PWM85
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20 hours ago •
AdamWelchUK
AdamWelchUK
An ATTiny version of Julian Iletts PWM5 Solar Charge Controller
PWM85
An ATTiny version of Julian Iletts PWM5 solar charge controller.
Here you will find the latest code, schematic, gerber files and bill of materials (BOM) for this project. I've ended up creating two versions - a 5 volt and 3.3 volt version. I'd suggest going with the 3.3v version because it uses less current to run.
More details about the PWM85 (5v) can be seen in this video: https://youtu.be/H_0ykOQyulY For more about the PWM5 (3.3v) try this video: https://youtu.be/bUxVgbcLFes
For more information about Julians PWM5 see his YouTube channel:
Links to components:
| Item | Qty (5v Version) | Qty (3.3v Version) | Link |
|---|---|---|---|
| Attiny85-20SU | 1 | 1 | http://s.click.aliexpress.com/e/Et5RzhFK |
| HT7550-1 5v SOP89 | 1 | 0 | https://s.click.aliexpress.com/e/_sY4ylP |
| HT7533-1 3.3v SOP89 | 0 | 1 | https://s.click.aliexpress.com/e/_sK44Hn |
| IRF3205STRLPBF | 1 | 1 | http://s.click.aliexpress.com/e/eCBoPOkY |
| MMBT3904 | 1 | 1 | http://s.click.aliexpress.com/e/5NIvXsRI |
| MMBT3906 | 2 | 2 | http://s.click.aliexpress.com/e/k4MYvCgu |
| BAW56 | 1 | 1 | http://s.click.aliexpress.com/e/ENxnZxgM |
| BAV99 | 1 | 3 | http://s.click.aliexpress.com/e/nABe4skC |
| 1N4148WS | 1 | 1 | http://s.click.aliexpress.com/e/kqy0RsBq |
| P6KE33CA | 1 | 1 | http://s.click.aliexpress.com/e/ElGVgfDI |
| PDS1040L-13 | 1 | 1 | http://s.click.aliexpress.com/e/BKiTpVtW |
| 1uF Tantalum 25v (1206) | 2 | 2 | http://s.click.aliexpress.com/e/kse9nUJI |
| 4u7 Tantalum 10v (1206) | 1 | 1 | http://s.click.aliexpress.com/e/34nmqFpq |
| 100nF Ceramic (1206) | 1 | 1 | http://s.click.aliexpress.com/e/rDX9xTAY |
| 220pF Ceramic (1206) | 1 | 1 | http://s.click.aliexpress.com/e/q1NDKybW |
| 47nF Ceramic (1206) | 2 | 4 | http://s.click.aliexpress.com/e/KOvnSx1e |
| 82k 1% (1206) | 1 | 1 | http://s.click.aliexpress.com/e/FVhtN6Wk |
| 20k 1% (1206) | 1 | 1 | http://s.click.aliexpress.com/e/t4XNUz08 |
| 220k (1206) | 3 | 3 | http://s.click.aliexpress.com/e/qrlICprK |
| 4k7 (1206) | 1 | 1 | http://s.click.aliexpress.com/e/MaE9ahR6 |
| 10k (1206) | 1 | 1 | http://s.click.aliexpress.com/e/DZdgqr6u |
| 2k2 (1206) | 1 | 1 | http://s.click.aliexpress.com/e/rvi3Y5Bw |
| Blue LED (1206) | 1 | 1 | http://s.click.aliexpress.com/e/5ehDzjx2 |
| WJ301V-5.0-2P Terminal | 3 | 3 | http://s.click.aliexpress.com/e/evt7L9kM |
| 2x3 Male Pin Header | 1 | 1 | http://s.click.aliexpress.com/e/tPcmET3w |
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An ATTiny version of Julian Iletts PWM5 Solar Charge Controller