a higher output voltage of 24V .. 30V.
| Quanity | Component | Description |
| 1 | T9 | BC547C |
| 1 | T6 | BC557C |
| 1 | T5 | IRLZ34N |
| 1 | D2 | SB360 |
I do not sell any kit or PCB.
