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A DIY GSM jammer schematic diagram designed for use with GSM1900, operating within the frequency range of 1930 MHz to 1990 MHz. The GSM jammer circuit is intended to disrupt communication between mobile phones and base stations within the specified...
The circuit shown below is a basic latching circuit consisting of a quad 2-input NAND Gate IC. It is configured such that the flip flop circuit U1A and U1B has both its input held at logic "1". Pin 1...
The EPSON PHOTO 830U printer power circuit illustrates the power supply circuit for the EPSON PHOTO 830U printer, which operates as a switching power supply. During normal operation, the power supply input socket receives a 220V AC supply to...
The circuit includes a K-type thermocouple cold junction compensation circuit, a precision 5.000V reference voltage source, and an OP113 operational amplifier. It is capable of measuring temperatures ranging from 0°C to 100°C with a resolution of 0.02°C. The OP113...
A 5-minute circuit can continue to operate during a power outage, providing protection for the refrigerator. The refrigerator power protection circuit, designated as 1136, includes a power transformer that converts 220V voltage through a rectifier bridge (VD1). This setup...
This weblog discusses electronic circuit schematics, PCB design, DIY kits, and electronic project diagrams. A simple DC motor controller circuit utilizing the NE555 timer is presented. Several DC motor speed control circuits are explored, with this being the first...
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