Regulated High Voltage Power Supply
The Circuit below is a paper design and not tested. It can be used for education and information, this can help you make your own design. Please do not just wire it up and...
Category: Power-Electronics
Mains Voltage monitor using LM3914
This Circuit helps in the monitoring of mains supply voltage. It does not use a isolation step down transformer. This has to be constructed only by skilled people with knowledge of safety requirements. C1...
Battery Level LED Indicator
This LED Indicator uses a LM339, a quad comparator. LM339 can work on single or dual supplies, it has a open collector output that can drive 15mA, low power consumption. The circuit is an...
Drive SCR thyristor with 555
This circuit gives a burst of pulses to fire 2 SCRs, when pin 4 is taken to 12V the SCR is turned on, to use this circuit you need 12V short pulses phase shifted...
+5 to -5 using a 555 Astable Multivibrator
This is a very simple -5V supply using one 555, useful for analog blocks using FET Opamps using low power. This circuit came up when i had to design limited by inventory. It worked...
Calculate THD – Total Harmonic Distortion
I want to know about IEEE 519 Harmonics standards. And Formulas to calculate Total Harmonic Distortion (THD) for Voltage and Current according IEEE standards. Till now i am calculating by taking Square root of...
Mains Stability and Supply Regulation
I have problem with my power supply… . The power supply uses LM317 and TIP2955 and the unstable AC net here causes the output to drop sometimes below 5V. The normally output is 13,5V....
DC Motor Speed Control
The following was submitted on February 1st, 2006 at 08:49AM (PST).- Subject: delabs Schematic Source Request. Circuit: speed motor control dc mail from MD Study Resources Below Speed Controllers – The purpose of a motor speed...
