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The final power transistors TR2 and TR4 must be mounted on appropriately sized heatsinks to prevent overheating. Suitable options include MJ4033, MJ3007, or other NPN transistors. The maximum power output is dependent on the transformer T1's core size. For...
The circuit below illustrates powering one or two LEDs from the 120-volt AC line using a capacitor to drop the voltage and a small resistor to limit the inrush current. Since the capacitor must pass current in both directions,...
This DC to AC inverter circuit operates based on an unstable multivibrator. In this circuit, the IC CD4047 is selected as the core of the unstable multivibrator because this type of IC provides complementary outputs that are out of...
An NEC602 is utilized as a mixer with a zero intermediate frequency (IF) output, while U2 functions as an audio amplifier. This receiver is mainly designed for single sideband (SSB) and continuous wave (CW) signals. T1 and T2 are...
The circuit operates as a photoelectric switch utilizing a photoresistor. It exhibits high sensitivity, particularly in controlling a light relay. Under low illumination, the transistor (VT) remains non-conductive. When the illumination reaches a certain threshold, the resistance of the...
The FET exhibits a high input impedance, a low noise figure, anti-crosstalk capabilities, and good mutual interference performance, making it increasingly utilized in electronic circuits. FET amplifiers can be configured in various ways, including as common source (equivalent to...
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