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whole output stage is going to be put on a PCB. So transformer similar in size to the one I used before will do. No specific size constraint is there

Thanks I need the transformer to boost the voltage. Can you suggest me any transformer with small size and with higher power rating? I tried but was not able to fine one

Hi I am building a single ended MOSFET output stage and the circuit is attached. I am using Wideband transformer WB4-6.Its datasheet is attached. I need to drive a a transducer which can be assumed to be a 20 ohm load. The problem I am facing is the max. input current rating of the transformer is 250mA. My current is exceeding this limit. How can I make sure that current is lowered without changing the power supply. I have fix power supply of 5V, 15V and 8V. Thanks :) WB4-6.PDF

actually i want a blind stick which doesn't need any power supply. so what i plan is to first convert the pressure into electrical energy using a piezo pressure sensor. so that when a person hits the stick on the ground the pressure will be converted into electrical energy and then I can use this electrical energy to operate ultrasonic sensor and comparator. But the problem is for the comparator circuit i will need a constant power supply and also for the ultrasonic sensor. I planned to use the sensor posted in the above posts the MaxSonar EZ1 but the requirement of constant power supply is posing a problem. Can you suggest a way to over come this constant voltage problem. may be some sensor which doesn't require a constant power supply or anything else

hi again I have read this thread. i have thought of making my blind stick with the help of a ultrasonic sensor, a comparitor and finally a piezobuzzer. however the sensor requires a 5 volt power supply which has to be provided by a piezoelectric material. so i need to know if there are any piezo ultrasonic sensors that could work without any power supply and if not, then how should I go about it since the sensor would require a constant power supply. thanks :)

i am b.tech third year student and i have been given a project to develop a walking stick for the blind using piezoelectric sensors.could you please guide me along these lines and also suggest some references which can guide me from the grass root level.