Shared Projects by BattleToad

BOM

Contact me if there are questions.

This Project was inspired by Fran Blanche’s Video about the recreation of a vintage Soviet PCB inside a commemorative model of the Sputnik satellite. This model is an exhibition piece of the Royal Society and nobody knows what its PCB looks like because it is hidden inside the stand. However, the Sputnik model comes along with schematics. Apparently the transistorized circuitry shown there contains some errors which first have to be addressed before we again can enjoy the beeps of the Sputnik (model).

YASB aka Yet Another Sputnik Beeper is my approach to build a working version of this PCB. As Fran did an excellent job with her circuit analysis I shamelessly let my design benefit from this :-). The only difference is the RC bridge R16-C9 which I implemented from the Royal Society’s schematics as is. It turns out that this bridge plays a crucial role in the sound generating process by separating the otherwise continuous howling into single beeps. You can find out more in my lengthier project description.

Since nobody has recently seen the actual PCB inside the Sputnik model we can’t decide wether Fran’s or my approach (which are very similar by the way) is more correct. From the peresent level of knowledge they could both be wrong :-).

Schematics:

3D Model:

BOM

Contact me if there are questions.

This Project was inspired by Paul Carlson’s Video on how to test a relay using a pulse generator and a curve-tracing oscilloscope. The 9V Pulser is a simple circuit which uses a 555 timer to let an LED blink, very similar to what is shown in Chris Gammell’s Getting to Blinky series of videos. An additional load like a relay is attached in parallel to the LED, which then acts as an indicator of the pulses going into the load.

The load and the LED are not directly driven from the 555 timer but from the 9V battery itself. The 555 timer just activates a transistor which switches the power to the load and the LED on and off.

Schematics:

3D Model: