121.วงจร Stereo Pho Preamplifier (RIAA)
122.วงจร Subcarrier(SCA ) Adapter จากเครื่องรับ FM
123.วงจร Suction Cup Phone Pickup
124.วงจร Switching Converter 12V to 5.1V
125.วงจร Syncrodoubler PAL On SVGA PCB
126.วงจร Telephone Call Logger
127.วงจร Temperature Regulator
128.วงจร The Universal DC and Temperature Meter (MC68HRC908JK) PCB
code
#include"thermometer.h"
//struct nv ee;
void dispput(signed char val)
{
unsigned char i;
if(val<0) {
disp[3]=0x40;
val=-val;
} else disp[3]=0;
for(i=0;i<3;i++) {
disp[i]=seg[val%10];
val/=10;
}
}
const unsigned int digvals[]={1,10,100,1000};
void HC08Setup(void)
{
CONFIG1=0x17; // STOP enabled, LVI & COP disabled
CONFIG2=0x00; // IRQ pullup enabled
}
void main(void)
{
unsigned char i;
display_init();
asm("cli");
for(i=0;i<4;i++)
{
disp[i+4]=0;
}
ADSCR=0x29; // ADC - continuous conversion of PTD2
ADICLK=0x00; // ADC - BUSCLK/1 (BUSCLK ~ 1MHz)
while(1)
{
dispput(temp_conv[255-ADR]);
}
}
129.วงจร Time Domain Reflectometer(TDR)
130.วงจร Transmitter Pack Low Battery Alarm PCB