William At MyBlueRoom
New Member
Yup it's another ICD2 clone. It's about as simple as I could design it. The power supply (not shown) is a 5V DC switching wall wart and cost me $2 from a surplus store in Toronto.
I used a 16F876 (not A) with microchips firmware and it passes all self tests. I've designed it with a weedy power stealing VPP from the MAX232 (with big 10uf caps) and a 1.5x multiplier (the diodes and such bring it down to approx 12.8V)
Looking at the scads of ICD2 clones on the net and the might work might not modded firmware for the 16F876A I stuck with the still available 16F876 (If you've got working 16F876A firmware let me know)
The Lothar Stolz ICD2 clone is very good **broken link removed** , it's the basis of this one (the Inchworm). Only real change is the power supply and LEDs. I haven't tried his LM358 op-amp version. I don't see how it generates all three states for VPP. (12.5V target VPP, 5V target run, 0V reset)
Comments & flames welcome
I used a 16F876 (not A) with microchips firmware and it passes all self tests. I've designed it with a weedy power stealing VPP from the MAX232 (with big 10uf caps) and a 1.5x multiplier (the diodes and such bring it down to approx 12.8V)
Looking at the scads of ICD2 clones on the net and the might work might not modded firmware for the 16F876A I stuck with the still available 16F876 (If you've got working 16F876A firmware let me know)
The Lothar Stolz ICD2 clone is very good **broken link removed** , it's the basis of this one (the Inchworm). Only real change is the power supply and LEDs. I haven't tried his LM358 op-amp version. I don't see how it generates all three states for VPP. (12.5V target VPP, 5V target run, 0V reset)
Comments & flames welcome
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