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Everything posted by mixos
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556 IC tester These are broken into 2 sections, one 556 tester will test the first 555ic timer within that 556 timer ic, plug it in push the button and the 2 leds will alternate telling you that the first 555ic timer within the 556 timer chip is working ok. plug the 556 into the second 556 ic tester, push the button, the 2 leds will alternate telling you that the second 555ic timer within the 556 timer chip is working ok by Steven (received via e-mail) 555 IC tester This 555 tester ,which can allso test the 7555 is realy handy, especially if you need to know if the timeres are working after you exstract, the timers from electronic junk, and for use in ignition coil and flyback driver circiuts by adding a push button and using an ic socket, just plug it in and push the button to test, the 2 leds will alternate to indicate the timer is working ok by Steven (received via e-mail)
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This circuit will test the 741 ic . by using an ic socket in place of the 741 ic youll be able to just plug in the ic to test to test slide the switch on and one led will come on , press the button the other led will come on to show this ic to be working ok this will test other intergrated circuits equivalent to the 741 ic by Steven (received via e-mail)
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Keep up hotwaterwizard ... I am sure you will catch me up!
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Hi Check: http://www.electronics-lab.com/projects/misc/016/index.html http://www.electronics-lab.com/forum/index.php?board=24;action=display;threadid=260 http://www.electronics-lab.com/forum/index.php?board=24;action=display;threadid=261
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Members rated depending the messages they write. 0-50 posts: Newbie over 50 posts: Jr. Member over 100 posts: Full Member over 250 posts: Sr. Member over 500 posts: Electronics God
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This simple circiut setup, is what i use to indicate 12 volts dc into all my circiuts, even the high voltage circiuts. and for 24 volts input change the resistor to 1.2k . faceing the rear of the togle switch the togle at the front is switched upwards, when wireing up this ,to indicate 12 volts dc to be flowing into your circiut. by Steven
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R4 on the right hand side of this circiut is a 1k resistor. this simple circiut. has an intergrated circiut socket to plug the logic ic into, use a push button switch , to switch it on to test. the 2 leds alternate if the logic ic works , very handy to have and if your installing it into a circiut box ,use pins or matrix pins in place of the ic socket, on the main board and run them to an ic socket mounted onto an ic socket board which can protrude through a square hole filed into the box pannel ,so that all you have to do is plug it in and push the button to test the logic ic out by Steven
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In these pictures one is the microwave oven motor generator conected to a 19 stage voltage multiplier which consists of 3kv ceramics and 1n4007 diodes, and in the other picture when i rotate the shaft peace of the motor with the use of a hanky chief to hold the plastic thing which slips onto the motor shaft, i get good arcs of electrissity between the 2 wire , which attach to the voltage multiplier circiut. the arcs can get better but i was lucky to get this one ,as setting the camera to take a picture while i crank the motor generator, aint no easy task. by Steven
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http://www.datasheetcatalog.com http://www.datasheetarchive.com http://databook.stts.edu http://www.datasheetlocator.com http://www.xs4all.nl/~ganswijk/chipdir/index.htm http://www.icmaster.com http://www.findchips.com/avail http://fileshare.eshop.bg/ http://62.236.156.23/ideaport/d/
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With the counter balenced swinging arm sitting on the pivot needle ,with its magnetic needle sitting midway inside the contact coil switch it on. any magnetic feilds or ground vibrations like an earth quake can set it off. once the detector goes off it will continue sounding till you switch it off and reset the detector so the needle is set in middle position through the contact coil without touching it, then switch it back on again. the electronics section is housed at the narrow end of the detector plattform it is afixed to ,this is made of wood in a near long tryangle shape , so that the electronics section is at a reasonable distance from the swinging arm peace. it runs off a nine volts battery. by Steven
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by Steven Here is the flyback transformer installed onto the home made pvc suporter allready fitted. into the circiut box First the power input, and on off switch and power input led indicator are installed, and the intergrated circiut socket mounting board with its wireing done, and the prototype board leg posts are in place. and the 25k and 10k pots to, Here is the component board with its components fitted, the mosfet and electro are at the rear of the box: Here the component board tinned coper wireing tracks are all solderd in place and continiuity checked: Here all the wireing from the ic socket mounting board and 10k and 25k potentiometers and the inputs are solderd to matrix pins or substtiutes on the component board. no wires are solderd directly to the board, so resoldering any wire that comes off is a super simple job. Here is the rear view of the component board for the flyback driver circiut. In this picture showing the wireing the n channell mosfet wireing hasent been done yet till i get a terminal strip for its wires and mov sitting in the box: Here at the rear of the home made pvc circiut box is the n channel mosfet attached to a heatsink ready for the wireing to it to be done . next to it is an exsternal 2200uf 50wv electro in a specially made home made pvc electro holder , in the case of a short these exsternal components are easy to replace: In this picture the high voltage positive output terminal and the black high voltage return are in place, along with the home made decal work. in this picture the flyback transformer wireing is done. the heatsink on the component board is for the 1500 volts protection diode allready in place. the last thing to do before testing is to get the tag strip that goes onto the bolt behind the rear pannel at the back of the mosfet, the mosfet wires go to it then from there to the mosfet pin positions on the component board, and the mov goes from drian to source on the tag strip, for the mosfet wires:
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That means that step input is : | 1 , t>0 u(t)= | | 0 , t<0 u(t) | 1 |-------------------------- |___________________ t 0 Right? Your system is this: INPUT : x(t)= u(t) OUTPUT : y(t)= impule response (unkown?) The relation between them is y(t)=h(t)*x(t) but h(t) can't be calculated easily right away... so you work at the frequency domain, where: INPUT : x(s)= L [u(t)] -> x(s)= 1/s (where L is Laplace tranform) OUTPUT : y(s)=H(s)*x(s) So IF you know (or can calculate) H(s) of your system then you can find y(s) becuase x(s)=1/s. Finally making reverse Laplace transform (L^-1) of y(s) you can find y(t) which is the IMPULSE RESPONSE: y(t) = (L^-1)[y(s)] Do you know H(s) or can u calculate it for your system?
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I came across a Digital Thermometer that used ICL7107 and it had a subcircuit to easilly produce the -5V that ICL7107 needs. I post it here:
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This reverse polarity protection circiut idea was inspired to me by hotwaterwizard. my idea here was to use mainly microwave oven parts, starting with the microwave oven filter circiut, and relays, and i threw in a few diodes and a 1uf 350 volts electro, and a fuse holding circiut board that takes six fuses , and i put in a rotary tap switch, all this ,i put into a home made pvc circiut box, at the front is the switch and input terminal posts and 2 leds, 1 led is power input indicator for 12 volts, the second led is the relay led , this indicates that the relay has come on and is passing 12 volts, now if the inputs were acidently reversed the relay will come on but not pass 12 volts, maybe a few but not 12. Now the fuses are there to protect the relay wireing in case of short in whatever you power with 12 volts. to simiulate you can short the outputs together and no1 fuse will blow, so by rotateing the rotary switch to the second fuse ill have that to use and it goes up to 3 fuses. the other 3 are spares, now the microwave oven filter circiut, this is an exsperimental idea as its a filter and because i can pass dc iether way through it id thought it may filter any reverse voltage transients from some of my high voltage exsperiments should i decide to link it with one. the microwave oven filter circiut has its own fuse, i deliberately blew that fuse to tap onto the end fuse caps to run it to the other fuses via the rotary switch , ill add more updates when i link this in in some high voltage exsperiments. by Steven
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This high voltage bridge rectifier made from microwave oven diodes, i was able to find out the details of these diodes from the net, each is rated at 12kv 550ma so in total thats 48kv by Steven
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:) This circiut housed in one of my home made pvc circiut boxes consists of a driver circiut and 12 volts regulator circiut and on the right a modified 12 volts auto ignition coil . the timer for the circiut is at the front pannel pluged into a 555 ic socket fixed to an ic mounting board ,this socket protrude out the front pannel to make replacements simple in case the timer goes faulty. The 2n3055 npn power transister is at the rear on a heatsink so its easy to replace, like the timer which you only have to unplug it and plug in a new one the modified coil has a new pvc body and the negative input and negative return are rerouted away from the hv positive out of the coil so theres no arcing. the pvc coil body is held in place by a home made pvc coil holder by Steven :) This is a multi ignition coil driver circiut with one modified 12 volts auto ignition coil and one unmodified 12 volts auto ignition coil so this has 2 high voltage returns , one at the front and one at the rear :) This circiut allso housed in a home made pvc circiut box consists, of an ignition coil driver circiut and modified 12 volts auto ignition coil and high voltage trippler, black coloured, and a hiigh voltage modified polarity indicator. the 2n3055 npn transistor at the rear easy to replace and timer at the front just plug it in and this circiut puts out deadly thick looking arcs of electrissity :) This is another high voltage circiut consists of an ignition coil driver circiut with transistor at the rear and timer at the front pannel for easy access and replacement. allso another type of high voltage trippler and modified 12 volts auto ignition coil the trippler is green and coil black :) This multi flyback transformer unit contain 2 different types of flyback transformers, one has the hv output and returns both at the top . and can be switched in one at a time for use, the driver circiut is separate and the meter was a 50 volts meter but i use it as a ion wind meter . now this meter only has one wire the other terminal which i have not finished doing is gona be the antanae for high voltage ion wind if ive got it corect so this meter works in what looks like open circiut . its all been tested . The flyback transformer with the hv output and return at the top is the one that can run through the high voltage pollarity indicator circiut with greater arcs than without and other suprizes by Steven
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This unit has an ignition coil and flyback driver circiut in the one unit. by Steven this ignition coil driver circiut prototype works really good with a 12 volts lead acid cell rechargeble battery. and i was able to power up to 3 ignition coils in parralell with this unit
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Here we will try to compile a list of high quality electronic sites. Post yours also :D: http://www.imagineeringezine.com/e-zine/hcircuits.html http://www.commlinx.com.au/schematics.htm
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This simple looking circiut i modified to run off the high voltage output of one out of 2 high voltage output flyback transformers in a multiflyback driver circiut i biult, the leds work perfect no burnouts and by adjusting the driver circiut i get one led come on telling me its high voltage dc, with some more adjustments i get 2 leds come on telling me its now high voltage ac, 2 of the wires dont touch, as one is an antanae and the other hv out, i found not only increased arcs but plenty blue , leaveing me to ponder if this would be a good lifter power source like used in the j naudin lifter sites on the net so ill be conducting more tests. by Steven
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This simple scr testor uses very few components but the main one is the 12 volts auto indicator flasher unit from a car. of which is what flashers your indicators, the socket to plug the scr into you can make by breaking down a large intergrated circiut socket, into a length that has 3 sockets for a 3 legged component . You will get the idea by viewing the n channel mosfet testor of which the ic socket section for plugging the mosfet into has 4 sections insteatd of 3, but you only use 3. the extra one . disregard. it now3 this scr testor allso ,as i found out recently has a few good uses. and one is a reverse mode transformer testor , which puts out 2 pulses from a 12 volts input, one is the steped up voltage from the transformer the second is the kickback pulse from the indicator flasher units internal coil or relay coil. by Steven This simple scr testor , has some good uses and i used it to pulse test a transformer in reverse mode i got one good shock from the transformer and a small one followed , i beleave was the kickback pulse from the flasher units coil in the picture you see the scr plugged into a cut down ic socket, of which i used as an scr plug . just push the button for a short time to test the scr ,and once the relay activates and the led blinks on and off till the internal capacitor in the flasher units charge is drained . but as long as the relay activates and the led blinks you can still be asure the scr is working ok , as its part of the circiut.
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Heats fast, cools fast The Cold Heat Soldering Tool is a cordless tool that heats quickly and cools down nearly as fast. It creates the heat right in the proprietary tip material, making the tool 20 times more efficient than the average conventional soldering iron. The tip reaches 500 F in less than 1 second for many types of joints and cools to the touch in 1-5 seconds so you can put it away
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This simple mosfet tester ill email you what it looks like as a unit simple and effective if you have any trouble seeing it let me know ill redo a highlighted version. by Steven
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Steven writes:
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Here comes more photos:
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Steven writes: