Simple Tachometer

7 months ago 104
  • Description
  • Documents
  • BOM
  • Attachments
  • Members
  • Comments

Description

Tachometer

Simple tachometer, based on arduino nano. 7 digit display based on ULN2003 and 74HC595 3 buttons:

  1. Reset
  2. Mode switch. Between Hz and RPM.
  3. Point position. Chose how many digits after point will be displayed.

This tachometer uses ATmega328p Input capture register of Timer Counter #1. Also I used a lot of float math in this code. ToDo is to move all math into static point to improve speed. All code you can find here: https://github.com/Ogurezzz/Tachometer

Documents

Schematic

PCB For JLCPCB

PCB For JLCPCB v2

Schematic v2

BOM

ID Name Designator Footprint Quantity
1 RESET KEY1 KEY-SMD_4P-L6.0-W6.0-P3.90-LS10.0 1
2 MODE KEY2 KEY-SMD_4P-L6.0-W6.0-P3.90-LS10.0 1
3 POINT KEY3 KEY-SMD_4P-L6.0-W6.0-P3.90-LS10.0 1
4 Signal LED3 LED-TH_BD5.0_RED 1
5 74HC595N_SEGMENT U2 DIP-16_L19.8-W6.5-P2.54-LS7.6-BL 1
6 74HC595N_DIGIT U3 DIP-16_L19.8-W6.5-P2.54-LS7.6-BL 1
7 ULM2003A U1 DIP-16_L19.8-W6.5-P2.54-LS7.6-BL 1
8 SLR0284DRC1BD LED1 LED-SEG-TH_SLR0284DRC1BD 1
9 SLR0283CRC1BD-6.3 LED2 LED-SEG-TH_SLR0283CRC1BD-6.3 1
10 + - S J2 HDR-M-2.54_1X3 1
11 680R R1 R1206 1
12 10k R2,R3 R1206 2
13 1k R4,R5,R6,R7,R8,R9,R10,R11 R_AXIAL-0.4 8
14 Arduino_Nano_Header J1 DIP-30_L43.18-W15.24-ARDUINONANO 1

Attachments

None

Members

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