How diagram of power supply
Instead of the regulators of 5 V
Put regulators
7809
7909
in Entry Toroaidl transformer 230v 15-15v
followed FRED diode bridge
Two capacitors of 25V 1000UF
Capacitors of regulators 7808/7909
And 1UF 470UF RUBYCON's's ZLH
Diodes to prevent back flow of FRED
What role in the diagram of this capacitors and resistors after regulators ?
Instead of the regulators of 5 V
Put regulators
7809
7909
in Entry Toroaidl transformer 230v 15-15v
followed FRED diode bridge
Two capacitors of 25V 1000UF
Capacitors of regulators 7808/7909
And 1UF 470UF RUBYCON's's ZLH
Diodes to prevent back flow of FRED
What role in the diagram of this capacitors and resistors after regulators ?
Attachments
The caps are for decoupling and prevents oscillations in the reg.
Resistors are for give minimum load, and your case they may be omited.
Suppres pot in gnd lead, using lm7809/7909 are not needed, and this way they don't do nothing.
Resistors are for give minimum load, and your case they may be omited.
Suppres pot in gnd lead, using lm7809/7909 are not needed, and this way they don't do nothing.
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So I can build the power supply
Simple
Toroaidl Transformer 15-15V 230V
to Diodes Bridge ( 4high quality diodes like "FRED diodes" )
From the diode bridge 2 output voltages of 15V
After 2 filtering capacitors 1000UF 25V
two regulator circuits
7809
7909
input reg cap 1UF 50V capacitor
Output reg cap 470UF 25V and higher
I also need to add grounding
switched power supply Does not have grounding wire ?
FRED diodes? Why? Simple 1N4004 diodes are sufficient. Add a .01µF in // each diode to attenuate 50Hz noise. Fast diodes increase current spikes in the input lead causing even more noise.
I use them regularly amazing diodes -VISHAY SEMICONDUCTOR Hyperfast soft recovery "fred"
for Audio equipment
In all my DIY projects I use this diodes
VISHAY SEMICONDUCTOR - VS-ETX0806FP-M3 - DIODE, HFAST RECT, 600V, 8A, TO220FP
Hyperfast recovery time, extremely low Qrr
low leakage current
soft recovery
🙂
this photo is of a diy mod on my denon dvd 3910
Attachments
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bro this diodes are
hiyper fast soft recovery diodes
i use them
all the audio diy peoject use this diode 🙂
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Wait a minute, stop please!.
I'm confused now. Where do you want to use fast diodes, in the original SMPS or in the new one made of an iron transformer operating at the mains frequency?
A SMPS needs fast diodes, a 50Hz doesn't.
I'm confused now. Where do you want to use fast diodes, in the original SMPS or in the new one made of an iron transformer operating at the mains frequency?
A SMPS needs fast diodes, a 50Hz doesn't.
in the Part of the SMPS power supply
The Diodes Bridge is 4
hiyper fast soft recovery diodes
for the part of theoroaidl transformer diode bridge
I will do 1 more diodes bridge from this diode
I have a lot of these diodes
Although they are expensive diodes .one costs $ 2 🙂
Ah, OK, sorry, if the diode is to be used in the SMPS, then, the use a fast diode is a must.
It happens to me to get confused by the mix in the 7809 and 7909 with the SMPS. Now, please, clarify me what will you want to do in both things separately.
Good Yom Kipur (As I'm atheist I don't know if good is the right word to say, sorry if don't).
Cordially Osvaldo.
It happens to me to get confused by the mix in the 7809 and 7909 with the SMPS. Now, please, clarify me what will you want to do in both things separately.
Good Yom Kipur (As I'm atheist I don't know if good is the right word to say, sorry if don't).
Cordially Osvaldo.
Thanks bro
But I'm not religious 🙂
Let's leave the bridge diodes 🙂
Connection ground tothe second power supply
I just take grounding wire connected to chassis ?
the switching power supply is not grounded
Only live power cable and 0
Power supply with a transformer I want to do with ground
live power cable -red/Brown
0 pawer cable- black/blue
ground cable-Yellow/Green
How do I create the ground ?
Transformer grounding cable to connect chassis
And device power input jack
Need anything else ?
Attachments
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Perhaps it is not grounded to avoid ground loops. If U want to try, put a wire from the chassis to the earth pin, and to the 0V in the supply, SMPS or linear, and then test if hum or noise is picked up. If the answer is yes, try disconnecting some of such wires to search who is causing ground loops and noise pick up.
Sometimes, the 0V to earth can be wired indirectly, say, a .01µF 600V in // to a 1Mohm resistor to discharge the cap. This way, RF can circulate by the cap, but low frequency hum noise (50/60Hz) no.
Sometimes, the 0V to earth can be wired indirectly, say, a .01µF 600V in // to a 1Mohm resistor to discharge the cap. This way, RF can circulate by the cap, but low frequency hum noise (50/60Hz) no.
I need help on the part chosen for the SMPS mode of Danon 2900
One of the components I replaced this coil L909
Its value 4.7UH
His model is LHL08TB4R7M
Inductance- 4.7UH
Current Rating-3A
DC Resistance- 0.025
Frequency - Self Resonan- 30MHZ
Q @ Freq - 40 @ 7.96MHz
I bought this coil PANASONIC - ELC-10D Series 330UH
nductance-330UH
DC Resistance Max-0.32ohm
RMS Current (Irms) - 900mA
DC CURRENT RATING-0.9A
Test Frequency-10KHZ
Can I use a coil that I bought
I worry only because the current value ?
One of the components I replaced this coil L909
Its value 4.7UH
His model is LHL08TB4R7M
Inductance- 4.7UH
Current Rating-3A
DC Resistance- 0.025
Frequency - Self Resonan- 30MHZ
Q @ Freq - 40 @ 7.96MHz
I bought this coil PANASONIC - ELC-10D Series 330UH
nductance-330UH
DC Resistance Max-0.32ohm
RMS Current (Irms) - 900mA
DC CURRENT RATING-0.9A
Test Frequency-10KHZ
Can I use a coil that I bought
I worry only because the current value ?
Attachments
How this Toroaidl transformer from farnell ????
VTX-146-050-115 - MULTICOMP - TRANSFORMER, 50VA, 2 X 15V | Farnell Israel
- TRANSFORMER, 50VA, 2 X 15V
- Power Rating: 50VA
- Secondary Voltages: 2 x 15V
- Secondary Current Nom: 1.67A
- Transformer Mounting: Chassis
- SVHC: No SVHC (19-Dec-2012)
- AC Power: 50VA
- Bolt Length: 40mm
- Bolt Size Max: M5
- Current Rating: 1.67A
- External Diameter: 81mm
- External Length / Height: 34mm
- Lead Length: 150mm
- Mounting Type: Chassis
- Output 2 Voltage Max: 15V
- Output Voltage: 15V
- Primary Voltages: 1 x 230V
- Regulation: 14%
- Single Primary Voltage: 230V
- Single Secondary Voltage: 15VAC
- Temperature Rise: 42°C
- Transformer Type: Toroidal
- Weight: 0.65kg
- Weight: 0.6kg
VTX-146-050-115 - MULTICOMP - TRANSFORMER, 50VA, 2 X 15V | Farnell Israel
No, the inductance you show is about 100 times greater than the original (compare 330µHy and 4.7µHy in the other).
Transformer appears to be capable of a try.
Transformer appears to be capable of a try.
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