Free electronic circuit design and schematic diagram
We can use NE556 timer IC to make indication of static of terminal in digital logic audible. Audible logic probe can be very useful when we have to visually inspect a part while need to check the logic state on other point apart from the part. Here’s the circuit diagram: NE556 will act as oscillator controlled by IC1 (SN74132N) and […]
Read more
A single CMOS IC is used on this logic probe. This logic probe shows three logic condition, High, Low, and Pulsing. Ind addition, there is no LED’s will glow if the probe input is neither hi or lo ( the high impedance state of tri-output logic IC’s). Here’s the circuit diagram: This logic probe using power from the logic circuit […]
Read more
Multiple Feedback (MFB) is the best filter topology to use for differential low pass filters. Here’s the circuit diagram: To design this filter, a corner frequency is chosen based on harmonic content desired in the waveform. After that, we have to select a value of capacitor. The value of C1 is equal to C and C2 is equal to 2.67 […]
Read more
We can use SSL3250A (an asynchronous boost photo flash dual LED driver) for mobile application. This device ensure a lot of implementation possibilities because it has wide input voltage range and the large maximum output current at a wide output voltage range. It has long battery life and low power strain because of it’s high efficiency and soft-start. This device […]
Read more
On telecom applications, the MAX1637 is a popular device. This device offer a lot of advantages such as PWM operation, small size, high MOSFET-drive capability, wide VIN and VOUT ranges, and excellent protection against over- and under-voltage faults. An auto-retry controller that attempts to restart the system is often needed in telecom application. Here’s the circuit diagram: Undervoltage is related […]
Read more
STANDBY/ON switch below is appropriate for applications (industrial and telecom, for example) in which the circuitry must remember its state (STANDBY or ON) after a power failure that occurs when there is no operator. Because the state can be lost if leakage current drains the battery, we can not just rely on an alternative approach based on battery (or supercapacitor) […]
Read more
High precision analog front end (signal conditioner) presented here can be used for portable ECG equipment that requires single-supply operation. There are two kind of amplifiers on the circuit diagram, the instrumentation amplifier INA326 and the dual precision amplifier OPA2335. Both operate from a single 5V supply and apply autozeroing techniques. Autozeroing techniques will keep the initial offset and offset […]
Read more