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Ultrasonic location sensor

Schematic

Parts List

BUS: 10W-R/A IDC Header with Claws

C1: 0.1uF

C2: 33pF

C3: 33pF

C4: 0.1uF

C5: 10nF

C6: 10nF

C7: 0.1uF

D1: 1N4148

D2: 1N4148

D3: 1N4148

D4: 3.5mm LED

IC1: PIC16F84A-SOIC

IC2: LM78L05ACZ

IC3: NKM2401

IC4: LM358

IC5: SIL-RX2

ICSP-PSP: 6W-R/A 1.25mm pitch Header

L1: COIL

PZ1: 40LR12

Q1: BC550

R1: 100K

R2: 10K

R3: 10R

R4: 560R

R5: 47K

R6: 1M

R7: 1K

R8: 47K

R9: 1K

R10: 47K

R11: 10K

R12: 120K

R13: 47K

R14: 10K

X1: 10Mhz CRYSTAL

 

Build Notes

 

ASM Code for PIC

The latest firmware for the PIC can be found here.  This must be compiled using MPLAB (installed on Prawn).

 

C Code for Demo Application

 

Photo

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This page last updated April 26, 2002
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