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Lora Mobile (ATMega4809)

1 year ago 1326
  • Description
  • Documents
  • BOM
  • Attachments
  • Members
  • Comments

Description

Mobile data terminal that runs off 2xAA batteries with 128x128 GLCD, 125Khz EM4100 RFID, BarcodeReader and Lora communications. Based on the new ATMega 4809

Note, this is based on my original PIC16F18857 design which has been working quite well, the only thing that has changed is to replace the microcontroller with the new ATMega4809. The total BOM cost for this board is well under $99 even paying for single qys so it should make a nice data collection platform for fans of the AVR eco system.

Note the PIC version ran quite happily for several weeks of normal use on rechargable AA batteries, I expect the new ATMega should achieve similar sleep current.

The UPDI interface is non-standard and connected to the Atmel ICE programmer using flying leads or a custom cable. I am working on transfering my PIC code from MPLAB to Atmel Studio this should take a few weeks once I have the board back from the fab. I have attached a picture of the insides of my PIC version so you can see how it all fits together, I will update this picture with the actual unit once its done.

really looking forward to working with this new chip.

Documents

Handheld Terminal Schematic copy

Handheld Terminal PCB copy

BOM

ID Name Designator Footprint Quantity Manufacturer Part Manufacturer Supplier Supplier Part Price LCSC Assembly Mounted LCSC Molex East Rising
1 100n C3,C1,C15,C2,C9,C10 0805 6 0805F476M100NT FH LCSC C108658
2 Connector for MT700PA BARCODE FH12-12S-0.5SH 1 LCSC C21531 54548-1271 (or equiv)
3 1u C19,C20,C21,C22,C6,C7 1206 6 1206F105M500NT FH LCSC C1926
4 10u C18,C29,C4,C5,C8 1206 5 1206B106K160NT FH LCSC C39127
5 Backlight Connector BL HDR1X2 2MM 1 LCSC Yes PH-2AW
6 100 R5,R10 0805 2 0805W8J0101T5E UniOhm LCSC C25277
7 Connector for ERC128128-3 LCD FPC-31-0.5MM (REVERSED - CHECK B4 USE) 1 East Rising ER-CON31HT-1 (or equiv)
8 SI2301DS M2,M3 WSOT-23 2 SI2301CDS-T1-GE3 VISHAY LCSC C10487
9 100K R15,R2 0805 2 0805W8J0104T5E UniOhm LCSC C25611
10 Battery 2XHIMH-AA-BAT HDR1X2 2MM 1 LCSC Yes PH-2AW
11 MCP16251 U3 SOT-23-6L 1 MCP16251T-I/CH MicrochipDirect.com
12 560K R6 0805 1 0805W8J0564T5E UniOhm LCSC C25637
13 330K R8 0805 1 0805W8J0334T5E UniOhm LCSC C25629
14 4.7uH H1 TDK CLF6045NI-D 1 SLF6045T-4R7N2R4-3PF TDK LCSC C93218
15 1N4148WS D2 SOD323F 1 1N4148WS SEMTECH LCSC C57759
16 SP6201EM5-3-0-TR U1 SOT-23-5 1 SP6201EM5-3-0-TR SIPEX LCSC C6856
17 4809 ATMEGA4809 TQFP-48_7X7X05P 1
18 PGM PGM M1X4 1

Attachments

Filename Download
Lora-Terminal-Assembled.jpg
Terminal Insides.jpg

Members

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