Nice gift for the little ones (with children's music and fairy tales) or for the elderly (a jukebox with music from the past).
You can also play your favorite music yourself.
Die Suche ergab 42 Treffer
- Freitag 31. März 2023, 11:57
- Forum: Kundenprojekte
- Thema: TonUINO
- Antworten: 0
- Zugriffe: 1760
- Freitag 18. November 2022, 12:07
- Forum: Kundenprojekte
- Thema: 555 Timer with Relay (for model railroad and...)
- Antworten: 1
- Zugriffe: 886
555 Timer with Relay (for model railroad and...)
This circuit can be used to extend signals in time.
A small relay can thus switch lighting or other things that operate on low voltage on or off for a certain period of time.
I think this is useful in model railroading, but other applications are also possible.
A small relay can thus switch lighting or other things that operate on low voltage on or off for a certain period of time.
I think this is useful in model railroading, but other applications are also possible.
- Freitag 9. September 2022, 10:45
- Forum: Kundenprojekte
- Thema: Harry Porter's Relay Computer Clock
- Antworten: 0
- Zugriffe: 1404
Harry Porter's Relay Computer Clock
I was fascinated by Professor Harry Porter's relay computer: http://web.cecs.pdx.edu/~harry/Relay/
Since the whole computer is too complex and expensive, I started with a simplified version of the computer clock.
Since the whole computer is too complex and expensive, I started with a simplified version of the computer clock.
- Montag 24. Januar 2022, 12:10
- Forum: Kundenprojekte
- Thema: DIY 555 Timer
- Antworten: 0
- Zugriffe: 1876
DIY 555 Timer
https://www.instructables.com/Build-Your-Own-555-Timer/
This is where I got the schematic.
Looks really nice with the colored transistors (I use nailpolish: it's cheap and there is no need to wash the brush)
Read this first please: This is where I got the schematic.
Looks really nice with the colored transistors (I use nailpolish: it's cheap and there is no need to wash the brush)
- Montag 22. November 2021, 10:19
- Forum: Anregungen
- Thema: F4 and CTRL-Z
- Antworten: 0
- Zugriffe: 1755
F4 and CTRL-Z
Wouldn't it be nice to add the office function F4 (repeat the last operation) in a next update? It takes 5 mouse clicks, for example, to change the color of a connection. When many connections have to be changed of color and/or thickness , it takes a while. Multiple selection works too, but you alwa...
- Montag 9. August 2021, 08:45
- Forum: Kundenprojekte
- Thema: 4-BIT Binary Counter
- Antworten: 0
- Zugriffe: 2044
4-BIT Binary Counter
A very simple and small digital binary counter with internal and external clock.
https://1drv.ms/u/s!AuX-mO-T-I8rjNE4C2y ... Q?e=w7RqBY
All the files are here: - Dienstag 23. März 2021, 15:26
- Forum: Kundenprojekte
- Thema: 0.5 - 2048Hz 5VDC Pulse Generator
- Antworten: 0
- Zugriffe: 2209
0.5 - 2048Hz 5VDC Pulse Generator
A digital pulse generator for testing digital circuits, especially digital clocks. Very useful combined with a 5VDC power supply. Update: Discarded "D3" from output while it gave interference at testing CMOS IC's, the output could pick up noise while it was low. A resistor (10k) to ground wil also s...
- Montag 1. März 2021, 09:00
- Forum: Einsteigerfragen / FAQ
- Thema: Split does not "split" potential
- Antworten: 3
- Zugriffe: 2112
Re: Split does not "split" potential
I 'm sorry, it was my mistake.
The board I designed consisted of tracks and pads. I redesigned it with only pads at the ends and tracks with holes between them.
Everything is OK now. Even the smallest split will split the potentials now.
Regards, Wilfried Vermeire.
The board I designed consisted of tracks and pads. I redesigned it with only pads at the ends and tracks with holes between them.
Everything is OK now. Even the smallest split will split the potentials now.
Regards, Wilfried Vermeire.
- Donnerstag 18. Februar 2021, 11:00
- Forum: Einsteigerfragen / FAQ
- Thema: Split does not "split" potential
- Antworten: 3
- Zugriffe: 2112
Split does not "split" potential
I just noticed that using split has no effect on the potential of a copper-strip.
Making the standard split a bit wider on one side does the trick.
Regards, Wilfried Vermeire
Making the standard split a bit wider on one side does the trick.
Regards, Wilfried Vermeire
- Sonntag 27. Dezember 2020, 13:42
- Forum: Kundenprojekte
- Thema: KA2284 - Electret Microphone Level Meter
- Antworten: 1
- Zugriffe: 1636
KA2284 - Electret Microphone Level Meter
A gadget to put on the table when one receives noisy guests
- Donnerstag 3. September 2020, 09:21
- Forum: Kundenprojekte
- Thema: SG90 Micro Servo 9g controller with NE555
- Antworten: 0
- Zugriffe: 2883
SG90 Micro Servo 9g controller with NE555
I found the original schematic here: https://model-railroad-hobbyist.com/node/26088?page=2
It works very well with the small SG90 servomotor, I suppose it works with any 5V servomotor.
The servomotor can move to two adjustable positions with a max. angle of rotation of approx. 90 °
It works very well with the small SG90 servomotor, I suppose it works with any 5V servomotor.
The servomotor can move to two adjustable positions with a max. angle of rotation of approx. 90 °
- Donnerstag 14. Mai 2020, 14:09
- Forum: Kundenprojekte
- Thema: Morse Code Tone Generator
- Antworten: 0
- Zugriffe: 2918
Morse Code Tone Generator
Found on Youtube: https://www.youtube.com/watch?v=j1TMmyhzqCk&t
Except SOS I don't know any morse code but it was very educational to build the sine generator.
Except SOS I don't know any morse code but it was very educational to build the sine generator.
- Donnerstag 26. März 2020, 16:21
- Forum: Kundenprojekte
- Thema: IR-remote tester
- Antworten: 0
- Zugriffe: 3083
IR-remote tester
Small, cheap and easy to build. Everybody should have one ;) (If you have a dozen or so remote controles, like me) The photo transistor is connected the wrong way, according to the original schematic, but it does not work connected the "right" way. Perhaps the Chinese put the notch in the wrong plac...
- Dienstag 24. März 2020, 10:29
- Forum: Kundenprojekte
- Thema: Magnet Polarity Tester
- Antworten: 4
- Zugriffe: 2965
Re: Magnet Polarity Tester
Bernd, You are absolutely right about the latching outputs. You can avoid this by using two 3141 Hall sensors next to each other, one with the text in front and the other with the other side in front (the front detects one pole, the back the other). If you are in a hurry to get a APX9141, I can send...
- Sonntag 22. März 2020, 10:04
- Forum: Kundenprojekte
- Thema: Magnet Polarity Tester
- Antworten: 4
- Zugriffe: 2965
Magnet Polarity Tester
A very simple but very useful magnet tester.
A North-pole in front of the APX9141 makes the red LED light up
A South-pole makes the green LED light up.
I bought the APX9141 very cheap on ebay (about 4€ for 10 pieces).
A North-pole in front of the APX9141 makes the red LED light up
A South-pole makes the green LED light up.
I bought the APX9141 very cheap on ebay (about 4€ for 10 pieces).
- Sonntag 1. März 2020, 13:14
- Forum: Kundenprojekte
- Thema: Signal Tracer/Injector (Velleman)
- Antworten: 0
- Zugriffe: 2988
Signal Tracer/Injector (Velleman)
A simple, but useful, signal tracer/injector you can buy from "Velleman".
Of course it's more fun to make it yourself
Of course it's more fun to make it yourself
- Samstag 11. Januar 2020, 16:00
- Forum: Kundenprojekte
- Thema: Ron Hoffman's Model Train Speed Controller (Rev.3)
- Antworten: 0
- Zugriffe: 3368
Ron Hoffman's Model Train Speed Controller (Rev.3)
The best controller I have made (up to now). It's based on the schematic from Ron Hoffman: https://www.gadgetronicx.com/diy-model-train-controller-project/ I implemented the rotary/guitar-switch as used in an other controller to get a more realistic feel. 14-01-2020: Schematic is revised for 12VDC o...
- Mittwoch 6. November 2019, 10:58
- Forum: Sonstiges
- Thema: Not possible to add attachments
- Antworten: 4
- Zugriffe: 4176
Re: Not possible to add attachments
I've been trying for a week now... still not able to upload files.
- Freitag 25. Oktober 2019, 16:31
- Forum: Sonstiges
- Thema: Not possible to add attachments
- Antworten: 4
- Zugriffe: 4176
Not possible to add attachments
I had some troubles before, but now it is not possible for me to add attachments
This error message appears:
This error message appears:
Regards, Wilfried.ERROR
Could not upload attachment to ./files/18678_573be73d3108000853f8414b84652f89.
- Donnerstag 24. Oktober 2019, 13:20
- Forum: Kundenprojekte
- Thema: AtTiny85 Running Light
- Antworten: 0
- Zugriffe: 3603
AtTiny85 Running Light
This is a very simple running light based upon the AtTiny85.
The code is badely written but it is very easy to understand and to change to your own desire.
Files can be downloaded here: https://1drv.ms/u/s!AuX-mO-T-I8rh4sJueB ... w?e=gHFuSh
The code is badely written but it is very easy to understand and to change to your own desire.
Files can be downloaded here: https://1drv.ms/u/s!AuX-mO-T-I8rh4sJueB ... w?e=gHFuSh