- Thu Mar 11, 2010 3:25 am
#95939
OK I have finally got my ultrasonic sensor circuit to work last night in its final state, which is to drive an outdoor transceiver, and detect the echo, then display it as an analogue signal through PWM and onto an LCD screen in distance. This is all working, however the distance it achieves is only 2 meters and I am just working on improving the effeciency and sensitivity to get 6 meters as you can see the 6 meter echo on the scope, but it just isn't big enough for a comparator to happily pick it up without noise interfering.
Anyhoo, besides that, I want to get my board size and cost down, and at the moment the single most expensive and big component (apart from the sensor itself) is the 1:10 transformer I am using to give me 50V drive (well above 80V thanks to the self resonance) from my 5V supply.
My question is, what type of components could I use instead of a transformer to give me a 1:10 increase of a 5V 40Khz drive signal that are SMD mounted ideally, that way I can also keep my board entirely surface mounted and single sided.
Anyhoo, besides that, I want to get my board size and cost down, and at the moment the single most expensive and big component (apart from the sensor itself) is the 1:10 transformer I am using to give me 50V drive (well above 80V thanks to the self resonance) from my 5V supply.
My question is, what type of components could I use instead of a transformer to give me a 1:10 increase of a 5V 40Khz drive signal that are SMD mounted ideally, that way I can also keep my board entirely surface mounted and single sided.