Showing posts with label Symmetric. Show all posts
Showing posts with label Symmetric. Show all posts
Saturday, 26 November 2016
Symmetric Output for USB Audio DAC
This simple adapter circuit is specially intended for use with the USB Audio DAC published in this website elsewhere. With an easily implemented modification, it is possible to make the output of the D/A converter pseudo-symmetric, so that it can be connected to professional equipment having XLR line inputs. This will do even more justice to the high quality of the USB Audio DAC. The modification actually amounts to just adding a single resistor (R11a) and changing the value of the existing resistor at the output of the audio DAC (R11) from 100 Ωto 68Ω. Components C14 and R12 remain unchanged. It is not difficult to make this change on the printed circuit board of the audio DAC, but a bit of improvisation is necessary. After replacing R11 with a 68-Ω version, unsolder R12 and connect R11a in series with it. Bring out the junction of these two resistors to act as the signal return connection (pin 3 of the XLR socket). The same operation must also be carried out on the right channel, where the affected resistors are labelled R16, R16a and R17.
Tuesday, 15 November 2016
Adjustable Symmetric 1 to 24VDC 1A Power Supply
This is the circuit diagram of adjustable symmetric 1 to 24VDC, 1A Power Supply. This power supply give dual output positive and negatif output, you can adjust both positif and negative output (+1 to +24VDC and -1 to -24VDC). This kind of power supply also known as dual polarity power supply or splitted power supply which give positive anf negatif output.
This power supply can be used for universal usage, which required not more than 1A DC current. Please take a note that you should adjust the output voltage using general multimeter or DC voltmeter before use this power supply to protect the supplied devices.
Circuit Features:
- Low cost universal symmetric power supply
- Just add a suitable transformer and a heatsink
- Ideal for e.g. op-amp applications, amplifiers, …
- Trimmers can be replaced by potmeters to allow continuous adjustment of output voltage
- LED output indicators
- Positive and negative output adjustable between 1.2 and 24VDC
- Output current: up to 2 x 1A continuous (with suitable heatsink)
- Max. input voltage: 2 x 24VAC
- Very good line and load regulation
- Low ripple
- Short circuit protection
- Thermal protection
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