Free electronic circuit design and schematic diagram
This is a video about how o make a PCB. This video shows step by step in making a PCB. There are 13 step in making a PCB they : 1. develop schematic sing eagle layout editor 2. Convert to board layout 3. Optimize board layout 4. Print layout to peel-n-press paper using laser printer 5. Clean copper clad PCB […]
Read moreThis is a video about light switch wiring. Light switch wiring is easy, but remember to turn off the circuit breaker to prevent the electric shocking. The switch has two screws and the green grounding screw. Connect the the wires on the two screw and the bare ground wire to green ground screw. Here is the video:
Read moreThis video is Wiring Light Fixture. First thing that is must to do is turn off the circuit breaker to prevent electric shock. We can also use the tester to make sure the power is off as well. Then connect the wires on the fixture with the wires on the box. The white wire on the fixture is connected to […]
Read more
The figure below shows a simple embodiment of the analog multiplier. This circuit provides three quadrant analog multiplication which is relatively temperature insensitive and which is not subject to the bias current errors which is plague most multipliers and circumvents many of the problems associated with the log-antilog circuit. By considering A2 as a controlled gain amplifier, amplifying V2, whose […]
Read more
A circuit that can drive three to four high power LEDs is shown on figure below. The ADP 1610 is an adjustable boost regulator. The voltage headroom and current for the LEDs is provided by this device. An average gain of 12 feedback network that servos the Rset voltage and the ADP1610 FB pin 1.2 V band gap reference voltage […]
Read moreThis is a circuit of Closed-Loop Automatic Power Control for RF Applications. The circuit uses a log detector (AD8318) and a VGA (ADL5330). This circuit has a high temperature stability because of the high temperature stability of the AD8318. The AD8318 also ensures the same level of temperature stability at the output of the ADL5330 VGA. The ADL5330 is converted […]
Read more
This is a circuit of RC5 Infrared Remote Control Transmitter. This circuit uses The PCA8521 that when a key pressed, the PCA8521 generates It generates output pulses, in accordance with the RC5 protocol. Although the IC doesn’t contain a software programmable processor, it contain a ROM which can be used to store the codes that have to be transmitted. Here […]
Read more