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Newly built PWM Controller doesn't work!

post #1 of 2
Thread Starter 
Hello world!

Found this page http://www.overclockers.com/pwm-fan-controller a while back and decided to have a go at the 556 pwm controller which is located about halfway down the page...

Bought the components and put it all together, and I can't control my testfan, it just goes directly to 100% and stays there, I removed the wire going from the potentiometer to the 4th pin (PWM) of the fan, and nothing changed, so to me that indicated that the problem lies somewhere else in the circuit. I didn't expect it to work right away, but I'm not sure where to look either...measured between current input and output and I have 5 volts going through the circuit, and no components have blown up/started smoking so great sucess so far smile.gif

I've also measured to check that I have contact on the soldering joints on the circuit, which I have, but of course I could have missed something, so I was hoping that someone here could help out...
post #2 of 2
It really has no secret. If it is not working, it's because the signal generating 555 isn't working.

I can't say anything but... Double check the wiring. Because it works tongue.gif
   
AGP bencher
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AGP bencher
(14 items)
 
CPUMotherboardGraphicsRAM
Ryzen R7 1700 Gigabyte GA-AX370-Gaming 5 Sapphire HD 6950 2GiB 2x8GB KFA2 HOF DDR4-3600 
Hard DriveHard DriveHard DriveHard Drive
Crucial MX100 256GB Seagate 600 Series 240GB Seagate 7200.14 2TB Samsung F3 1TB 
CoolingCoolingCoolingCooling
EKWB Supreme HF XSPC Rasa GPU EK XT360 EK 4.0 
OSMonitorMonitorKeyboard
W10 Pro LG IPS235 LG E2250V KUL ES-87 
PowerCaseMouseAudio
SF Leadex II 650W Lian Li PC-A05NB Logitech G9 Xonar DX 
AudioAudio
SMSL SA-S3+Technics CB-250 Sennheiser HD555 
CPUMotherboardRAMHard Drive
AMD A10-5700 Gigabyte F2A75M-HD2 G.SKILL Ares 2133 CL9 Hitachi 5K750 
Hard DriveCoolingOSMonitor
Momentus .7 200GB Noctua NH-L9a Server 2012 R2 Standard AUO B156HW01 
PowerCaseOther
PicoPSU-80-WI-25V AIO Aluminium Handmade TP-Link Archer Something Something Wi-Fi AC 
CPUCPUCPUMotherboard
Core2Duo E6400 Core2Quad Q6600 Pentium Dual Core E5200 AsRock 4COREDUAL-SATA2 R2.0 
GraphicsRAMHard DriveOptical Drive
A dumpload of ancient AGP cards Kingston Value DDR2-667 CL4 2T @CL3 1T Seagate 160GB 7200.10 LG IDE DVD-ROM 
CoolingCoolingOSMonitor
Ghettomade CPU waterblock 49cc 2stroke engine copper radiator WinXP SP2 32bit ProView 17" 
PowerCase
Tacens Radix V 550W Ghetto aluminium bench 
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