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STD Linear Some 3904
Mode: Editors' pick
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Update time：
2022-01-19 00:25:05
Creation time：
2016-11-08 23:58:55
Description
Try to get linear voltaje control using PWM and 2N3904.
Kind of excercise.
Design Drawing
schematic diagram
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PCB
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WaveForm
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1-Amp ripple
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10 PERCENT DUTY
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90% DC new design
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| ID | Name | Designator | Footprint | Quantity |
|---|---|---|---|---|
| 1 | 1uF | C1,C3 | C1 | 2 |
| 2 | 5uF | C2 | C1 | 1 |
| 3 | TRANSISTOR_NPN2N3904 | Q1 | TO-92 | 1 |
| 4 | 12k | R1 | R3 | 1 |
| 5 | 10k | R2,R3,R5 | R3 | 3 |
| 6 | 18k | R3 | R3 | 1 |
| 7 | 45k | R4 | R3 | 1 |
| 8 | 470 | R5 | R3 | 1 |
| 9 | 1k | R6,R1 | R3 | 2 |
| 10 | 5 AC 1 0 | V1 | 2P-5.0 | 1 |
| 11 | PULSE(0 4 0 0 0 120u 125u) AC 1 0 | V2 | 2P-5.0 | 1 |
| 12 | PULSE(0 4 0 20u 0 150u 250u) AC 1 0 | V3 | 2P-5.0 | 1 |
| 13 | 1nF | C2 | C1 | 1 |
| 14 | 15k | R2,R6 | R3 | 2 |
| 15 | 10k | R4 | TRIM_POT_PTH | 1 |
| 16 | PULSE(0 4 0 0m 0u 5u 125u) AC 1 0 | V1 | 2P-5.0 | 1 |
| 17 | PULSE(0 4 0 0m 0 500u 1m) AC 1 0 | V2 | 2P-5.0 | 1 |
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