Bedankt voor deze video! Ik heb een Nixie klok gekocht met een NE555 HV circuit maar de Mosfet en 1N4007(!) diode worden ong. 90 graden bij 9V input dus ik ga jouw schema eens proberen! ;)
This works: Keep the 555 Change R7 to 1k5, then connect your PWM via another 1k5 resistor to the base of Q4. If PWM=0% then you get ~170V, then the higher the PWM% the lower the Vout. This may work, but is quite bit harder: You can also try to directly clock the MOSFET with a PWM and make a feedback with an analog input, but take care, if uncontrolled the voltage can be very high (suggest to put a load on the output to prevent the elcap to blow up....).
the MOSFET and diode should be best 400V, especially the diode is sensitive. Depending on your layout 300V is OK< 250 is a no-go. REcommend 400V 1A for the diode
Hello, First of all verry nice video! I want to design a pcb for 6 nixie tubes and im wondering if i take this schematic, can i just take it and put it on a pcb together with the tubes, drivers, RTC e.t.c.? Are there any things i have to watch out for, in terms of the layout or the 180V + traces? I know how to do most of it, i just never worked with such high voltages on a pcb together with data lines and stuff.
I just built it... I got 343V at the output and something started to smell funny, I don't know which component it was though. My coil is not a drum type, but a toroid shape instead and I used a simple chinese transistor tester to measure its inductance, which was around 40uH; my C1 capacitor was 10uF instead of 15 and instead of the R3 and R7 i used 2 resistors arranged in line with a value of around 700 ohms. Also it was supplied from a 9.3V DC supply. Any idea as a suggestion would be appreciated.
haha congratulations -you just set a record! I think your feedback loop is not working, is R8 not connected(HV to the BC547 base) or broken/wrong transistor?
i need to make one, i have some nice old NOS 555 timers and need ot for my displays, think its possible to make without a mosfet and only a transistor?
@@ZethieTail I don't think that bipolar transistors are much likely to be suited for this job... btw if you need a nixie power supply I'd rather suggest building this: threeneurons.wordpress.com/nixie-power-supply/ MC34063 Based Nixie power supply
