In this video I assemble a Frequency Adjustable NE555 Pulse Generator Module DIY Soldering Kit from AliExpress. Including all discounts, shipping, and tax the kit cost an amazingly low £0.51 (yes, 51p)!

NE555 Pulse Generator Kit (Exact Item): https://s.click.aliexpress.com/e/_c3MmfKMp

The kit is based on the famous 555 timer IC, and allows the user to switch between four different capacitor values which is used to adjust the frequency and duty cycle using the a resistor-capacitor (RC) circuit.
NE555 datasheet: https://www.ti.com/lit/ds/symlink/ne555.pdf
CircuitJS Simulation: https://tinyurl.com/25am8ytw

To power the kit I use my adjustable power supply, which I also assembled from a kit!
Adjustable Power Supply Kit: https://s.click.aliexpress.com/e/_c36TXh29

After assembling the kit, I go ahead and test the module: first with the built in LED and secondly with my DSO138 oscilloscope.
DSO138 Oscilloscope Kit: https://s.click.aliexpress.com/e/_c4Dwmsxf

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