433mhz Espruino <-> Arduino

Well, my RX unit is defective NOW...

I got VCC and GND backwards, and within a few seconds, I smelled hot electronics and the op-amp was too hot to touch. Now even connected correctly, it doesn't work, and the op-amp rapidly heats up.

This has not been a good week for me - I've broken $15 in parts in just the past 2 days.

The only way I can think of to send those pulses from Espruino is this - am I missing something?

var txpin=A1;

function sendTest() {
  digitalPulse(txpin,1,4); //4ms start
  digitalPulse(txpin,1,0); //wait for 4ms to finish
  digitalPulse(txpin,0,0.5); //pause after 4ms
  digitalPulse(txpin,0,0); //wait to finish
  digitalPulse(txpin,1,1.3); //send a 1
  digitalPulse(txpin,1,0);  // wait to finish
  //and so on...
}

Are the digitalPulse(txpin,state,0); lines necessary? Will this work, or will there be gaps that throw off the timing? Of course, I can't test anything since I burned out my receiver.