Electric fence with car bobin made for sheep.
Maximum input voltage is 15V (Limited by 555 timer chip, voltage on the chip is actually lower for 1v because of forward voltage drop of the diode but anyways keep within 15V because its not good to push components to their limits)
No input reverse polarity protection, if you reverse polarity on input 220uF capacitor will blow up and probably mosfets...
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Using 555/6 as a multivibrator we can measure the capacity of the connected capacitor.
At all times, the 555/6 charges to 2/3 VCC and discharges to 1/3 VCC the connected capacitor, supplying a rectangular signal at the output in accordance with the capacitor charging and dischar...
A simple but flawed idea to make a fixed frequency variable duty cycle oscillator based on a 555
timer and using the push-pull output to drive the RC timing through two routing diodes, a pot and a
series resistor to limit the min/max duty cycle to something sensible at around 9%/91%.
If the diode drops were negligible and the 555 timer output pulled fully up to VCC and down to
**555 timer based PWM LED dimmer**
This project uses PWM to turn on and off a LED (or a strip of them) really fast and changes the duty cycle (Fig.1) so that the human brain perceive it as the dimming of the LED(s). This means that the MOSFET doesn’t have to drop large amount of voltage, this makes the device very energy efficient.
Using a 555 timer and a mosfet to control the speed of a DC motor with a potentiometer.
Video here https://www.youtube.com/watch?v=5nwNKPs2gco
Usando un circuito integrado 555 y un mosfet para controlar la velocidad de un motor DC con la ayuda de un potenciometro.
Video aquí https://www.youtube.com/watch?v=Q2N2OEicXJE
Learn how to make a precisely adjustable timer with a variable delay from 1 - 100 seconds that uses the 555 IC. The 555 timer is configured as a Monostable Multivibrator. The output load is driven by the relay switch which is in turn controlled by the timer circuit.
# Step 1: Parts & Tools #
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**This project is to demonstrate the need for and the basic effect of Power Supply Decoupling.**
In real circuits the power supply is not an ideal zero impedance source. The supply itself has some source resistance even though it may be in the order of tens of milliOhms. The wiring and PCB traces present a resistance but more importantly in terms of impedance, they present an inductance in series...
<p>Using a 555 timer in <em>astable</em> mode as the control signal to a (4066) bilateral switch, whose input is an amplified audio signal (i.r., from an LM386). The output from the switch resembles tremolo.</p>
<p>Runs on +9V.</p>
This is a **fully functional 555 timer** project using publicly available bipolar transistors.
The project uses 24 transistors. The resistance values are taken from the datasheet and are slightly shifted towards the more accessible series of values.
There are three test points.
The PCB design process can be...
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Это простой в изготовлении драйвер rgb светодиодной ленты. Благодарямощным транзисторам охлаждение почти не требуется
This is an easy to manufacture rgb led strip driver. Thanks to the powerful transistors, cooling is almost not required.
My first PCB Design. It will be used in my learn to solder classes at my local public library. Many thanks to Ralph Bacon for the great YouTube tutorials to get me started.
- Part 1 https://www.youtube.com/watch?v=wu2YcZDzzCY
- Part 2 https://www.youtube.com/watch?v=JdqQD-QMHfE
The circuit uses a 555 timer IC in astable mode creating a high / low pulse on the pin 3 output. Using this calculator...