DIY 16x Discharger with Arduino Mega 2560 pro mini

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STD DIY 16x Discharger with Arduino Mega 2560 pro mini

License: Public Domain

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Update time： 2023-09-09 18:41:39

Creation time： 2020-08-17 12:44:11

Description

Building 16x(I got only 15 PWM pins.. so 15x)18650 battery discharger. Without charging capabilities. Only concerned for testing batteries.I have copied some of brettwatty's design https://easyeda.com/brettwatty. You can use LM 324 replacing LM 358.

Design Drawing

schematic diagram

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16x 18650 capacity tester
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PCB

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PCB_2020-10-12_22-04-25
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BOM

BOM download Purchase Parts

ID	Name	Designator	Footprint	Quantity
1	LM358	U18,U1,U2,U3,U4,U5,U6,U7	DIP8	8
2	IRLZ44	Q32,Q2,Q1,Q3,Q4,Q5,Q6,Q7,Q8,Q9,Q10,Q11,Q12,Q13,Q14,Q15	TO-220AB	16
3	DS18B20+	U20,U19,U10,U8,U11,U12,U13,U14,U15,U16,U21,U22,U23,U24,U25,U26,U27	TO-92(TO-92-3)	17
4	4.7k	R31	AXIAL-0.4	1
5	Rotary Encoder	P9	ENCODER_KY-040	1
6	LCD 20x4 I2C	P10	HDR-4X1/2.54	1
7	5V 10A	PR9	WJ2EDGVC-5.08-2P	1
8	5.5 x 2.1mm	VIN1	POWER DC 5.5 X 2.1 MM	1
9	MicroSDcard	P11	MICRO SD CARD MODULE - BRETT	1
10	RX TX Serial	P15	HDR-3X1/2.54	1
11	4.7k	R32	R0603	1
12	1K	R33	AXIAL-0.4	1
13	1K	R34	R0603	1
14	10k	R35,R54	R0603	2
15	10K	R36,R53	AXIAL-0.4	2
16	Mega_2560_pro_mini	U9	MEGA 2560 PRO MINI	1
17	100uF	C1	CAP-D5.0XF2.0	1
18	CD74HC4067	P1	CD74HC4067	1
19	1N4007	D7	DO-41	1
20	ESP8266 ESP-01 Adapter for Arduino	U17	ESP8266 ESP-01 ADAPTER FOR ARDUINO	1
21	1k	R45,R16,R17,R18,R19,R20,R21,R22,R23,R24,R25,R26,R27,R28,R29,R30	RES-6.5MMX2.3MM-1/4W	16
22	1N4148WT	D6	SOD-523	1
23	16PIN	JP1,JP2	B16B-PH-K-S	2
24	BD139	Q33	TO-126	1
25	JST_2PIN	FAN1	JST-PH-2-THM	1