Elenco's Capacitance Substitution Box Model K-38/CS-440

The Elenco's Model K-38 Capacitance Substitution Box is a trouble shooting tool that can be used in repairs. For example, where a capacitor value is unknown or in new electronic designs that the capacitor value is aloof. The Capacitance values are from 100picoFarad to 0.1microFarad. The video below shows the test out of the substitution box using a Multimeter.

Finished

Capacitors, switches, and wires installed on the PCB

PCB back soldered capacitors, switches, and jumpers installed

Wiki Farad Info



Velleman's MK103 Sound-to-LIght Unit

This was a fast little gadget to assemble, which translates sound into light. Sound is taken in by a microphone and translated into light using four high-intensity LEDs. Sensitivity of the microphone can be adjusted using a potentiometer. This unit has practical use for the hearing-impaired, for example, to indicate a teleophone and doorbell ringing, or for the fun of it.

 

 

 

 



Elenco Model AM/FM-108K

I had to put this project together in a rush; in addition, for use as a receiver for a AM and FM transmitter that I have yet to assemble. In the video, I am tuning the FM station with no test equipment and with the aid of a Voltage Meter. In the future, I plan to do a second assembly of this model with more details and properly tested with an Oscilloscope, Function Generator, and Voltage Meter. This was a fun project because one assembles the radio in modules. Again, I will do a more detailed check out with the second model. I just had not posted in a few months and wanted to let everyone know the blog is still alive.  

Work Bench 2013

Organized 

Hope to return to the work bench in a few weeks with more educational electronic projects. 

Elenco's PK-201, CI-22 Experiment PC8: Electronic Rain PC

The objective of this experiment is to demonstrate wait mode with multiple colors; more over, I view the waveform signal between the input and output of the 10K ohm resistor. Lastly, this experiment ends the CI-22 and concludes the PK-201 experiment kit. 

Circuit

Waveform

Spectrum

Colored waveform in wait and storage mode

Colored spectrum 

Measuring between 10K ohm resistor

Measure connection

Waveform

Elenco's PK-201. CI-22 Experiment PC7: Electronic Sound PC

The objective of this experiment is to look at the output signal from a transistor oscillator while changing the pitch of the sound with four sets of capacitors and resistors. I will show both waveform and spectrum for each set. 

Circuit

A 0.005 microfarad capacitor with: 10K, 33K, 100K, and 1M ohm resistors. 

Waveform 10K ohm resistor

Spectrum of 10K ohm resistor

Waveform 33K ohm resistor

Spectrum 33K ohm resistor

Waveform 100K ohm resistor

Spectrum 100K ohm resistor

Waveform 1M ohm resistor

Spectrum 1M ohm resistor

A 0.047 microfarad capacitor used with: 10K, 33K, 100K, and 1M ohm resistors

  

Waveform 10k ohm resistor

Spectrum 10K ohm resistor

Waveform 33K ohm resistor

Spectrum 33K ohm resistor

Waveform 100K ohm resistor

Spectrum 100K ohm resistor

Waveform 1M ohm resistor

Spectrum 1M ohm resistor

A 10 microfarad capacitor used with: 10K, 33K, 100K, 1m ohm resistors.

Waveform 10K ohm resistor

Spectrum 10K ohm resistor

Waveform 33K ohm resistor

Spectrum 33K ohm resistor

Waveform 100K ohm resistor

Spectrum 100K ohm resistor

Waveform 1M ohm resistor

Spectrum 1M ohm resistor

A 100 microfarad capacitor used with: 10K, 33K, 100K, 1M ohm resistors.

Waveform 10K ohm resistor

Spectrum 10K ohm resistor

Waveform 33K ohm resistor

Spectrum 33K ohm resistor

Waveform 100K ohm resistor

Spectrum 100K ohm resistor

Waveform 1M ohm resistor

Spectrum 1M ohm resistor

Elenco's PK-201, CI-22 Experiment PC6: Noisy Blinker PC

The objective of this experiment is to demonstrate wait mode with multiple colors of a waveform. Wait mode in an oscilloscope scans then waits until the waveform exceeds the trigger level. Combining wait mode and storage mode with color codes allows one to compare waveform signals for analysis. 

Circuit

Waveform

Wait mode with colored waveform

Storage and wait mode with color coded waveforms

Frequency spectrum wait mode does not apply