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Electronic Circuit ding-dong Sound for any Alarm

Electronic Circuit ding-dong Sound for any Alarm Basically the circuit alternates between two frequencies which are adjustable. This produces the “ding-dong” sound.

FM Radio Receiver circuit diagram using TDA7021T

FM Radio Receiver circuit diagram using TDA7021T Parts List: R1 = 8kO2 R2 = 10kO R3 = 390O C1,C3 = 10nF C2,C6,C9,C16 = 100nF C4 = 33pF C5 = 25pF trimmer (Murata type TZB4Z250AB10R00) C7,C10 = 1nF5 C8 = 820pF C11 = 1nF C12 = 68pF C13 = 220pF C14 = 47µF 10V (Nichicon UWX1A470MCL1GB […]

Dimmer

Dimmer using 40502 TRIAC Dimmer using 40502 TRIAC Parts R1 50K Pot R2 15K 1/2W Resistor C1, C2 0.068 250V Capacitor L1 Lamp To Be Controlled (up to 350 watts) L2 Neon Lamp TR1 40502 TRIAC MISC Case, Knob, Heatsink For TR1, Wire, Socket For L1 Notes 1. This circuit is for 117VAC only. 220 […]

Simple Ohmmeter Driver circuit

Simple Swr Avometer Driver circuit Synthetic Isolators, great for checking the SWR of antennas

Audio Power Amplifier

Audio Power Amplifier using IC M5152L and LA4440 Audio Power Amplifier using IC M5152L and LA4440

MC3403 datasheet, Pinout, application circuits

MC3403 datasheet, Pinout, application circuits Quad Low Power Operational Amplifiers using MC3403 The MC3403 is a low cost, quad operational amplifier with true differential inputs. The device has electrical characteristics similar to the popular MC1741C. However, the MC3403 has several distinct advantages over standard operational amplifier types in single supply applications. The quad amplifier can […]

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