I built new Programmers for other Microcontrollers. Recently I searched for a programmer for the Microcontroller PIC18F2220 and I found a software programmer that uses JDM circuit for programming it.
And then I searched about the advanced Microcontroller PIC18F4550 which can be directly connected to the USB port. The best thing was it can also be programmed by the same JDM circuit. The only modification I had to do with the circuit is adding a new socket for the new Microcontroller chips. The Microcontroller chip PIC18F4550 has 40 pins so I had to install an extension to my old JDM circuit because it had no space left.
That`s the way I built this extension. A 40 Pin IC connector on small piece of plastic connected to wire by the conductive ink.
Basically, all the PIC Microcontrollers use the same pins for programming.
Five pins are used for basic serial programming :
Vpp ----- Programming voltage
Vdd ----- Vcc
Vss ----- Gnd
Data ----- Serial Data
Then I welded the wires to the PIC18F2220 28 pin IC connector.
Programmer software loader used with this circuit :
إذا كان لديك مولود أو تتوقع مولوداً جديداً يمكنك الإشتراك المجانى فى قائمة المولود من موقع أمازون والتى يمكنك من خلالها الإطلاع على أحدث العروض والمنتجات الخاصة بالمولود مع إمكانية عمل قائمة الأمنيات وجعل هذه القائمة ظاهرة لأصدقائك مما يمكنهم من معرفة أفضل الهدايا للمولود أو مختفية ولاتظهر إلا لك فقط
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