P002B: EF95 6AK5 Battery Operated Tube Headphone Amplifier - 4S 18650 Module

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STD P002B: EF95 6AK5 Battery Operated Tube Headphone Amplifier - 4S 18650 Module

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License: GPL 3.0

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Update time： 2023-10-07 12:32:19

Creation time： 2020-12-03 21:49:07

Description

EF95/6AK5 Tube Headphone Amplifier, it's a hybrid amplifier meaning the final amplification is done using an op-amp. The amplifier consists of a UC3843 100v booster for the tubes, an ABLIC S-8254 4s battery protection system, a LM3914 battery level meter, a TP4056 battery charger and a MH-M18 bluetooth module. This project is battery module for this [Tube Amplifier](https://easyeda.com/Ratti3/ef95-6ak5-hybrid-tube-headphone-amplifier) project. See other projects for additional schematics. YouTube Video of project: [Part 1](https://youtu.be/28DwrHB3h8w) [Part 2](https://youtu.be/93-n6Ngaj2w) [Part 3](https://youtu.be/hZghhSwPwPA) Blog: [https://ratti3.blogspot.com/2020/12/making-battery-operated-ef956ak5-hybrid.html](https://ratti3.blogspot.com/2020/12/making-battery-operated-ef956ak5-hybrid.html)

Design Drawing

schematic diagram

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EF95 6AK5 Hybrid Tube Headphone Amplifier - 4S 18650 Module
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Calculations
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PCB

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EF95 6AK5 Hybrid Tube Headphone Amplifier - 4S 18650 Module (5V)
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EF95 6AK5 Hybrid Tube Headphone Amplifier - Rear Panel
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EF95 6AK5 Hybrid Tube Headphone Amplifier - 43 18650 Module (4.6V)
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BOM

BOM download Purchase Parts

ID	Name	Designator	Footprint	Quantity	BOM_Supplier	BOM_Supplier Part
1	LM2596T-ADJ/NOPB	U1.LM2596T-ADJ	TO-220-5_L10.5-W15.5-P1.70-TL	1	LCSC	C21149
2	ZMM22	ZD3,ZD2,ZD1	LL-34_L3.5-W1.5-RD	3	LCSC	C8073
3	MIC29300-12WT	U3.MIC29300-12WT	TO-220-3_L10.0-W4.5-P2.54-T	1	LCSC	C14399
4	XH-3A	CN1,BMS_HML,CN2,CN3,CN4	CONN-TH_XH-3A	5	LCSC	C2316
5	VS-50WQ03FN-M3	SD1	TO-252-2_L6.6-W6.1-P4.57-LS9.9-BR-CW	1	LCSC	C222476
6	330uF	C2,C1	CAP-TH_BD10.0-P5.00-D1.0-FD	2	LCSC	C276508
7	1N4002W	D3,D1,D2	SOD-123F_L2.8-W1.8-LS3.7-RD	3	LCSC	C169542
8	7447471470	L1	7447471470	1	RS-Online	749-8375
9	VH-2A	12VDCIN	CONN-TH_VH3.96-2A	1	LCSC	C16728
10	Relpol DPDT 12V 8A	RL2,RL1,RL3	RELAY-TH_G2RL-2	3	RS-Online	123-2079
11	PH-2AK	CHG_PWR,BAT2,BAT3,BAT4,AMP_SW,BAT1	CONN-TH_PH-2A	6	LCSC	C8886
12	22uF	C4,C3	CAP-D6.3×F2.5	2	RS-Online	315-0940
13	XH-2A	BMS+,BMS-,12VDC_OUT	CONN-TH_XH-2A	3	LCSC	C20079
14	1.3K	R2	R0805	1	LCSC	C144581
15	470R	R1	R0805	1	LCSC	C144560
16	18650 x2 SMT	BAT1-2,BAT3-4	18650 DUAL BATTERY HOLDER SMD RATTI3	2	Digi-Key	36-1048P-ND
17	HDR-M-2.54_1x4	J2,J1	HDR-M-2.54_1X4	2	LCSC	C124378
18	MTP125-1102S1	H1,H2	HDR-TH_2P-P2.54-V	2	LCSC	C358684