Hi Dear All:

I want to build two new linear power supplies, now I already have the power supplies as below:

1 0~50V/ 2A/4A Linear Regulated Adjustale dual polarity Power Supply

With output short-circuit protection using relay.

Base on LM723 and two 2N3055.

This is a kit that I bought it long time ago, so I have the circuit diagram.

2. Fiive Fixed Voltages Linear Regulated dual polarity power supply.

The three fixed voltages that they are series in as ±15V → ±12V → ±9V.

a) ±15V -- Using 7815,7915.

b) ±12V -- Using 7812,7912.

c) ±10V -- Using Six 1N4007. (connected from ±12V).

d) ±9V --- Using 7809,7909.

e) ±5V --- Using 7805,7905. (this transformer is stand alone)

I bought the two transformers as below:

1. PT-47 (Made in Taiwan)

Input : AC 110V

output :

AC 24V,0,24V ------------ 0.6A

AC 0,6V,11V ------------- 2A

AC 42v,36v,0,36v,42v -- 6A

AC 0,24V ----------------- 1A

2. Another Transformer (no type number) --

Input : AC 110V

Output:

0,12v ------- 1A

0,12v ------- 2A

42V,0,42V -- 5A

24V,0,24V -- 2A

The functions of the new power supplies:

1. Linear regulated dual polarity power supply.

2. Dual tracking.

3. Temperature detection and loopback current control.

4. output short-circuit protection.

5. 12bits ADC 7-segments LED Voltage and Current Display

6. USB communication System - Using AT89S52 Can be communicate with computer.

7. LM317 & LM337 Base with 2N3055 And 2N2955 or MOSFET.

8. Adding some other functions or using other regular IC.

I am open my mind to hear any suggestions from you guys.

Thank you.

I want to build two new linear power supplies, now I already have the power supplies as below:

1 0~50V/ 2A/4A Linear Regulated Adjustale dual polarity Power Supply

With output short-circuit protection using relay.

Base on LM723 and two 2N3055.

This is a kit that I bought it long time ago, so I have the circuit diagram.

2. Fiive Fixed Voltages Linear Regulated dual polarity power supply.

The three fixed voltages that they are series in as ±15V → ±12V → ±9V.

a) ±15V -- Using 7815,7915.

b) ±12V -- Using 7812,7912.

c) ±10V -- Using Six 1N4007. (connected from ±12V).

d) ±9V --- Using 7809,7909.

e) ±5V --- Using 7805,7905. (this transformer is stand alone)

I bought the two transformers as below:

1. PT-47 (Made in Taiwan)

Input : AC 110V

output :

AC 24V,0,24V ------------ 0.6A

AC 0,6V,11V ------------- 2A

AC 42v,36v,0,36v,42v -- 6A

AC 0,24V ----------------- 1A

2. Another Transformer (no type number) --

Input : AC 110V

Output:

0,12v ------- 1A

0,12v ------- 2A

42V,0,42V -- 5A

24V,0,24V -- 2A

The functions of the new power supplies:

1. Linear regulated dual polarity power supply.

2. Dual tracking.

3. Temperature detection and loopback current control.

4. output short-circuit protection.

5. 12bits ADC 7-segments LED Voltage and Current Display

6. USB communication System - Using AT89S52 Can be communicate with computer.

7. LM317 & LM337 Base with 2N3055 And 2N2955 or MOSFET.

8. Adding some other functions or using other regular IC.

I am open my mind to hear any suggestions from you guys.

Thank you.

Last edited: