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22 Threads found on edaboard.com: And Laboratory Power Supply
To make a reliable power supply for your project, use a battery or make a regulated laboratory power supply from a 12 V, 1A wall power source. Some types are available with a switchable voltage output, but add a filter and adjustable regulator with LM317 T or 7805...7812 (...)
Hi, i've to design a feedback for my isolated push-pull converter. The feedback is an OR between voltage and current sense. In that way my DC/DC should work as a laboratory power supply. I've drawn the schematic in figure below 116973 Apart from compensation network and from the voltage (...)
most people test low power broadband, and then do high power at only one or two frequencies. To get different frequencies, you buy multiple magnatrons to put on the same power supply
Some time to deal with the idea of ​​building a laboratory source 0-50V approx cca100W / module. The original idea was transformer 230/50V -> step-down converter -> linear regulators. This arrangement would provide good efficiency, high accuracy and low noise. Module could be up to 4 pieces, with everything that used to (...)
where did you get the box and what ADC did you used. Nice one.
have you tried temporarily using a larger source (ex. a dc power supply from your laboratory)? You did mention using a regulated source, but i'm not sure what you mean (a larger regulated source or simply a voltage regulator?). I think using 2 AA batteries (so 3 volts?) is quite a restriction for something which has 2 stepper motors (...)
The power supply consists of two separate modules 0-30V 3A. The current and voltage for each of the modules can be controlled roughly as well as accurately. The button on the panel turns on the symmetrical voltage, w
The system is an ordinary regulated power supply built on a rather old stabilizer uA723. The power supplies symmetrical output voltage 3,3-2,6V and current up to 3A. Exceeding the maximum current will cut off the out
It is a 3-channel laboratory power supply with a total capacity of about 110W. It has two pulse stabilized channels with continuous voltage 0-13V, a constant current limit threshold 4A and USB channel linearly stabilized with two
Hi, I have used the LM2700 to boost a 5v supply to 12v (currently using a laboratory power supply). The behavior is fine but when the load needs a surge of current (1A), the input and output voltage drops significantly. Will like to ask if there's any workaround to give a short current boost when needed. (...)
Hello, with friends work on precision laboratory power supply 0-50V 0-10A with 16bit digital control. In first step we design dc step down with Synchronous Buck Controller LM5116, in second step precision linear regulation see below on picture. Digital control is MCU with 24bit ADC and 16bit DAC , control voltage 0-10V (...)
Hello, I make on precision laboratory power supply 0-50V 0-10A. In first step I use step-down Synchronous Buck converter 1.2- approximately 52V 10A In second step is very precise linear regulation 0-50V 0-10A. I have problem how bind switching and linear regulation block so that loss on linear step will minimum. (...)
How to setup in laboratory to test PSRR of a voltage regulator / bandgap circuit
Hi, Yes, the other way is/are_usually the only good way_ is to use a "step down" converter, if you need power too. If you need the 2.4 V only for "reference" voltage_you take practically no current from that_ you can apply a resistance attenuator... Other possibility is; you buy/take a regulated/laboratory power supply (...)
Nice, but have you any problem with the power supply or are you trying to sell it ? Let us know, could be interesting. Take care that type of power supplies are ready available on the market for about 30/35 Euro, with digital indicators. So think about a final price and the possibility to build many in an industrial (...)
This is a high gain circuit. I believe the TL071 is too noisy to serve as an amplifier for these signals (seems that IC3 is used as a guard-ring buffer). Also, carefully decouple the power supply near all op-amps and take care of your lay-out. Regards
Hi all, this is a total noob question. But i recently aquired a lab power supply and have been playing around with it. When i turn it on there is a voltage displayed but no current, then when i connect a circuit a current is displayed but no voltage. When checking with a multimeter it shows there is very little voltage (...)
i am doing rfid project and i have designed one power amplifier which converts 200mW to 4W(atleast). its configuration is class a . Ld=560nH INPUT SIDE HAS RESONANT CIRCUIT OF 120pF and 1uH OUTPUT HAS IMPEDANCE MATCHING NETWORK WHICH TERMINATES ON 50 OHMS THE PROBLEM IS IT TAKES EXCESSIVE CURRENT and LOADS THE (...)
Connect A- and B+ .. Then: A+ --> +15V B- --> -15V A- and B+ connected together will be your 0V .. Regards, IanP
I have been looking for a good circuit of a "laboratory" power supply. I finally found this one. That looks fairly good. It features a floating regulator that could be scalable to more voltage. and selects diferent secondaries to keep down the power dissipation at the series regulator. Specs:
Create a DUAL supply power supply by using bridge and a center tapped transformer, then make use of POSITIVE and NEGATIVE ADJUSTABLE Voltage Regulators. For Current Variable Adjust, I haven't used one for my circuits, it is as good as a current limiting regulator.
Any idea which issue and if it is available for download anywhere?