![]() ![]() Now I thought that I should make the serial programmer to program a brand new ATmega8 and connect it to my USBASP based programmer. Secondly, the error message I am getting at my console on avrdude is "unable to set SCK clock period". But there is a fault that I am facing, firstly, the power status light(ie Green LED) is not glowing and secondly, the busy flag is shown by green led, and not the red one. I thought that the problem maybe a fried ATmega8, but to my surprise when I connected it to my circuit that I have made as per the diagram provided (actually I am a novice). I had ordered the same programmer a few months ago, but it worked only twice, after that it is unable to work. Actually, I am building the USBASP based programmer you have posted. Hi Sir!, First of all I want to thank you that you have posted such a nice informative tutorial especially for beginners. Then tell me about those voltage level i will let you know more Reply Delete If the fmeter display stay the same the there is a problem of interface cable between pc and the hardwareĪnd please check for pin nummbering of the serial por once more most people do mistke right there Please verify that the crystal is on it's frequencyĪnd one more thing with frequency meter put the frequency meter's gnd prove to circuit's gnd and other prove to first MOSI then MISO and then CLK and clik the programming button ,then look for any frequency change ((we are not measureing any freq here lust looking for any change)) Marchel Plese tell me what is the level of Vce of the transistor (between emitter and collector) when you power up the programmerĪnd insted off internel clock i suggest you to please connect the external crystal.ĭid you have any frequency meter or something? If you still face any trouble then let me know Reply Delete ![]() (this programmer need external power supply to work)Īre you giveing the external power to both the programmer and the target microcontrollerĪnd to conferm that weather the crystal is working or not please use a mulimeter and check the frequency Now if all the above is okey but you still face the problemĬheck the vlotage level at the programmer Then there is a problem with the programmer harware it self ![]() If probe retrun with passed then it's fine Then click on the probe in i/o setting dialog box (without connecting the target microcontroller) I first recommond you to check all the connection properly,lot of people get this problem due to lose solderingĪfter checking the soldering connection connect the programmmer to com port and The error you are getting is really common, i know may guys to face this due the reasons blow ![]()
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