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