CircuitCoin is a Proof of Work/Proof of Stake hybrid. It uses de SHA256D algorithm and it has a dynamic PoS reward system in which the rewards gets smaller every year for three years:
1st year: 30%
2nd year: 20%
3rd year: 5%
CircuitCoin (CIR) uses the SHA256D algorithm and relies on the PoW/PoS proof type.