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If you really want to have a very slow running tool, just connect those machines (Dremel or equivalent) to a 12-48 V transformer. (does not matter DC or AC) (This method unfortunatelly does not work with semiconductor speed controlled devices (SCR) :cry: The older Dremel models with...

LED - Light Emitting Diode is a modern source of light on models (an other applications). It does not create heat and has extremely long life and can be extremely small (e.g. SMD LEDs are only few square mm big!) The basic LEDs are Red, Green and Yellow, now extended to Blue and White as...

I fully agree with you :)

I would never use a diode in series with the LED. The LEDs cannot resist to high voltages in reverse, so if you add a diode in series, it still allows high reverse voltages on the LEDs, and usually you will burn them. The best way is to add the diode in antiparallel, i.e. solder the Anode of the...

The problem with upper audio range freqs is that many motors have huge impedance on this frequency (exception are the modern coreless motors), so you will have extreme losses (power reduction) because of inductivity of the coils in the motor). The freq is the main issue on any controller (on my...

Hi everybody, the reasons for AC components on the cheap power pack output can be a underdimensioned transformer, which together with the tracks and the motor can oscillate (not very common effect but I saw few times). The second reason is the motor. Many modern motors tends to create lot...

Hi David, here in Europe it is not permitted to repair fuses (we have to replace them), for that reason since some decades back the fusewire dissapeared from our shops. However is some better HiFi shops, or Caraudio shops you can get high quality loudspeaker cables which have extremely...

Very nice building and scene. :thumb: :thumb: :thumb:

Hi I use this simple way. 1 3 2 1. The basic material 2. Wind and glue (white glue) and cut in half 3. On the roof :)

Hi everybody here is the modified circuit diagram, which will work. Good luck and best regards from Austria

I checked today the Conrad module. It uses CCD devices to store the status of each input i.e. the input must be a stable signal, like switch etc. for the time of sampling. The occupancy detector in your case does NOT provide a stable signal (except for 1/4000 of second, what is to short)...

Hi rschroots in this case there is an error on the drawing. The diode D3 must go on line lower on the PCB i.e. the cathode to the collector of the transistor. Furthermore it will NOT work with Conrad module as it expects stady status on the diode output i.e. high when the block is empty...

Hi everybody. There are few confusions. a. The circuit will work on DCC when the basic conditions for the transistor circuitry are given, i.e. it has the correct polarity. (Emitter negative, collector positive). You cannot simple swap the polarity. b. The circuit will indicate the...

Hi here in Europe you can get such Test track (with rollers). Ther are many vendors offering such equipment. I made my one myself for partion of the price asked in the shops. On a sweep market I could get plenty of cheap roller beerings with pressed in axles. I cut pieces of Aluminium L...

Hi jon-monon it is better, but still there is a problem. What is the voltage on the encoder output which is connected to the TP1 (the first drawing) and what is the voltage on the encoder terminal connected to the TP3 (original drawing). As the active state of your occupancy detector is...

Hi to everybody. on the schematics there are different things wrong. First of all the polarity. To open the transistor you must have on TP1 positiv potential, on the schematic this point is connected to the minus bus (left side bottom). Second. The circuit will work only in one...

Hi RailRon yes, quite close to Rust (about 40 km). Thank you for your compliments. : :)