Audio Oscillator Driven by a SCR (CIR832E)

Figure 1 shows a simple audio oscillator driven by the SCR When the sensor is closed. The circuit can be easily mounted using a terminal strip as a chassis. Observe the position of the polarized components as the transistors and power supply lines.




Q1 - BC548 or equivalent general-purpose negative-positive-negative (NPN) silicon transistor

Q2 - BC558 or equivalent general-purpose positive-negative-positive (PNF) silicon transistor

P1 - 100 k - trimmer potentiometer

R1 - 10 k x 1/8-watt resistor (brown, black, orange)

R2 - 1 k x 1/8-watt resistor (brown, black, red)

C1 - 100 µF x 12-volt electrolytic capacitor

C2 - 0.047 µF ceramic or polyester capacitor

SPKR 4- or 8-ohm small speakers (2.5 to 10 cm)

Terminal strip, box, wires, solder, etc.



However many patients become embarrassed when tight to buy remedies from the Web because they don't know what is accessible. It isn't difficult for consumers to purchase medicines online. How it is possible? At present sundry articles were published about Generic Cialis Soft. Perhaps you already know slightly about it. A generic form of sexual disfunction among men is the erectile malfunction. What do you already know about Levitra 20mg? A number websites describe it as Levitra overdose. Diabetes can promote to erectile dysfunction. There are side effects possible with any type of generic.