complete project

[Pete the Builder]

Hello Tinkerer,
for the LDO´s i have found LM2990(-5V) and LM 2940(+5V)
Datasheet´s are here http://www.farnell.com/datasheets/36866.pdf and here http://www.farnell.com/datasheets/10208.pdf. I think the LT1086 is better(http://www.farnell.com/datasheets/42570.pdf) but i don´t find the equivalent for this chip for -5V.
How much Ampere (or mA) must they have?
I will order some Parts and want order the wire for the coil´s. What size should i buy?

Thanks
mschmahl

Elektor have just published two switching regulators to replace the venerable 7805/7905. The positive regulator will source 1A, the negative 750mA. Both have extremely low dropout voltages, and are up to 90% efficient! Just a thought. Oh, and they can be configured for +/- 12V (and any voltage in between). I'm not sure of the EMI 'silence', though. I might do a couple of boards and make them up to see. Something else for my list... Anyhow, I hope this might be useful!

[Pete the Builder]

Maybe we can convince Pete to get involved with the programming?

Do you mean me, Pete, or another Pete?

I'd be more than happy to do any device programming if it would help out!

If it's not me you mean, then please ignore this message.
-PtB

[Pete the Builder]

the golden coin is a gulden from nederlande it is dated 1588. The smallest silvercoin is a Hochrandpfennig, probably from Magdeburg Germany, datet between 1004 and 1052. The biggest Coin is a Taler from saxony with Johann Georg, dated after 1600,and the other big Coin is Maximilanus from prussia, dated 1616. The middel Coin is a Silbergroschen dated betwenn 1400 and 1500.

Wow. Those are truly amazing finds! I think I'm lucky to find a 1945 penny!

Thanks so much for the explanation. I'm in total awe!
-Pete

[mschmahl]

Thanks, Pete the Builder!
I think Tinkerer means you. The Uni-PI is based on a DSPIC30F4011(4-Channel) or DSPIC30F4012 (2-Channel). The Design is from Moodz.
Conect the Tinkerers_SB_MO with the Uni-PI could be a second step after building it with the Tinkerers_SB_NM_PSU&TX stage.

[6666]

It would be very handy to have a basic PCB for moodz DSPIC30F4012 pic project
say just the pic and LCD and xtal and rotary switches and some pins for ip/op
hint HINT

[sido]

It would be very handy to have a basic PCB for moodz DSPIC30F4012 pic project
say just the pic and LCD and xtal and rotary switches and some pins for ip/op
hint HINT

Agree 6666....I posted for Pete the builder in the UNIPI hardware layout question, no response yet. Maybe Pete has missed it.

I dont have a PCB layout program to be able to produce a negative, but hopefuly one posted would be a start for the UNIPI.

If a different aproach towards a working control timer is in the pipeworks...well will wait for that, hopefully with board artwork.

For now, time does not permit me to commit as much i would love to do so, but i am gathering parts for the Tinkerers sm design. Looks intersting considering the previous new design concepts of Moodz great work has disappeared underground.

Sid

[mschmahl]

Some part´s of the Tinkerers SB are for free as samples from Microchip or Linear Technology. So you can gather part´s there if you don´t find them in shop´s.

[sido]

Some part´s of the Tinkerers SB are for free as samples from Microchip or Linear Technology. So you can gather part´s there if you don´t find them in shop´s.

Cheers for that, will follow it up.

Sid

[mschmahl]

Hello Tinkerer,
i need some help. I have some question to the schematic below.
1. The wiring on pin 4 and pin 11 from U1a and U1b are different. They are the same chip. Which wiring is correct?
2. C14 to C17 is from an other chip and not used, is this right?
3. What is the value for C5 and C32?

Thank´s a lot.
Michael

[Tinkerer]

Hello Tinkerer,
i need some help. I have some question to the schematic below.
1. The wiring on pin 4 and pin 11 from U1a and U1b are different. They are the same chip. Which wiring is correct?
2. C14 to C17 is from an other chip and not used, is this right?
3. What is the value for C5 and C32?

Thank´s a lot.
Michael

Thank you for finding mistakes. I will correct the schema and post again.

U1a and U1b, Correct, it is the same chip and only one should have the power supply and bypass. I do not see any difference though, either one is correct.

C14 to C17, not used. I seem to have posted a wrong version of the circuit, before cleanup. sorry.

C32, a simple PSU bypass, 10nF to 100nF

C5 =100nF this is a level shifter.

About your LDO's, they should work. We want to have a minimum noise on the PSU for the analog. Maybe low noise LDO's are worth the higher cost.
I have LT1763, LP2951, LT1964, on my shopping list Digi-Key, but a lot depends how easy the parts are to get where you are and if you want to use through hole or SMD as some are not available either way.
TI have some good low noise LDO's

Wire for the coil. Probably the best would be tin plated fine strand AWG#12 or #14 for the TX and BU, The gauge makes a significant difference in power consumption.

AWG #22 or so, fine strand is fine for the RX.

Tinkerer

[6666]

Hi Sido
thanks .

[mschmahl]

Thank´s a lot tinkerer. Now it´s clear. I´m now searching for dealer for the part´s here in germany. The good thing is I've already found the most part´s. If they are not available as trough hole part´s than i will use SMD. Soldering both is no problem. I think i will first built the tinkerer_SB on Testboards . Later a good PCB is a must.

[Tinkerer]

Thank´s a lot tinkerer. Now it´s clear. I´m now searching for dealer for the part´s here in germany. The good thing is I've already found the most part´s. If they are not available as trough hole part´s than i will use SMD. Soldering both is no problem. I think i will first built the tinkerer_SB on Testboards [ATTACH]23100[/ATTACH]. Later a good PCB is a must.

The TINKERERS will work OK on the test board. It is quite robust.

Have a look at DESIGNSPARK http://www.designspark.com/page/desi...-pcb-home-page

It is really free. I use it for my schematics and PCB's.

[mschmahl]

Thank´s for the link. I will try to make a pcb with Designspark.

[joop]

Hi Guys,

I am a bit lost with this project... What is the general idea? I see so many different schematics. Is there a complete collection somewhere, including coil description? If it is a discriminating PI I am surely interested in starting a build.

Thanks.