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magicChristian 4 hours ago
Hi Dany,  now I found time and changed the circuit to what I wanted.  I also simulated in LTSpice and it looks good. Maybe the dimension can be optimized.
230V AC dimmer, mains isolated, using P12F629
Calpe 5 hours ago
For those choosing to build two amps, the question comes as to what Power Supply to use. Several comments have been made in this project whether to use 55v or to get max. output from the amp, peak power etc etc. My question raises the question if two single power supplies should or can be used or just to use one single higher rated PSU. For two single PSU's then the Connexelectronic SMPS500R can be used. These are capable of delivering 500W continuous and 650W peak power. The cost each would be $82, plus postage. However, the SMPS800RE are capable of delivering 800W continuous and 1000W peak power, and are priced at $112. Logically, it makes sense to use one single PSU. My question lies as to whether there might be any complications using one single PSU? Some technical expertise would be appreciate before ordering the final components and switching on. 
Q-Watt - Simple Audio Power Amplifier (110656)
sequencer 8 hours ago
After the PCBs arrived I've mounted a first unit and performed some basic tests.  At the initial trials I had some troubles keeping under control the 200GHz gain-bandwidth product of the TL3116. I achieved it with a little of positive feedback (that's what all we need). Now I'd say the main goals are fulfilled.   Fully differential, compact design (100x56mm PCB). Low-cost, easy to find components. Can be supplied directly from the secondary of a mains transformer (18V AC max), or from a DC power supply. Differential gain: 26 dB Current consumption at rest: approx. 48mA at 24 Vdc supply (1.1W) approx. 37mA at 12 Vdc supply (0.44W) Modulating PWM frequency: approx. 650kHz DC voltage at output: < 10mV Bandwidth: 10Hz .. 20kHz -2dB THD+N at 24Vdc supply and 8Ω load (low-cost inductors and bulk capacitors): < 0.04% at 1W output < 0.06% at 10W output < 0.5% at 30W output SNR max. (10 W output): > 82dB During the next days I'm going to take more measurements and try tuning on some component values. Then I'll post the complete design with files and graphs. Thank you.
greenlicium 12 hours ago
"my applicative god" .... or evil as you want!
SolarBench: test your solar panel up to 300W with a MPPT matchbox
greenlicium 12 hours ago
okay... so 1 point for hardware, but also 1 point for software. guess what... I was very happy yesterday, found a source code with #pragma directive to tune the PLL with 16Mhz quartz and compiling it. It works... BUT, unfortunatly when I download my applicative god the system crash totaly , no more USB link at all.... strange? In fact the boot generated by the compiler dosn't fit into 0x0000 to 0x07ff adress range and of course applicative code starting at 0x800 intantly corrupt the bootloader... so what happen???? Easy : the old mcc18 compiler I'm using is a free version without code optimization.. so stupid they are ! don't deliver source code able to fit into the allowed size with the free toolchain. So I finnaly open the .hex file from the original dev kit, had manually the hex line to get the good 16Mhz Xtal prescaler configuration... You want it? so dowload it... grmllllll  
SolarBench: test your solar panel up to 300W with a MPPT matchbox