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schematic problem

I think the diode at the input is backwards, if the connector P1 is the power supply plug connector.
I built one from your schematic and it seems to work ok, the led is blinking. Now just need to test it on my decoder loop and see if it picks up. This is on the transponder schematic.

Modify arduinoISP to generate clock source for programming of attiny

Investigate if following code can generate a 4mhz clock and if it works to program a attiny with external clock bit set.

/*
    Prorotype Code for 1-4MHz PWM 50% Duty Cycle
    ICR1 as TOP = crystal / (2*Prescale*Fpwm)    in MODE 9
    
    
    at 16000000MHz   64 Prescale PWM Fmax = 62.5KHz 
    at 16000000MHz    8 Prescale PWM Fmax = 500KHz
    at 16000000MHz    1 Prescale PWM Fmax = 4MHz
    
*/

void setup(){

  pinMode(9, OUTPUT);                              // OCR1A Output
  
  pinMode(10, OUTPUT);                             // Just test LED on OCR1B Generally LED
  digitalWrite(10, LOW);
  delay(1000);
  digitalWrite(10, HIGH);
  
//phase/frequency correct mode. 

TCCR1A = _BV(COM1A1);                                               // Enable OCR1A 
//TCCR1A = _BV(COM1A1) | _BV(COM1B1) ;                      // Enable OCR1A and OCAR1B 
// TCCR1A = _BV(COM1A1) | _BV(COM1B1) | _BV(COM1A0) | _BV(COM1B0); 

//TCCR1B = _BV(WGM13) | _BV(CS11);                                  // Set Prescale Clock 8 and Mode 9
TCCR1B = _BV(WGM13) | _BV(CS10);                                    // Set Prescale Clock 1 and Mode 9
}

void loop(){

//ICR minimum 2   F = 16000000MHz  No Change if using 14.7456MHz very close for fucking lazy bitch. and I don't need precision PWM at all.

16.MHz Xtal for PWM Frequency while 14.7456MHz for Precision Baudrate RS232/RS485/RS422

/*make this variable as table.
//ICR1 = 10,000;                     // 100Hz w/16MHz Prescale 8
//ICR1 = 5,000;                      // 200Hz w/16MHz Prescale 8

//TEST 500MHZ MAX
//ICR1 = 2;                            // 500KHz w/16MHz Prescale 8

// Test 4MHZ  MAX
ICR1 = 2;                                // 4MHz w/ 1600000MHz Prescale 1


OCR1A = ICR1 / 2;                    // 50 Duty of ICR1
}