Turbocharged Rimatron 7MX

[Legaucho]

NPN transistor

Thanks a lot
Luc

[Qiaozhi]

Again me, what is the type of transistor Q1 in Turbocharged Rimatron 7MX
Merci d'avance
Luc

The markings are unclear, but any general purpose npn transistor will be ok.

Sometimes these Smart2 M6 detectors become available on eBay, but make sure you buy the correct model. It must be the motion detector version that contains the Rimatron 7MX PCB. See pictures below.
Otherwise you can build one from scratch, but you will need to construct your own coil.

[Legaucho]

Q1 Transistor

Bonjour Luc,

You appear to own one of these detectors.

I believe this component is some form of filter. Probably a couple of inductors in series, with a capacitor to ground from the center connection. I haven't tried this but I suspect removing this component will have little effect on the circuit. If I get a spare minute I'll try this, unless you have the opportunity to test it yourself.

Are you planning to do the modifications?

Bonne chance!
Qiaozhi

Again me, what is the type of transistor Q1 in Turbocharged Rimatron 7MX
Merci d'avance
Luc

[Legaucho]

Filter

Bonjour Luc,

You appear to own one of these detectors.

I believe this component is some form of filter. Probably a couple of inductors in series, with a capacitor to ground from the center connection. I haven't tried this but I suspect removing this component will have little effect on the circuit. If I get a spare minute I'll try this, unless you have the opportunity to test it yourself.

Are you planning to do the modifications?

Bonne chance!
Qiaozhi

Many thanks for your answer, I will try to build it in next few weeks after I was finished the Barracuda one.
Merci
Luc

[Legaucho]

Filter

Bonjour Luc,

You appear to own one of these detectors.

I believe this component is some form of filter. Probably a couple of inductors in series, with a capacitor to ground from the center connection. I haven't tried this but I suspect removing this component will have little effect on the circuit. If I get a spare minute I'll try this, unless you have the opportunity to test it yourself.

Are you planning to do the modifications?

Bonne chance!
Qiaozhi

Many thanks for your answer, I will try to build it in next few weeks after I was finished the Barracuda one.
Merci
Luc

[Qiaozhi]

It was from Maplin Electronics.
Unfortunately I cannot find the part number on their website. I'll look it up in the Maplin catalogue when I return home in a couple of weeks.

Hi Sean,

I think this may be the one ->
http://www.maplin.co.uk/module.aspxI...&doy=29m1#spec
although the dimensions (160x103x43) seem to be slightly smaller. In my case the 43mm dimension is more like 53mm. This might be a mistake on the website (and in the catalogue) but it could also be a newer replacement. Also note that the end panels are each secured by 2 screws instead of the original 4. Later this week I'll visit the shop to check for myself.

[Qiaozhi]

Qiaozhi, I'm enjoy looking on your success.
people sketching some schematic from PCB frequently mistakes and put a speaker in collector of output transistor. but really the speaker lies in emmiter. what you think on this? does the subject some advantage?

Hi KT315,

The speaker is definitely connected in series with the collector of Q1 in this design. Frequently it is located in the emitter leg, but it depends on the circuit. The audio output from the speaker in the Rimatron is actually quite loud.

[Qiaozhi]

Can you post a full circuit board Photo ? SCR=silicon controlled rectifier? Where in the schematic is the SCR , I only see many tie points connected to a SCR symbol . Interesting Circuit. Thanks Eugene [email protected]

Hi Eugene,

I have posted the full circuit.
The nets labelled SCR are all connected to the screened connection of the coil cable. Perhaps I should have called this net SCREEN to make this clearer. The GND net floats a couple of volts above SCR, as this design runs from a 5V regulated supply only. There is no negative supply as such, and measuring the voltage at SCR (with reference to GND) will indicate a negative potential.

[Qiaozhi]

Dear QIAOZHI,
Can you tell me what is this component labelled F1 on your drawing
sorry for my english language ( I'm french )
best regards
Luc

Bonjour Luc,

You appear to own one of these detectors.

I believe this component is some form of filter. Probably a couple of inductors in series, with a capacitor to ground from the center connection. I haven't tried this but I suspect removing this component will have little effect on the circuit. If I get a spare minute I'll try this, unless you have the opportunity to test it yourself.

Are you planning to do the modifications?

Bonne chance!
Qiaozhi

[amtech2005]

Turbocharged Rimatron 7MX

Can you post a full circuit board Photo ? SCR=silicon controlled rectifier? Where in the schematic is the SCR , I only see many tie points connected to a SCR symbol . Interesting Circuit. Thanks Eugene [email protected]

[kt315]

Qiaozhi, I'm enjoy looking on your success.
people sketching some schematic from PCB frequently mistakes and put a speaker in collector of output transistor. but really the speaker lies in emmiter. what you think on this? does the subject some advantage?

[Legaucho]

Component

Dear QIAOZHI,
Can you tell me what is this component labelled F1 on your drawing
sorry for my english language ( I'm french )
best regards
Luc

[Qiaozhi]

What Case did you use for the 7MX Turbo (the nice aluminium one in the photo) please?

It was from Maplin Electronics.
Unfortunately I cannot find the part number on their website. I'll look it up in the Maplin catalogue when I return home in a couple of weeks.

What Case did you use for the 7MX Turbo (the nice aluminium one in the photo) please?

[Qiaozhi]

Qiaozhi, good job!

Thanks my friend. As you can see we both like to take things apart to see how they work.