i have been assigned a long term assignement due to 10th january to construct a desktop power supply.
i decided to use an old VCR case as a body and have already installed 3 transformers inside giving 5v , 12v and 20v output using a single ground. it came really presentable with banana sockets and stuff. the only problem is i had 3/4 of the front panel of the unit is still empty.
other students have been adding stepper motor controls , or h-bridges or binary generators.
i have decided to add an astable timer that can control a binary counter or as a standalone. the problem i have already drilled the hole for the variable resistor , and i guess i screwed up.
i cannot find an astable 555 timer circuit that uses only 1 variable resistor and gives a 50% duty cycle . about 0.1-100 hz variations would be good .
thanks in advance because i do not have space to drill another hole for another variable res ,and it would only mean i would have to start again
i only started my project early to enjoy my holidays and i messed up
im fine with the binary counter circuit , i just have to hook it up to the 555 timer output and install the selector toggle switch
i decided to use an old VCR case as a body and have already installed 3 transformers inside giving 5v , 12v and 20v output using a single ground. it came really presentable with banana sockets and stuff. the only problem is i had 3/4 of the front panel of the unit is still empty.
other students have been adding stepper motor controls , or h-bridges or binary generators.
i have decided to add an astable timer that can control a binary counter or as a standalone. the problem i have already drilled the hole for the variable resistor , and i guess i screwed up.
i cannot find an astable 555 timer circuit that uses only 1 variable resistor and gives a 50% duty cycle . about 0.1-100 hz variations would be good .
thanks in advance because i do not have space to drill another hole for another variable res ,and it would only mean i would have to start again
i only started my project early to enjoy my holidays and i messed up
im fine with the binary counter circuit , i just have to hook it up to the 555 timer output and install the selector toggle switch