eplanet

hi audioguru i am reducing value of R6 but i dont get good result. dont change it. do u thing in my circuit any component was damage?

hi every body i need 2 deferent circuit : 1. convertor :9v battery converting to 3v for LED very simple. 2. very simple soundmeter for 4 or 5 or 6 LED with 9v power supply. do u have anybody these circuits?

hello audioguru thank you for your help to me. but not have result up to now because my circuit have alarm continously. please check it : collector BFR90 : 2.91v IC : pin1 :1.29v pin7: 1.93v pin8 : 1.65v pin14 : 2.04v R6: 1.1M and with C2: 4.7 P1:volume 5k antena: 50cm wire and pin2 of LS connecting to +9v because in pcb not have this connect but in schematic diagram connected. for pin1 that have 1mv what can i do ? thanks for all and all the best

hello audioguru folowing ur question about collector and output of op-amp : tr1 collector : 3.9v op-amp: pin1: 5v pin7: 0.3v pin8: 0.3v and pin14: 7v what sall i do ?

hello muhammad faraz for this system that must be unique which is not accessible to every one who is searching the net u need to progrmming assembly with microcomputer for example PIC and u should encoding ur data or wave that u can send it. good luck

hello I am new user in ur forum I am very enjoy but many years ago reading ur information in any forum specially "audioguru" hello audioguru. I am make pcb eavesdropping device detector but not work no sound. i am testing all component but dont listening any sound of buzzer. no short circuit what can i do ???????????????????????????