Build your own Test Equipment !!!

[Eugene52]

Build your own Test Equipment !!!

The other circuit file was good too !!! Thank-You ................Eugene

[Carlos]

Les envio un medidor de periodo, lo utilizo para realizar las mediciones de los periodos de los tiempos del detector tipo pi. el contador cambio por el ci 74C926 de 4 digitos, funciona ok!!!
Carlos

They sent a meter of period time, use it for measurement of periods of time detector type pi. I change the IC for the 74C926 with 4 digit display, it works ok! there is in spanish

Carlos

[Fred]

Hi,
Expensve and only 300khz max...
Regards,
Fred.

[Eugene52]

Build your own Test Equipment !!!

Thank-You Fred and Carlos for your posts and input . The most important piece of test equipment , besides an oscilloscope or power supply is a Function Generator , But it must have a very , very low signal to noise and low THD !! I am still searching the internet and will post a few more generator circuits . I will try to put the real good ones I find , in a zip-file for easy reference . I know a good piece of test equipment can sure help to isolate noise problems or chatter with the Tesoro Golden Sabre Light circuit !!...........Regards............Eugene

[Eugene52]

Bench top D.C. power supply

What I am looking for now , are schematics for a dc power supply !!! 0-16 volts d.c. , adjustable is fine , one amp max with over-current protect is perfect . Any Schematic is welcome , and then we will decide which is the best one to build !! Solid-state Heathkit schematics are welcome Too !!! Thank-You for your comments and schematics.................Take Care...........Eugene

[Götz von Berlichingen]

What I am looking for now , are schematics for a dc power supply !!! 0-16 volts d.c. , adjustable is fine , one amp max with over-current protect is perfect . Any Schematic is welcome , and then we will decide which is the best one to build !! Solid-state Heathkit schematics are welcome Too !!! Thank-You for your comments and schematics.................Take Care...........Eugene

A LM317 is fine, if you like simple Solutions.
It has minimum output Voltage of 1.2 V, but i guess this can be hacked
if you connect the 5k pot to -1.2 Volts instead of ground.
http://www.national.com/mpf/LM/LM317.html

[Carlos]

change for the LM337 there are more currents.....3 amp.


Carlos

[joecoin]

Let's not overlook one of the members here who has a lot of projects on his website:

http://www3.telus.net/chemelec/Projects/Projects.htm

Now, if only he would get that 2 box project going.

[Carlos]

forgiveness, committed an error, the correct regulador is the LM350, which provides a maximum current of 3 amperes

Carlos

[Fred]

forgiveness, committed an error, the correct regulador is the LM350, which provides a maximum current of 3 amperes

Carlos

The problem with those regulators is power dissipation if you want a large range of voltages.
For example if we want 5 to 16 v we need a 20v input, then with a 5V-3A output we will have 15X3 = 45W heat dissipation : too much for the IC.
regards,
Fred.

[Götz von Berlichingen]

Let's not overlook one of the members here who has a lot of projects on his website:

http://www3.telus.net/chemelec/Projects/Projects.htm

Now, if only he would get that 2 box project going.

Thanks, i found a nice Schematic of a LM317 (or better)
Power Supply there.
http://www3.telus.net/chemelec/Proje...wer-Supply.htm
The little "Hack" to get 0 Volts minimum is included.

If someone wants High Power without a huge Heatsink,
a switching Power Supply is the only Way.
Dont forget the Fact that most Projects need very low Current,
1 Ampere is plenty for most Electronic Circuits.

[Carl-NC]

If someone wants High Power without a huge Heatsink,
a switching Power Supply is the only Way.

Use a multi-tapped transformer with auto-switching. Technically this makes it a "switching" power supply but without the switching noise.

- Carl

[Eugene52]

Bench top D.C. power supply

[quote=Götz von Berlichingen;80299]Thanks, i found a nice Schematic of a LM317 (or better)
Power Supply there.
http://www3.telus.net/chemelec/Proje...wer-Supply.htm
The little "Hack" to get 0 Volts minimum is included.

If someone wants High Power without a huge Heatsink,
a switching Power Supply is the only Way.
Dont forget the Fact that most Projects need very low Current,
1 Ampere is plenty for most Electronic Circuits.[/quote

Thanks everyone !!! For quick responses . I checked Gary's Chemelec site , a bunch of very good projects , but What I need is a variable dc voltage supply . And I am a person that needs over current protect . 1 amp continuous load or a little less is perfect . I know more schematics and information will be posted here soon on Geotech...............Thanks ..................Eugene52/Member/Stalni-Clan

[Eugene52]

Build your own Test Equipment !!!

Here is one that I like , the schematic from this public website has some missing component values , but the circuit is close to meeting the requirements of what I want for my work bench . So we are "Getting Closer".......................Eugene

[ron_o]

What I am looking for now , are schematics for a dc power supply !!! 0-16 volts d.c. , adjustable is fine , one amp max with over-current protect is perfect . Any Schematic is welcome , and then we will decide which is the best one to build !! Solid-state Heathkit schematics are welcome Too !!! Thank-You for your comments and schematics.................Take Care...........Eugene

Take a look at Tony Van Roon's web site. Just search in google etc for tony van roon.

Regards
R.F.O