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Std EditionReplacement PCB For OP-320A HMI which gives partial Arduino compatability copy

License: Public Domain

Project source: Cloned from Replacement PCB For OP-320A HMI which gives partial Arduino compatability

Published Time:2019-01-12 06:38:31
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Description

The PCB attaches to the back of the OP-320A unit, which is a cheap operator console panel you can get off aliexpress or ebay for about $50, you remove the PCB with the unit and attach this as a replacement to give arduino compatibility.

Wiring mostly copied from teensy++ and uno so something of a mix here, Uses a standard Arduino shield header but you will definitely need to adjust your sketches as some pins will be dedicated to the LCD and keypad. Also added two headers for the 4-pin relay boards and RS-232 boards that cost a dollar or two off ebay. All pins labelled for ease of use.

Note in my system I did not use the back plastic cover as it was going into another panel and the original back cover wont we deep enough to accommodate the unit so you will have to make a back housing and it will be deeper than the original OP-320A.

Second PCB seems to work OK with the bootloader supplied on the chip, the third version (here) has minor layout changes and should be 100% good.

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Weighbridge HMI PLC copy

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Weighbridge HMI PCB copy

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ID Name Designator Footprint Quantity
1 220 R5 0805 1
2 SIP9 KBD HDR1X9 1
3 100n C24,C25,C4,C5 0805 4
4 LCM19264B P SINGLEROWHEADER1X20 1
5 1N4001 D2 SOD123 1
6 BUZZER SG2 BUZZER-12MM-NS-KIT 1
7 2N7002 Q2 WSOT-23 1
8 100 R1 0805 1
9 AT90USB646-AU U1 TQFP64-0.8-14X14MM 1
10 ICSP U2 HDR2X3 1
11 test U3 HDR1X6 1
12 test U4,U6 HDR1X8 2
13 test U5 HDR1X10 1
14 XTALfast Q1 CRYSTAL_HC-49U 1
15 10p C1,C2 0805 2
16 USB-MINIB U7 USB-MINI-B-SMD1 1
17 22 R2,R3 0805 2
18 10K R4,R8 0805 2
19 1u C3 C1210 1
20 PWR D1 LED3MM 1
21 1K R6,R7 0805 2
22 PGM D4 LED3MM 1
23 SPST_OFF RST,HWF/ALE TACTILE-SWITCH-BOZ 2
24 V_REG_LM1117 U9 SOT223 1
25 LM2576HVS-5.0NOPB U10 TS5B 1
26 150u L1 CD127 12*12MM BOZ 1
27 ss34 D5 SMA-DIODE 1
28 220uF CT1 ELECTRO-SMD-C-6MM 1
29 100u C6 PANASONIC_SKV_CAP 1
30 M03-SCREW-5MM JP1 SCREWTERMINAL-5MM-3 1
31 3266P-1-502 R9 P250SQ 1
32 Relay U8 HDR1X6 1
33 RS232-TTL U11 HDR1X4 1
34 24V D3 LED3MM 1
35 1.5A 24V PTC F1 PTC1812L 1

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