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LedTester

6 months ago 111
  • Description
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  • BOM
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Description

As I am from the lighting industry, it has always bothered me that I had to power things up in order to measure the forward voltage of the LED string. For DC systems, most LED strings 
or COB-LED's (ChipOnBoard) are 6 or 12 LED's (18V / 36V) - but you never know.
The diode functionality of DMM's often doesn't even go up to 3V.

 

Here I am using the Aeneng M118 Multimeter as case. 

 

See full project on https://hackaday.io/project/181015-reuse-dmm-bodies

Software: https://github.com/Phoeboss/LED_Tester

 

 

Documents

Boost Stage

Controller

Linear Stage

Measurement

Connectors

M118A

BOM

ID Name Designator Footprint Quantity
1 Battery 5V,BAT TEST_PAD 2
2 60V 60V TEST_PAD 1
3 LCD_BACKLIGHT_PADS BACKLIGHT LCD_BACKLIGHT_PADS 1
4 4.7uF C1 C0603 1
5 10pF C2 C0603 1
6 10uF C3,C5,C6,C29 C0805 4
7 100uF C4,C9 CAP-SMD_BD6.3-L6.6-W6.6-RD 2
8 1uF C7,C8,C11,C13,C14,C15,C16,C17,C18,C19,C20,C21,C22,C23,C24,C26,C27,C28 C0603 18
9 100nF C25 C0402 1
10 SS14 D1 SMA_L4.4-W2.8-LS5.4-RD 1
11 SS210 D2 SMA_L4.3-W2.6-LS5.2-RD 1
12 1N4148WS T4 D3,D4,D5,D6,D7,D8,D10,D13,D15,D16 SOD-323_L1.8-W1.3-LS2.5-RD 10
13 ZMM3V3 D9,D17 LL-34_L3.5-W1.5-RD 2
14 SMF54CA_C541700 D11,D12,D14 SOD-123_L2.8-W1.8-LS3.7-BI 3
15 Meas_3V IN1+ TEST_PAD 1
16 Meas_40V IN2+ TEST_PAD 1
17 BATTERY PADS J1 BATTERY PADS 1
18 ISP AVR J2 ISP AVR 1
19 10uH L1,L4 IND-SMD_L4.0-W4.0 2
20 600Ω L2,L3,L5 L0805 3
21 FILTERED OUT+ TEST_PAD 1
22 LED- OUT- TEST_PAD 1
23 2N7002 Q1,Q10 SOT-23-3_L2.9-W1.3-P1.90-LS2.4-BR 2
24 MMBT5401-C8326 Q2,Q3,Q4 SOT-23-3_L2.9-W1.3-P1.90-LS2.4-BR 3
25 MMBT5551_C2145 Q5,Q6,Q8,Q9,Q11 SOT-23-3_L2.9-W1.3-P1.90-LS2.4-BR 5
26 SI2301CDS-T1-GE3 Q7,Q12,Q13 SOT-23-3_L3.0-W1.7-P0.95-LS2.9-BR 3
27 2M R1,R34,R41,R46 R0603 4
28 560K R2 R0603 1
29 0R R3 R0603 1
30 100K R4,R6,R9,R14,R31,R33,R35,R37,R38,R42,R43,R47 R0402 12
31 10K R5,R10,R15,R17,R23,R24,R27,R28,R36,R44,R49 R0402 11
32 1K R7,R8,R12,R16,R39 R0402 5
33 1M R11,R32,R40 R0603 3
34 2.2 R13,R25,R26 R0603 3
35 68 R18 R0603 1
36 360K R19 R0603 1
37 51K R20,R30 R0603 2
38 680 R21 R0603 1
39 43K R22 R0805 1
40 330 R45 R0402 1
41 ALS-PT19-315C/L177/TR8 R48 SENSORS-SMD_ALS-PT19 1
42 SCL SCL TEST_PAD 1
43 SDA SDA TEST_PAD 1
44 M118A_Display_CON U2 M118A_DISPLAY_CON 1
45 XB61040 U3 SOT-23-5_L2.9-W1.6-P0.95-LS2.8-BL 1
46 LM234DT U4,U5,U7 SOIC-8_L4.9-W3.9-P1.27-LS6.0-BL 3
47 Membrane_PCB_Button_Pad U6,U11,U14,U15 MEMBRANE_BUTTON_PAD_3MM 4
48 HT1621B_C7532 U8 LQFP-48_L7.0-W7.0-P0.50-LS9.0-BL 1
49 ADS1115IDGSR U9 MSOP-10_L3.0-W3.0-P0.50-LS5.0-BL 1
50 XL6007E1 U10 SOIC-8_L5.0-W4.0-P1.27-LS6.0-BL 1
51 ATMEGA328P-AU U13 TQFP-32_L7.0-W7.0-P0.80-LS9.0-BL 1
52 16MHz X1 OSC-SMD_4P-L3.2-W2.5-BL 1

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