Fading LED on and off with astable 555 timing capacitor and op amp voltage follower
The 555 timer's timing capacitor wired in astable mode will keep charging and discharging between 1/3 and 2/3 of the supply voltage. I wanted to use that changing voltage to change the voltage across an LED. An op amp wired as a voltage follower will look at the capacitor voltage, and power a light load at that same voltage. The Anode of the LED is connected to the positive supply, so when the cathode side voltage gets lower, the LED gets brighter. Whereas when the LED cathode side voltage goes up, the LED gets more dim, because there's less voltage difference. ... https://www.youtube.com/watch?v=UKQFc-AioV0
https://youtu.be/bovNYEL16ag Light Dependent Resistor LDR controlled 741 op amp astable multivibrator electronics circuit.
https://youtu.be/k-d4J0HgTcE Zener diodes clamping an AC voltage in 741 op amp astable mode circuit for learning electronics.
https://youtu.be/ilNluvCICCo Multimeter changing voltage measurements 741 op amp square wave generator astable multivibrator
https://youtu.be/KZb7wENVmD0 Updated 741 op amp square wave generator astable multivibrator circuit build 4 learning electronics
https://youtu.be/N7224PbVpOg Testing UA741 op amp internal output short circuit protection for beginning learning electronics
https://youtu.be/nyRpXa1IISw Negative 1 gain Inverting amplifier 741 op amp circuit build for beginning learning electronics
https://youtu.be/8kTXLpYlmLQ Non inverting amplifier follower with gain of 2 circuit using 741 op amp for learning electronics
https://youtu.be/SL8M5yAoZL4 Unity gain voltage follower circuit made with 741 UA741 op amp for beginner learning electronics
https://youtu.be/lCRaac7zQDo How to wire 741 op amp to turn a 18V single supply into a 9 volt positive and negative split supply
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#electronics #741 #opamp
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https://www.youtube.com/watch?v=2yXV1XGzOdI
Diodes have a huge impact on the voltage of the rest of the circuit they are in series with.
https://electronzap.com/002-diodes-especially-led-rectifier-forward-reverse-bias/
Luckily, the way they influence voltage while forward or reverse biased, is really predictable once you learn the electrical properties and take mulltimeter measurements of voltage and current.
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#diode #electronics #tutorial
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https://www.youtube.com/watch?v=1YmoKbYAQQ0
5 band color code for multiple of 100 https://amzn.to/32ahIX4 Anezus 1280 Pcs 64 Values Resistor Kit 1 Ohm-10M Ohm with 1% 1/4W Metal Film Resistors Assortment used in this video.
https://youtu.be/0BtMnYYszsM Electronics current Ohms law explained and multimeter measurements video
https://youtu.be/iQzaCZ-jOHw Electronics Ohms law current for a resistor plus series diode voltage drop measurements and demo video
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#electronics #colorcode #resistors
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https://amzn.to/2KamTAe LED kit used in this video.
https://youtu.be/sVoxQZjwfZs Fast blinking and slow flashing automatic color changing red blue green RBG LEDs
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#power #electronics #energy
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#resistance #voltage #power
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555 timer wired up in astable multivibrator mode. Step by step build and explanation following a diagram I put together. Voltage measurements of capacitor and oscilloscope measurements of output.
555 timer bistable mode push button controlled flip flop circuit build and explained https://youtu.be/62sLAtXbs6Q
555 timer monostable multivibrator one shot circuit controlled by push button switch demo explained https://youtu.be/674mPQUbz6Q
#DIY #electronics #circuits
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https://www.youtube.com/watch?v=MYWOIKHkVOU
Using a LM358 single supply op amp, I light an LED when sound is picked up by a condenser microphone. Step by step circuit build using a schematic diagram I drew.
https://electronzap.com/lm358-condenser-microphone-sound-activated-led-circuit/
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#LM358 #opamp #electronics
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#electronics #capacitors #oscilloscope
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https://www.youtube.com/watch?v=359HhIe6ri4