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Voltampermeter

1 year ago 1477
  • Description
  • Documents
  • BOM
  • Attachments
  • Members
  • Comments

Description

Simple AVR voltamperemeter, based on INA219, ATmega8, 2481AS 7-segments displays.
Allows you to measure voltage in the range of 0-26V in 0.01V steps, current in the range of 0-3A with a step of 1 mA.

Embdeded calibration with two buttons, recovered in EEPROM.
Configurable dynamic display period and refresh rate.

Documents

Scheme

PCB

BOM

ID Name Designator Footprint Quantity
1 100nF C1,C2,C4 0805 3
2 10uF C9 C1206 1
3 2481AS CUR,VOLT 2481AS 2
4 1206 L2 INDUCTOR-1206 1
5 1206 0R1 R1 R2512 1
6 220 R2,R3,R4,R5,R6,R7,R8,R9 R0805 8
7 10k R10,R11,R12 R0805 3
8 3*4*2mm SMD RESET1,RESET2 3*4*2MM 2
9 ATMega8 U3 TQFP-32_L7.0-W7.0-P0.80-LS9.0-BL 1
10 INA219BIDCNR U5 SOT-23-8_L3.0-W1.7-P0.65-LS2.8-BR 1
11 78L05 U6 SOT-89-3_L4.5-W2.5-P1.50-LS4.2-BR 1

Attachments

Filename Download
voltamperemeter.zip

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